/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/fermat1-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 04:46:54,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 04:46:54,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 04:46:54,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 04:46:54,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 04:46:54,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 04:46:54,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 04:46:54,907 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 04:46:54,911 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 04:46:54,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 04:46:54,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 04:46:54,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 04:46:54,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 04:46:54,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 04:46:54,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 04:46:54,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 04:46:54,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 04:46:54,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 04:46:54,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 04:46:54,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 04:46:54,922 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 04:46:54,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 04:46:54,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 04:46:54,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 04:46:54,936 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 04:46:54,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 04:46:54,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 04:46:54,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 04:46:54,945 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 [2022-01-31 04:46:54,976 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 04:46:54,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 04:46:54,977 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-31 04:46:54,977 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-31 04:46:54,977 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-31 04:46:54,978 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-31 04:46:54,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-31 04:46:54,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-31 04:46:54,978 INFO L138 SettingsManager]: * Use SBE=true [2022-01-31 04:46:54,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 04:46:54,979 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 04:46:54,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 04:46:54,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 04:46:54,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 04:46:54,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 04:46:54,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 04:46:54,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 04:46:54,980 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 04:46:54,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 04:46:54,980 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 04:46:54,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 04:46:54,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 04:46:54,980 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 04:46:54,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 04:46:54,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 04:46:54,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 04:46:54,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-31 04:46:54,982 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-31 04:46:54,982 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 04:46:54,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-31 04:46:54,982 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-31 04:46:54,982 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-31 04:46:54,983 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 04:46:54,983 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 04:46:55,192 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 04:46:55,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 04:46:55,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 04:46:55,214 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 04:46:55,215 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 04:46:55,216 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound100.c [2022-01-31 04:46:55,267 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d5ccb73/6ae4d9aaf78c47979b79e4e422235f7e/FLAGd7f6f7b7f [2022-01-31 04:46:55,591 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 04:46:55,591 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound100.c [2022-01-31 04:46:55,598 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d5ccb73/6ae4d9aaf78c47979b79e4e422235f7e/FLAGd7f6f7b7f [2022-01-31 04:46:55,618 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d5ccb73/6ae4d9aaf78c47979b79e4e422235f7e [2022-01-31 04:46:55,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 04:46:55,621 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 04:46:55,624 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 04:46:55,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 04:46:55,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 04:46:55,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:46:55" (1/1) ... [2022-01-31 04:46:55,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c5e956b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:55, skipping insertion in model container [2022-01-31 04:46:55,629 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:46:55" (1/1) ... [2022-01-31 04:46:55,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 04:46:55,649 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 04:46:55,758 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/fermat1-ll_unwindbound100.c[535,548] [2022-01-31 04:46:55,774 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 04:46:55,780 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 04:46:55,792 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/fermat1-ll_unwindbound100.c[535,548] [2022-01-31 04:46:55,799 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 04:46:55,821 INFO L208 MainTranslator]: Completed translation [2022-01-31 04:46:55,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:55 WrapperNode [2022-01-31 04:46:55,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 04:46:55,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 04:46:55,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 04:46:55,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 04:46:55,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:55" (1/1) ... [2022-01-31 04:46:55,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:55" (1/1) ... [2022-01-31 04:46:55,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:55" (1/1) ... [2022-01-31 04:46:55,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:55" (1/1) ... [2022-01-31 04:46:55,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:55" (1/1) ... [2022-01-31 04:46:55,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:55" (1/1) ... [2022-01-31 04:46:55,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:55" (1/1) ... [2022-01-31 04:46:55,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 04:46:55,872 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 04:46:55,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 04:46:55,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 04:46:55,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:55" (1/1) ... [2022-01-31 04:46:55,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 04:46:55,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:46:55,895 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) [2022-01-31 04:46:55,907 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 [2022-01-31 04:46:55,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 04:46:55,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 04:46:55,937 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 04:46:55,937 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 04:46:55,937 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 04:46:55,937 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 04:46:55,937 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 04:46:55,937 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 04:46:55,938 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 04:46:55,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 04:46:55,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 04:46:55,938 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 04:46:55,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 04:46:55,938 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 04:46:55,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 04:46:55,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 04:46:55,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 04:46:55,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 04:46:55,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 04:46:55,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 04:46:55,993 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 04:46:55,994 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 04:46:56,107 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 04:46:56,113 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 04:46:56,113 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 04:46:56,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:46:56 BoogieIcfgContainer [2022-01-31 04:46:56,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 04:46:56,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 04:46:56,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 04:46:56,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 04:46:56,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:46:55" (1/3) ... [2022-01-31 04:46:56,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a798ab3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:46:56, skipping insertion in model container [2022-01-31 04:46:56,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:55" (2/3) ... [2022-01-31 04:46:56,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a798ab3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:46:56, skipping insertion in model container [2022-01-31 04:46:56,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:46:56" (3/3) ... [2022-01-31 04:46:56,121 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound100.c [2022-01-31 04:46:56,124 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-31 04:46:56,125 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 04:46:56,161 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 04:46:56,171 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 [2022-01-31 04:46:56,171 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 04:46:56,185 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 04:46:56,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 04:46:56,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:46:56,189 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 04:46:56,190 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:46:56,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:46:56,194 INFO L85 PathProgramCache]: Analyzing trace with hash 928708300, now seen corresponding path program 1 times [2022-01-31 04:46:56,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:46:56,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132447422] [2022-01-31 04:46:56,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:46:56,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:46:56,310 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:46:56,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091836524] [2022-01-31 04:46:56,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:46:56,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:46:56,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:46:56,319 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) [2022-01-31 04:46:56,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 04:46:56,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 04:46:56,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-31 04:46:56,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 04:46:56,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 04:46:56,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 04:46:56,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 04:46:56,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132447422] [2022-01-31 04:46:56,531 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 04:46:56,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091836524] [2022-01-31 04:46:56,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091836524] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 04:46:56,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 04:46:56,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-31 04:46:56,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938555968] [2022-01-31 04:46:56,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 04:46:56,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-31 04:46:56,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 04:46:56,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-31 04:46:56,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-31 04:46:56,573 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) 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) [2022-01-31 04:46:56,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 04:46:56,599 INFO L93 Difference]: Finished difference Result 67 states and 100 transitions. [2022-01-31 04:46:56,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-31 04:46:56,602 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 [2022-01-31 04:46:56,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 04:46:56,620 INFO L225 Difference]: With dead ends: 67 [2022-01-31 04:46:56,620 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 04:46:56,623 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 [2022-01-31 04:46:56,628 INFO L933 BasicCegarLoop]: 46 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, 46 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 [2022-01-31 04:46:56,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 04:46:56,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 04:46:56,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-31 04:46:56,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 04:46:56,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-01-31 04:46:56,677 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2022-01-31 04:46:56,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 04:46:56,677 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-01-31 04:46:56,678 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) [2022-01-31 04:46:56,678 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-01-31 04:46:56,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 04:46:56,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:46:56,681 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] [2022-01-31 04:46:56,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 04:46:56,897 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 [2022-01-31 04:46:56,897 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:46:56,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:46:56,898 INFO L85 PathProgramCache]: Analyzing trace with hash -155606603, now seen corresponding path program 1 times [2022-01-31 04:46:56,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:46:56,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697717450] [2022-01-31 04:46:56,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:46:56,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:46:56,914 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:46:56,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [871938116] [2022-01-31 04:46:56,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:46:56,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:46:56,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:46:56,921 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) [2022-01-31 04:46:56,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 04:46:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 04:46:56,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 04:46:56,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 04:46:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 04:46:57,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 04:46:57,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 04:46:57,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697717450] [2022-01-31 04:46:57,122 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 04:46:57,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871938116] [2022-01-31 04:46:57,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871938116] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 04:46:57,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 04:46:57,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 04:46:57,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982235835] [2022-01-31 04:46:57,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 04:46:57,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 04:46:57,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 04:46:57,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 04:46:57,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 04:46:57,132 INFO L87 Difference]: Start difference. First operand 32 states and 41 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) [2022-01-31 04:46:57,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 04:46:57,156 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2022-01-31 04:46:57,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 04:46:57,156 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 [2022-01-31 04:46:57,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 04:46:57,158 INFO L225 Difference]: With dead ends: 41 [2022-01-31 04:46:57,159 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 04:46:57,159 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 [2022-01-31 04:46:57,161 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 04:46:57,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 04:46:57,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 04:46:57,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-31 04:46:57,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 04:46:57,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-01-31 04:46:57,171 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2022-01-31 04:46:57,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 04:46:57,172 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-01-31 04:46:57,172 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) [2022-01-31 04:46:57,172 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-01-31 04:46:57,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 04:46:57,173 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:46:57,173 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] [2022-01-31 04:46:57,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 04:46:57,394 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 [2022-01-31 04:46:57,395 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:46:57,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:46:57,396 INFO L85 PathProgramCache]: Analyzing trace with hash -153938307, now seen corresponding path program 1 times [2022-01-31 04:46:57,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:46:57,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518722292] [2022-01-31 04:46:57,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:46:57,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:46:57,410 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:46:57,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433858314] [2022-01-31 04:46:57,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:46:57,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:46:57,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:46:57,412 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) [2022-01-31 04:46:57,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 04:46:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 04:46:57,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 04:46:57,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 04:47:05,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 04:47:05,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 04:47:05,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 04:47:05,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518722292] [2022-01-31 04:47:05,991 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 04:47:05,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433858314] [2022-01-31 04:47:05,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433858314] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 04:47:05,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 04:47:05,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 04:47:05,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357409619] [2022-01-31 04:47:05,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 04:47:05,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 04:47:05,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 04:47:05,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 04:47:05,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 04:47:05,993 INFO L87 Difference]: Start difference. First operand 34 states and 43 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) [2022-01-31 04:47:07,052 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 04:47:09,586 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 04:47:09,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 04:47:09,616 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-01-31 04:47:09,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 04:47:09,617 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 [2022-01-31 04:47:09,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 04:47:09,618 INFO L225 Difference]: With dead ends: 53 [2022-01-31 04:47:09,618 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 04:47:09,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 04:47:09,620 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 04:47:09,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 126 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-31 04:47:09,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 04:47:09,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-01-31 04:47:09,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 04:47:09,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2022-01-31 04:47:09,631 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2022-01-31 04:47:09,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 04:47:09,631 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2022-01-31 04:47:09,631 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) [2022-01-31 04:47:09,632 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2022-01-31 04:47:09,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 04:47:09,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:47:09,632 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] [2022-01-31 04:47:09,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 04:47:09,833 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 [2022-01-31 04:47:09,834 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:47:09,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:47:09,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1676885497, now seen corresponding path program 1 times [2022-01-31 04:47:09,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:47:09,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820857458] [2022-01-31 04:47:09,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:09,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:47:09,843 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:47:09,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906276791] [2022-01-31 04:47:09,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:09,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:09,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:47:09,845 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) [2022-01-31 04:47:09,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 04:47:09,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 04:47:09,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 04:47:09,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 04:47:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 04:47:10,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 04:47:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 04:47:10,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 04:47:10,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820857458] [2022-01-31 04:47:10,192 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 04:47:10,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906276791] [2022-01-31 04:47:10,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906276791] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 04:47:10,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 04:47:10,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-01-31 04:47:10,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181125165] [2022-01-31 04:47:10,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 04:47:10,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 04:47:10,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 04:47:10,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 04:47:10,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-31 04:47:10,195 INFO L87 Difference]: Start difference. First operand 50 states and 67 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) [2022-01-31 04:47:10,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 04:47:10,301 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2022-01-31 04:47:10,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 04:47:10,301 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 [2022-01-31 04:47:10,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 04:47:10,305 INFO L225 Difference]: With dead ends: 57 [2022-01-31 04:47:10,307 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 04:47:10,308 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 [2022-01-31 04:47:10,313 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 04:47:10,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 111 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 04:47:10,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 04:47:10,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2022-01-31 04:47:10,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 04:47:10,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-01-31 04:47:10,325 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 29 [2022-01-31 04:47:10,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 04:47:10,325 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-01-31 04:47:10,326 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) [2022-01-31 04:47:10,326 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-01-31 04:47:10,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 04:47:10,326 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:47:10,327 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, 1, 1, 1] [2022-01-31 04:47:10,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 04:47:10,527 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 [2022-01-31 04:47:10,527 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:47:10,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:47:10,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1154059858, now seen corresponding path program 1 times [2022-01-31 04:47:10,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:47:10,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121111808] [2022-01-31 04:47:10,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:10,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:47:10,538 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:47:10,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1961516518] [2022-01-31 04:47:10,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:10,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:10,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:47:10,542 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) [2022-01-31 04:47:10,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 04:47:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 04:47:10,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 04:47:10,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 04:47:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 04:47:10,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 04:47:10,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 04:47:10,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121111808] [2022-01-31 04:47:10,683 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 04:47:10,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961516518] [2022-01-31 04:47:10,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961516518] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 04:47:10,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 04:47:10,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 04:47:10,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95843447] [2022-01-31 04:47:10,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 04:47:10,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 04:47:10,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 04:47:10,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 04:47:10,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 04:47:10,685 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 04:47:10,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 04:47:10,722 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2022-01-31 04:47:10,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 04:47:10,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2022-01-31 04:47:10,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 04:47:10,724 INFO L225 Difference]: With dead ends: 65 [2022-01-31 04:47:10,724 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 04:47:10,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 04:47:10,726 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 04:47:10,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 103 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 04:47:10,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 04:47:10,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-01-31 04:47:10,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 04:47:10,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-01-31 04:47:10,736 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 35 [2022-01-31 04:47:10,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 04:47:10,736 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-01-31 04:47:10,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 04:47:10,736 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-01-31 04:47:10,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 04:47:10,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:47:10,738 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 04:47:10,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 04:47:10,960 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 [2022-01-31 04:47:10,961 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:47:10,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:47:10,961 INFO L85 PathProgramCache]: Analyzing trace with hash -174895632, now seen corresponding path program 1 times [2022-01-31 04:47:10,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:47:10,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841501477] [2022-01-31 04:47:10,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:10,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:47:10,976 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:47:10,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1917523721] [2022-01-31 04:47:10,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:10,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:10,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:47:10,981 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) [2022-01-31 04:47:10,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 04:47:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 04:47:11,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 04:47:11,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 04:47:11,123 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 04:47:11,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 04:47:11,270 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 04:47:11,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 04:47:11,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841501477] [2022-01-31 04:47:11,271 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 04:47:11,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917523721] [2022-01-31 04:47:11,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917523721] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 04:47:11,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 04:47:11,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-01-31 04:47:11,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459291369] [2022-01-31 04:47:11,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 04:47:11,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 04:47:11,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 04:47:11,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 04:47:11,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-31 04:47:11,273 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 04:47:11,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 04:47:11,344 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2022-01-31 04:47:11,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 04:47:11,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-01-31 04:47:11,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 04:47:11,345 INFO L225 Difference]: With dead ends: 74 [2022-01-31 04:47:11,345 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 04:47:11,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-31 04:47:11,346 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 28 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 04:47:11,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 112 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 04:47:11,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 04:47:11,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-01-31 04:47:11,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 04:47:11,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-01-31 04:47:11,354 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 41 [2022-01-31 04:47:11,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 04:47:11,355 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-01-31 04:47:11,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 04:47:11,355 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-01-31 04:47:11,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 04:47:11,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:47:11,356 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 04:47:11,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 04:47:11,577 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 [2022-01-31 04:47:11,578 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:47:11,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:47:11,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1292932747, now seen corresponding path program 1 times [2022-01-31 04:47:11,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:47:11,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562422885] [2022-01-31 04:47:11,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:11,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:47:11,588 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:47:11,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806448808] [2022-01-31 04:47:11,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:11,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:11,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:47:11,590 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) [2022-01-31 04:47:11,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 04:47:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 04:47:11,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 04:47:11,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 04:47:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 04:47:11,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 04:47:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 04:47:11,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 04:47:11,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562422885] [2022-01-31 04:47:11,828 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 04:47:11,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806448808] [2022-01-31 04:47:11,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806448808] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 04:47:11,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 04:47:11,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-01-31 04:47:11,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217750118] [2022-01-31 04:47:11,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 04:47:11,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 04:47:11,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 04:47:11,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 04:47:11,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-31 04:47:11,830 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-01-31 04:47:11,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 04:47:11,950 INFO L93 Difference]: Finished difference Result 129 states and 160 transitions. [2022-01-31 04:47:11,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 04:47:11,951 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 43 [2022-01-31 04:47:11,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 04:47:11,952 INFO L225 Difference]: With dead ends: 129 [2022-01-31 04:47:11,952 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 04:47:11,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-01-31 04:47:11,953 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 88 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 04:47:11,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 180 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 04:47:11,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 04:47:11,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2022-01-31 04:47:11,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 69 states have internal predecessors, (83), 18 states have call successors, (18), 10 states have call predecessors, (18), 8 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 04:47:11,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2022-01-31 04:47:11,973 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 43 [2022-01-31 04:47:11,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 04:47:11,973 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2022-01-31 04:47:11,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-01-31 04:47:11,974 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2022-01-31 04:47:11,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 04:47:11,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:47:11,975 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 04:47:12,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 04:47:12,195 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 [2022-01-31 04:47:12,196 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:47:12,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:47:12,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1407897436, now seen corresponding path program 1 times [2022-01-31 04:47:12,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:47:12,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658834754] [2022-01-31 04:47:12,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:12,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:47:12,205 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:47:12,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197839968] [2022-01-31 04:47:12,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:12,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:12,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:47:12,210 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) [2022-01-31 04:47:12,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 04:47:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 04:47:12,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 04:47:12,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 04:47:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 04:47:12,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 04:47:12,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 04:47:12,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658834754] [2022-01-31 04:47:12,342 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 04:47:12,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197839968] [2022-01-31 04:47:12,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197839968] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 04:47:12,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 04:47:12,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 04:47:12,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504793568] [2022-01-31 04:47:12,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 04:47:12,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 04:47:12,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 04:47:12,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 04:47:12,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-31 04:47:12,344 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 04:47:12,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 04:47:12,377 INFO L93 Difference]: Finished difference Result 158 states and 202 transitions. [2022-01-31 04:47:12,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 04:47:12,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-01-31 04:47:12,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 04:47:12,380 INFO L225 Difference]: With dead ends: 158 [2022-01-31 04:47:12,380 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 04:47:12,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-31 04:47:12,381 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 23 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 04:47:12,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 99 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 04:47:12,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 04:47:12,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2022-01-31 04:47:12,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 80 states have internal predecessors, (97), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 04:47:12,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 137 transitions. [2022-01-31 04:47:12,401 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 137 transitions. Word has length 47 [2022-01-31 04:47:12,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 04:47:12,401 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 137 transitions. [2022-01-31 04:47:12,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 04:47:12,401 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 137 transitions. [2022-01-31 04:47:12,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 04:47:12,402 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:47:12,402 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 04:47:12,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 04:47:12,624 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 [2022-01-31 04:47:12,625 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:47:12,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:47:12,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1915058849, now seen corresponding path program 1 times [2022-01-31 04:47:12,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:47:12,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462502914] [2022-01-31 04:47:12,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:12,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:47:12,633 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:47:12,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403581789] [2022-01-31 04:47:12,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:12,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:12,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:47:12,635 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) [2022-01-31 04:47:12,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 04:47:12,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 04:47:12,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 04:47:12,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 04:47:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 04:47:12,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 04:47:12,931 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 04:47:12,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 04:47:12,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462502914] [2022-01-31 04:47:12,931 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 04:47:12,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403581789] [2022-01-31 04:47:12,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403581789] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 04:47:12,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 04:47:12,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-31 04:47:12,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086794947] [2022-01-31 04:47:12,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 04:47:12,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 04:47:12,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 04:47:12,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 04:47:12,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-01-31 04:47:12,933 INFO L87 Difference]: Start difference. First operand 109 states and 137 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2022-01-31 04:47:13,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 04:47:13,149 INFO L93 Difference]: Finished difference Result 219 states and 283 transitions. [2022-01-31 04:47:13,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 04:47:13,149 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) Word has length 49 [2022-01-31 04:47:13,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 04:47:13,151 INFO L225 Difference]: With dead ends: 219 [2022-01-31 04:47:13,151 INFO L226 Difference]: Without dead ends: 172 [2022-01-31 04:47:13,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-01-31 04:47:13,152 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 181 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 04:47:13,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 201 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 04:47:13,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-01-31 04:47:13,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 153. [2022-01-31 04:47:13,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 113 states have internal predecessors, (139), 30 states have call successors, (30), 12 states have call predecessors, (30), 10 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2022-01-31 04:47:13,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 197 transitions. [2022-01-31 04:47:13,173 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 197 transitions. Word has length 49 [2022-01-31 04:47:13,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 04:47:13,173 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 197 transitions. [2022-01-31 04:47:13,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2022-01-31 04:47:13,173 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 197 transitions. [2022-01-31 04:47:13,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 04:47:13,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:47:13,174 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 04:47:13,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 04:47:13,387 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 [2022-01-31 04:47:13,388 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:47:13,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:47:13,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1067781299, now seen corresponding path program 1 times [2022-01-31 04:47:13,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:47:13,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097906180] [2022-01-31 04:47:13,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:13,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:47:13,398 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:47:13,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125900165] [2022-01-31 04:47:13,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:13,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:13,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:47:13,400 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) [2022-01-31 04:47:13,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 04:47:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 04:47:13,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 04:47:13,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 04:47:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 04:47:13,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 04:47:13,746 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 04:47:13,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 04:47:13,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097906180] [2022-01-31 04:47:13,756 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 04:47:13,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125900165] [2022-01-31 04:47:13,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125900165] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 04:47:13,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 04:47:13,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-31 04:47:13,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811133509] [2022-01-31 04:47:13,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 04:47:13,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 04:47:13,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 04:47:13,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 04:47:13,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-31 04:47:13,758 INFO L87 Difference]: Start difference. First operand 153 states and 197 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 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) [2022-01-31 04:47:14,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 04:47:14,031 INFO L93 Difference]: Finished difference Result 211 states and 278 transitions. [2022-01-31 04:47:14,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 04:47:14,032 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 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 55 [2022-01-31 04:47:14,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 04:47:14,035 INFO L225 Difference]: With dead ends: 211 [2022-01-31 04:47:14,035 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 04:47:14,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2022-01-31 04:47:14,036 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 187 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 04:47:14,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 266 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 04:47:14,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 04:47:14,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2022-01-31 04:47:14,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 145 states have (on average 1.2344827586206897) internal successors, (179), 149 states have internal predecessors, (179), 40 states have call successors, (40), 14 states have call predecessors, (40), 12 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2022-01-31 04:47:14,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 257 transitions. [2022-01-31 04:47:14,067 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 257 transitions. Word has length 55 [2022-01-31 04:47:14,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 04:47:14,068 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 257 transitions. [2022-01-31 04:47:14,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 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) [2022-01-31 04:47:14,068 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 257 transitions. [2022-01-31 04:47:14,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 04:47:14,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:47:14,071 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 04:47:14,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-31 04:47:14,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 04:47:14,285 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:47:14,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:47:14,285 INFO L85 PathProgramCache]: Analyzing trace with hash -304792209, now seen corresponding path program 1 times [2022-01-31 04:47:14,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:47:14,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127516598] [2022-01-31 04:47:14,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:14,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:47:14,294 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:47:14,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1421249748] [2022-01-31 04:47:14,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:14,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:14,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:47:14,296 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 04:47:14,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 04:47:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 04:47:14,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 04:47:14,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 04:47:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-01-31 04:47:14,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 04:47:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-01-31 04:47:14,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 04:47:14,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127516598] [2022-01-31 04:47:14,635 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 04:47:14,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421249748] [2022-01-31 04:47:14,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421249748] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 04:47:14,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 04:47:14,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-01-31 04:47:14,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961774211] [2022-01-31 04:47:14,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 04:47:14,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 04:47:14,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 04:47:14,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 04:47:14,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 04:47:14,636 INFO L87 Difference]: Start difference. First operand 198 states and 257 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-31 04:47:14,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 04:47:14,700 INFO L93 Difference]: Finished difference Result 502 states and 697 transitions. [2022-01-31 04:47:14,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 04:47:14,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 91 [2022-01-31 04:47:14,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 04:47:14,704 INFO L225 Difference]: With dead ends: 502 [2022-01-31 04:47:14,704 INFO L226 Difference]: Without dead ends: 359 [2022-01-31 04:47:14,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 04:47:14,707 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 16 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 04:47:14,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 163 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 04:47:14,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-31 04:47:14,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 342. [2022-01-31 04:47:14,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 255 states have (on average 1.2666666666666666) internal successors, (323), 261 states have internal predecessors, (323), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2022-01-31 04:47:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 469 transitions. [2022-01-31 04:47:14,757 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 469 transitions. Word has length 91 [2022-01-31 04:47:14,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 04:47:14,758 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 469 transitions. [2022-01-31 04:47:14,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-31 04:47:14,759 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 469 transitions. [2022-01-31 04:47:14,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 04:47:14,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:47:14,761 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 04:47:14,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 04:47:14,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 04:47:14,961 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:47:14,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:47:14,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1103092705, now seen corresponding path program 2 times [2022-01-31 04:47:14,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:47:14,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992713020] [2022-01-31 04:47:14,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:14,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:47:14,970 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:47:14,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589849139] [2022-01-31 04:47:14,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 04:47:14,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:14,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:47:14,976 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 04:47:14,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 04:47:15,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 04:47:15,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 04:47:15,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-31 04:47:15,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 04:47:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 04:47:15,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 04:47:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-01-31 04:47:15,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 04:47:15,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992713020] [2022-01-31 04:47:15,539 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 04:47:15,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589849139] [2022-01-31 04:47:15,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589849139] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 04:47:15,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 04:47:15,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-01-31 04:47:15,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448084773] [2022-01-31 04:47:15,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 04:47:15,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 04:47:15,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 04:47:15,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 04:47:15,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-01-31 04:47:15,541 INFO L87 Difference]: Start difference. First operand 342 states and 469 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 18 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) [2022-01-31 04:47:16,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 04:47:16,095 INFO L93 Difference]: Finished difference Result 985 states and 1423 transitions. [2022-01-31 04:47:16,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 04:47:16,096 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 18 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) Word has length 91 [2022-01-31 04:47:16,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 04:47:16,100 INFO L225 Difference]: With dead ends: 985 [2022-01-31 04:47:16,100 INFO L226 Difference]: Without dead ends: 842 [2022-01-31 04:47:16,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=719, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 04:47:16,102 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 369 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 04:47:16,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 447 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 04:47:16,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-01-31 04:47:16,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 793. [2022-01-31 04:47:16,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 597 states have (on average 1.2680067001675042) internal successors, (757), 606 states have internal predecessors, (757), 177 states have call successors, (177), 20 states have call predecessors, (177), 18 states have return successors, (175), 166 states have call predecessors, (175), 175 states have call successors, (175) [2022-01-31 04:47:16,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1109 transitions. [2022-01-31 04:47:16,201 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1109 transitions. Word has length 91 [2022-01-31 04:47:16,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 04:47:16,201 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 1109 transitions. [2022-01-31 04:47:16,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 18 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) [2022-01-31 04:47:16,202 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1109 transitions. [2022-01-31 04:47:16,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 04:47:16,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:47:16,203 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 04:47:16,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 04:47:16,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 04:47:16,423 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:47:16,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:47:16,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1660747519, now seen corresponding path program 1 times [2022-01-31 04:47:16,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:47:16,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181710312] [2022-01-31 04:47:16,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:16,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:47:16,433 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:47:16,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326376715] [2022-01-31 04:47:16,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:16,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:16,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:47:16,434 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 04:47:16,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 04:47:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 04:47:16,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-31 04:47:16,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 04:47:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 04:47:16,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 04:47:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-01-31 04:47:17,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 04:47:17,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181710312] [2022-01-31 04:47:17,095 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 04:47:17,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326376715] [2022-01-31 04:47:17,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326376715] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 04:47:17,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 04:47:17,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-01-31 04:47:17,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185962841] [2022-01-31 04:47:17,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 04:47:17,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 04:47:17,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 04:47:17,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 04:47:17,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 04:47:17,097 INFO L87 Difference]: Start difference. First operand 793 states and 1109 transitions. Second operand has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) [2022-01-31 04:47:17,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 04:47:17,793 INFO L93 Difference]: Finished difference Result 1285 states and 1799 transitions. [2022-01-31 04:47:17,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 04:47:17,794 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) Word has length 97 [2022-01-31 04:47:17,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 04:47:17,800 INFO L225 Difference]: With dead ends: 1285 [2022-01-31 04:47:17,801 INFO L226 Difference]: Without dead ends: 795 [2022-01-31 04:47:17,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=1056, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 04:47:17,804 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 479 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 04:47:17,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 530 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 04:47:17,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-01-31 04:47:17,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 740. [2022-01-31 04:47:17,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 553 states have (on average 1.2206148282097649) internal successors, (675), 557 states have internal predecessors, (675), 164 states have call successors, (164), 24 states have call predecessors, (164), 22 states have return successors, (162), 158 states have call predecessors, (162), 162 states have call successors, (162) [2022-01-31 04:47:17,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1001 transitions. [2022-01-31 04:47:17,898 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1001 transitions. Word has length 97 [2022-01-31 04:47:17,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 04:47:17,898 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 1001 transitions. [2022-01-31 04:47:17,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) [2022-01-31 04:47:17,899 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1001 transitions. [2022-01-31 04:47:17,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 04:47:17,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:47:17,900 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 04:47:17,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-31 04:47:18,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 04:47:18,115 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:47:18,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:47:18,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1761003221, now seen corresponding path program 1 times [2022-01-31 04:47:18,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:47:18,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340532589] [2022-01-31 04:47:18,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:18,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:47:18,124 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:47:18,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1211286005] [2022-01-31 04:47:18,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:18,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:18,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:47:18,126 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 04:47:18,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 04:47:18,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 04:47:18,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 04:47:18,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 04:47:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 04:47:18,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 04:47:18,727 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-01-31 04:47:18,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 04:47:18,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340532589] [2022-01-31 04:47:18,727 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 04:47:18,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211286005] [2022-01-31 04:47:18,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211286005] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 04:47:18,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 04:47:18,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-01-31 04:47:18,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617822050] [2022-01-31 04:47:18,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 04:47:18,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 04:47:18,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 04:47:18,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 04:47:18,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 04:47:18,729 INFO L87 Difference]: Start difference. First operand 740 states and 1001 transitions. Second operand has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 26 states have internal predecessors, (114), 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) [2022-01-31 04:47:19,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 04:47:19,483 INFO L93 Difference]: Finished difference Result 850 states and 1161 transitions. [2022-01-31 04:47:19,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 04:47:19,484 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 26 states have internal predecessors, (114), 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 103 [2022-01-31 04:47:19,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 04:47:19,488 INFO L225 Difference]: With dead ends: 850 [2022-01-31 04:47:19,488 INFO L226 Difference]: Without dead ends: 845 [2022-01-31 04:47:19,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=670, Invalid=1222, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 04:47:19,489 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 656 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 04:47:19,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 523 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 04:47:19,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-01-31 04:47:19,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 830. [2022-01-31 04:47:19,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 621 states have (on average 1.1996779388083736) internal successors, (745), 627 states have internal predecessors, (745), 184 states have call successors, (184), 26 states have call predecessors, (184), 24 states have return successors, (182), 176 states have call predecessors, (182), 182 states have call successors, (182) [2022-01-31 04:47:19,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1111 transitions. [2022-01-31 04:47:19,564 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1111 transitions. Word has length 103 [2022-01-31 04:47:19,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 04:47:19,564 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 1111 transitions. [2022-01-31 04:47:19,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 26 states have internal predecessors, (114), 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) [2022-01-31 04:47:19,565 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1111 transitions. [2022-01-31 04:47:19,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-31 04:47:19,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:47:19,568 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 9, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 04:47:19,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 04:47:19,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:19,787 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:47:19,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:47:19,788 INFO L85 PathProgramCache]: Analyzing trace with hash -599363247, now seen corresponding path program 3 times [2022-01-31 04:47:19,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:47:19,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559521077] [2022-01-31 04:47:19,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:19,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:47:19,798 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:47:19,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510499296] [2022-01-31 04:47:19,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 04:47:19,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:19,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:47:19,800 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 04:47:19,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 04:47:19,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 04:47:19,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 04:47:19,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 04:47:19,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 04:47:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 263 proven. 0 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2022-01-31 04:47:20,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 04:47:20,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 04:47:20,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559521077] [2022-01-31 04:47:20,073 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 04:47:20,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510499296] [2022-01-31 04:47:20,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510499296] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 04:47:20,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 04:47:20,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 04:47:20,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246648945] [2022-01-31 04:47:20,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 04:47:20,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 04:47:20,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 04:47:20,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 04:47:20,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 04:47:20,074 INFO L87 Difference]: Start difference. First operand 830 states and 1111 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-31 04:47:20,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 04:47:20,169 INFO L93 Difference]: Finished difference Result 1103 states and 1482 transitions. [2022-01-31 04:47:20,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 04:47:20,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 181 [2022-01-31 04:47:20,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 04:47:20,173 INFO L225 Difference]: With dead ends: 1103 [2022-01-31 04:47:20,173 INFO L226 Difference]: Without dead ends: 896 [2022-01-31 04:47:20,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 04:47:20,175 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 04:47:20,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 194 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 04:47:20,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-01-31 04:47:20,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 861. [2022-01-31 04:47:20,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 645 states have (on average 1.1767441860465115) internal successors, (759), 652 states have internal predecessors, (759), 186 states have call successors, (186), 31 states have call predecessors, (186), 29 states have return successors, (184), 177 states have call predecessors, (184), 184 states have call successors, (184) [2022-01-31 04:47:20,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1129 transitions. [2022-01-31 04:47:20,256 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1129 transitions. Word has length 181 [2022-01-31 04:47:20,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 04:47:20,256 INFO L470 AbstractCegarLoop]: Abstraction has 861 states and 1129 transitions. [2022-01-31 04:47:20,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-31 04:47:20,256 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1129 transitions. [2022-01-31 04:47:20,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 04:47:20,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:47:20,260 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 9, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 04:47:20,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-31 04:47:20,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 04:47:20,475 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:47:20,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:47:20,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1408642227, now seen corresponding path program 4 times [2022-01-31 04:47:20,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:47:20,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681962718] [2022-01-31 04:47:20,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:20,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:47:20,486 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:47:20,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381083621] [2022-01-31 04:47:20,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 04:47:20,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:20,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:47:20,492 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 04:47:20,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 04:47:20,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 04:47:20,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 04:47:20,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 04:47:20,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 04:47:20,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 604 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2022-01-31 04:47:20,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 04:47:20,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 04:47:20,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681962718] [2022-01-31 04:47:20,803 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 04:47:20,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381083621] [2022-01-31 04:47:20,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381083621] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 04:47:20,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 04:47:20,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 04:47:20,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706262094] [2022-01-31 04:47:20,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 04:47:20,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 04:47:20,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 04:47:20,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 04:47:20,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 04:47:20,805 INFO L87 Difference]: Start difference. First operand 861 states and 1129 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-31 04:47:20,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 04:47:20,911 INFO L93 Difference]: Finished difference Result 1462 states and 1917 transitions. [2022-01-31 04:47:20,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 04:47:20,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 187 [2022-01-31 04:47:20,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 04:47:20,920 INFO L225 Difference]: With dead ends: 1462 [2022-01-31 04:47:20,920 INFO L226 Difference]: Without dead ends: 919 [2022-01-31 04:47:20,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 04:47:20,924 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 3 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 04:47:20,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 86 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 04:47:20,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-01-31 04:47:21,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 867. [2022-01-31 04:47:21,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 651 states have (on average 1.1751152073732718) internal successors, (765), 660 states have internal predecessors, (765), 186 states have call successors, (186), 31 states have call predecessors, (186), 29 states have return successors, (184), 175 states have call predecessors, (184), 184 states have call successors, (184) [2022-01-31 04:47:21,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1135 transitions. [2022-01-31 04:47:21,014 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1135 transitions. Word has length 187 [2022-01-31 04:47:21,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 04:47:21,015 INFO L470 AbstractCegarLoop]: Abstraction has 867 states and 1135 transitions. [2022-01-31 04:47:21,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-31 04:47:21,015 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1135 transitions. [2022-01-31 04:47:21,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 04:47:21,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:47:21,018 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 10, 9, 9, 9, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 04:47:21,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-31 04:47:21,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 04:47:21,234 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:47:21,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:47:21,234 INFO L85 PathProgramCache]: Analyzing trace with hash -464040263, now seen corresponding path program 5 times [2022-01-31 04:47:21,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:47:21,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455336833] [2022-01-31 04:47:21,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:21,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:47:21,244 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:47:21,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [674844885] [2022-01-31 04:47:21,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 04:47:21,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:21,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:47:21,246 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 04:47:21,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-31 04:47:21,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-31 04:47:21,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 04:47:21,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 04:47:21,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 04:47:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 753 trivial. 0 not checked. [2022-01-31 04:47:21,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 04:47:21,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 04:47:21,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455336833] [2022-01-31 04:47:21,898 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 04:47:21,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674844885] [2022-01-31 04:47:21,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674844885] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 04:47:21,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 04:47:21,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 04:47:21,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299782029] [2022-01-31 04:47:21,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 04:47:21,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 04:47:21,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 04:47:21,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 04:47:21,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 04:47:21,899 INFO L87 Difference]: Start difference. First operand 867 states and 1135 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 04:47:21,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 04:47:21,990 INFO L93 Difference]: Finished difference Result 887 states and 1154 transitions. [2022-01-31 04:47:21,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 04:47:21,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 187 [2022-01-31 04:47:21,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 04:47:21,997 INFO L225 Difference]: With dead ends: 887 [2022-01-31 04:47:21,997 INFO L226 Difference]: Without dead ends: 831 [2022-01-31 04:47:21,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 04:47:21,998 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 04:47:21,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 143 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 04:47:21,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-01-31 04:47:22,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 806. [2022-01-31 04:47:22,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 604 states have (on average 1.1688741721854305) internal successors, (706), 612 states have internal predecessors, (706), 177 states have call successors, (177), 26 states have call predecessors, (177), 24 states have return successors, (175), 167 states have call predecessors, (175), 175 states have call successors, (175) [2022-01-31 04:47:22,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1058 transitions. [2022-01-31 04:47:22,074 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1058 transitions. Word has length 187 [2022-01-31 04:47:22,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 04:47:22,075 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 1058 transitions. [2022-01-31 04:47:22,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 04:47:22,075 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1058 transitions. [2022-01-31 04:47:22,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 04:47:22,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:47:22,078 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 9, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 04:47:22,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-31 04:47:22,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-31 04:47:22,284 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:47:22,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:47:22,285 INFO L85 PathProgramCache]: Analyzing trace with hash 372440269, now seen corresponding path program 6 times [2022-01-31 04:47:22,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:47:22,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060203204] [2022-01-31 04:47:22,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:22,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:47:22,306 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:47:22,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [802196710] [2022-01-31 04:47:22,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 04:47:22,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:22,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:47:22,309 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 04:47:22,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-31 04:47:22,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-31 04:47:22,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 04:47:22,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 04:47:22,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 04:47:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2022-01-31 04:47:22,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 04:47:22,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 04:47:22,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060203204] [2022-01-31 04:47:22,743 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 04:47:22,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802196710] [2022-01-31 04:47:22,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802196710] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 04:47:22,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 04:47:22,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 04:47:22,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557491680] [2022-01-31 04:47:22,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 04:47:22,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 04:47:22,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 04:47:22,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 04:47:22,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-31 04:47:22,744 INFO L87 Difference]: Start difference. First operand 806 states and 1058 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-31 04:47:22,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 04:47:22,839 INFO L93 Difference]: Finished difference Result 853 states and 1107 transitions. [2022-01-31 04:47:22,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 04:47:22,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 187 [2022-01-31 04:47:22,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 04:47:22,845 INFO L225 Difference]: With dead ends: 853 [2022-01-31 04:47:22,845 INFO L226 Difference]: Without dead ends: 782 [2022-01-31 04:47:22,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-31 04:47:22,846 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 12 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 04:47:22,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 134 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 04:47:22,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-01-31 04:47:22,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 755. [2022-01-31 04:47:22,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 566 states have (on average 1.1625441696113075) internal successors, (658), 573 states have internal predecessors, (658), 164 states have call successors, (164), 26 states have call predecessors, (164), 24 states have return successors, (162), 155 states have call predecessors, (162), 162 states have call successors, (162) [2022-01-31 04:47:22,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 984 transitions. [2022-01-31 04:47:22,913 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 984 transitions. Word has length 187 [2022-01-31 04:47:22,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 04:47:22,916 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 984 transitions. [2022-01-31 04:47:22,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-31 04:47:22,916 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 984 transitions. [2022-01-31 04:47:22,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 04:47:22,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:47:22,919 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 04:47:22,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-31 04:47:23,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 04:47:23,125 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:47:23,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:47:23,126 INFO L85 PathProgramCache]: Analyzing trace with hash -288806385, now seen corresponding path program 7 times [2022-01-31 04:47:23,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:47:23,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123809090] [2022-01-31 04:47:23,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:23,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:47:23,135 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:47:23,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886533118] [2022-01-31 04:47:23,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 04:47:23,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:23,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:47:23,143 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 04:47:23,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-31 04:47:23,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 04:47:23,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 04:47:23,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 04:47:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 280 proven. 184 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2022-01-31 04:47:23,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 04:47:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 140 proven. 184 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-01-31 04:47:23,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 04:47:23,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123809090] [2022-01-31 04:47:23,867 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 04:47:23,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886533118] [2022-01-31 04:47:23,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886533118] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 04:47:23,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 04:47:23,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2022-01-31 04:47:23,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303883069] [2022-01-31 04:47:23,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 04:47:23,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 04:47:23,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 04:47:23,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 04:47:23,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-31 04:47:23,869 INFO L87 Difference]: Start difference. First operand 755 states and 984 transitions. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-01-31 04:47:24,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 04:47:24,451 INFO L93 Difference]: Finished difference Result 1720 states and 2275 transitions. [2022-01-31 04:47:24,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 04:47:24,451 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) Word has length 187 [2022-01-31 04:47:24,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 04:47:24,457 INFO L225 Difference]: With dead ends: 1720 [2022-01-31 04:47:24,457 INFO L226 Difference]: Without dead ends: 1523 [2022-01-31 04:47:24,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 363 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-01-31 04:47:24,459 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 151 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 04:47:24,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1094 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 04:47:24,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2022-01-31 04:47:24,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 1314. [2022-01-31 04:47:24,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 986 states have (on average 1.1795131845841784) internal successors, (1163), 1002 states have internal predecessors, (1163), 303 states have call successors, (303), 26 states have call predecessors, (303), 24 states have return successors, (301), 285 states have call predecessors, (301), 301 states have call successors, (301) [2022-01-31 04:47:24,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 1767 transitions. [2022-01-31 04:47:24,604 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 1767 transitions. Word has length 187 [2022-01-31 04:47:24,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 04:47:24,605 INFO L470 AbstractCegarLoop]: Abstraction has 1314 states and 1767 transitions. [2022-01-31 04:47:24,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-01-31 04:47:24,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 1767 transitions. [2022-01-31 04:47:24,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 04:47:24,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:47:24,610 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 10, 9, 9, 9, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 04:47:24,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-31 04:47:24,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:24,823 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:47:24,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:47:24,824 INFO L85 PathProgramCache]: Analyzing trace with hash -719610275, now seen corresponding path program 8 times [2022-01-31 04:47:24,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:47:24,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935217608] [2022-01-31 04:47:24,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:24,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:47:24,833 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:47:24,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230951530] [2022-01-31 04:47:24,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 04:47:24,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:24,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:47:24,835 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 04:47:24,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-31 04:47:24,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 04:47:24,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 04:47:24,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 04:47:24,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 04:47:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 516 proven. 84 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-01-31 04:47:25,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 04:47:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 226 proven. 84 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2022-01-31 04:47:25,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 04:47:25,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935217608] [2022-01-31 04:47:25,592 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 04:47:25,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230951530] [2022-01-31 04:47:25,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230951530] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 04:47:25,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 04:47:25,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-31 04:47:25,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039913564] [2022-01-31 04:47:25,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 04:47:25,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 04:47:25,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 04:47:25,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 04:47:25,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-01-31 04:47:25,594 INFO L87 Difference]: Start difference. First operand 1314 states and 1767 transitions. Second operand has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 14 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 14 states have call predecessors, (36), 14 states have call successors, (36) [2022-01-31 04:47:26,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 04:47:26,556 INFO L93 Difference]: Finished difference Result 2714 states and 3675 transitions. [2022-01-31 04:47:26,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 04:47:26,557 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 14 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 14 states have call predecessors, (36), 14 states have call successors, (36) Word has length 187 [2022-01-31 04:47:26,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 04:47:26,568 INFO L225 Difference]: With dead ends: 2714 [2022-01-31 04:47:26,568 INFO L226 Difference]: Without dead ends: 2417 [2022-01-31 04:47:26,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=385, Invalid=1097, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 04:47:26,570 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 232 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 04:47:26,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 972 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 04:47:26,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2022-01-31 04:47:26,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1968. [2022-01-31 04:47:26,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1475 states have (on average 1.1627118644067798) internal successors, (1715), 1503 states have internal predecessors, (1715), 468 states have call successors, (468), 26 states have call predecessors, (468), 24 states have return successors, (466), 438 states have call predecessors, (466), 466 states have call successors, (466) [2022-01-31 04:47:26,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2649 transitions. [2022-01-31 04:47:26,846 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2649 transitions. Word has length 187 [2022-01-31 04:47:26,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 04:47:26,846 INFO L470 AbstractCegarLoop]: Abstraction has 1968 states and 2649 transitions. [2022-01-31 04:47:26,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 14 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 14 states have call predecessors, (36), 14 states have call successors, (36) [2022-01-31 04:47:26,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2649 transitions. [2022-01-31 04:47:26,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 04:47:26,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:47:26,853 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 04:47:26,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-31 04:47:27,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:27,077 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:47:27,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:47:27,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1188230671, now seen corresponding path program 9 times [2022-01-31 04:47:27,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:47:27,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960445492] [2022-01-31 04:47:27,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:27,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:47:27,092 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:47:27,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008198831] [2022-01-31 04:47:27,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 04:47:27,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:27,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:47:27,095 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 04:47:27,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-31 04:47:27,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-31 04:47:27,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 04:47:27,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 04:47:27,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 04:47:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 84 proven. 248 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-01-31 04:47:28,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 04:47:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 84 proven. 248 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-01-31 04:47:28,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 04:47:28,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960445492] [2022-01-31 04:47:28,538 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 04:47:28,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008198831] [2022-01-31 04:47:28,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008198831] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 04:47:28,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 04:47:28,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-01-31 04:47:28,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816058409] [2022-01-31 04:47:28,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 04:47:28,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 04:47:28,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 04:47:28,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 04:47:28,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-01-31 04:47:28,540 INFO L87 Difference]: Start difference. First operand 1968 states and 2649 transitions. Second operand has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 18 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33) [2022-01-31 04:47:30,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 04:47:30,307 INFO L93 Difference]: Finished difference Result 3252 states and 4395 transitions. [2022-01-31 04:47:30,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 04:47:30,307 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 18 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33) Word has length 187 [2022-01-31 04:47:30,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 04:47:30,318 INFO L225 Difference]: With dead ends: 3252 [2022-01-31 04:47:30,319 INFO L226 Difference]: Without dead ends: 2993 [2022-01-31 04:47:30,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 356 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=507, Invalid=2573, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 04:47:30,321 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 274 mSDsluCounter, 2394 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 2726 SdHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 04:47:30,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 2726 Invalid, 1564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1369 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 04:47:30,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2022-01-31 04:47:30,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 2462. [2022-01-31 04:47:30,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 1845 states have (on average 1.1718157181571816) internal successors, (2162), 1887 states have internal predecessors, (2162), 592 states have call successors, (592), 26 states have call predecessors, (592), 24 states have return successors, (590), 548 states have call predecessors, (590), 590 states have call successors, (590) [2022-01-31 04:47:30,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 3344 transitions. [2022-01-31 04:47:30,720 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 3344 transitions. Word has length 187 [2022-01-31 04:47:30,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 04:47:30,721 INFO L470 AbstractCegarLoop]: Abstraction has 2462 states and 3344 transitions. [2022-01-31 04:47:30,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 18 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33) [2022-01-31 04:47:30,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 3344 transitions. [2022-01-31 04:47:30,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 04:47:30,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:47:30,730 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 04:47:30,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-31 04:47:30,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:30,938 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:47:30,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:47:30,938 INFO L85 PathProgramCache]: Analyzing trace with hash 2070462991, now seen corresponding path program 10 times [2022-01-31 04:47:30,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:47:30,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236081851] [2022-01-31 04:47:30,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:30,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:47:30,952 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:47:30,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772305726] [2022-01-31 04:47:30,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 04:47:30,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:30,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:47:30,954 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 04:47:30,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-31 04:47:31,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 04:47:31,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 04:47:31,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-31 04:47:31,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 04:47:31,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 1044 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 04:47:31,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 04:47:32,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 284 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-01-31 04:47:32,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 04:47:32,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236081851] [2022-01-31 04:47:32,407 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 04:47:32,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772305726] [2022-01-31 04:47:32,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772305726] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 04:47:32,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 04:47:32,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-01-31 04:47:32,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822992537] [2022-01-31 04:47:32,407 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 04:47:32,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 04:47:32,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 04:47:32,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 04:47:32,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 04:47:32,409 INFO L87 Difference]: Start difference. First operand 2462 states and 3344 transitions. Second operand has 46 states, 46 states have (on average 4.521739130434782) internal successors, (208), 46 states have internal predecessors, (208), 44 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (46), 42 states have call predecessors, (46), 43 states have call successors, (46) [2022-01-31 04:47:35,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 04:47:35,347 INFO L93 Difference]: Finished difference Result 9906 states and 14925 transitions. [2022-01-31 04:47:35,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 04:47:35,348 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.521739130434782) internal successors, (208), 46 states have internal predecessors, (208), 44 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (46), 42 states have call predecessors, (46), 43 states have call successors, (46) Word has length 187 [2022-01-31 04:47:35,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 04:47:35,396 INFO L225 Difference]: With dead ends: 9906 [2022-01-31 04:47:35,397 INFO L226 Difference]: Without dead ends: 9897 [2022-01-31 04:47:35,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2691, Invalid=4619, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 04:47:35,404 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 1412 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 990 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1412 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 990 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 04:47:35,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1412 Valid, 879 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [990 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 04:47:35,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9897 states. [2022-01-31 04:47:36,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9897 to 9645. [2022-01-31 04:47:36,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9645 states, 7245 states have (on average 1.2641821946169771) internal successors, (9159), 7308 states have internal predecessors, (9159), 2355 states have call successors, (2355), 46 states have call predecessors, (2355), 44 states have return successors, (2353), 2290 states have call predecessors, (2353), 2353 states have call successors, (2353) [2022-01-31 04:47:36,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9645 states to 9645 states and 13867 transitions. [2022-01-31 04:47:36,739 INFO L78 Accepts]: Start accepts. Automaton has 9645 states and 13867 transitions. Word has length 187 [2022-01-31 04:47:36,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 04:47:36,740 INFO L470 AbstractCegarLoop]: Abstraction has 9645 states and 13867 transitions. [2022-01-31 04:47:36,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.521739130434782) internal successors, (208), 46 states have internal predecessors, (208), 44 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (46), 42 states have call predecessors, (46), 43 states have call successors, (46) [2022-01-31 04:47:36,741 INFO L276 IsEmpty]: Start isEmpty. Operand 9645 states and 13867 transitions. [2022-01-31 04:47:36,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-31 04:47:36,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:47:36,750 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 10, 10, 10, 10, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 04:47:36,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-31 04:47:36,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:36,963 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:47:36,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:47:36,964 INFO L85 PathProgramCache]: Analyzing trace with hash 179284923, now seen corresponding path program 2 times [2022-01-31 04:47:36,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:47:36,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911266780] [2022-01-31 04:47:36,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:36,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:47:36,973 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:47:36,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614847956] [2022-01-31 04:47:36,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 04:47:36,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:36,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:47:36,974 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 04:47:36,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-31 04:47:37,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 04:47:37,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 04:47:37,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-31 04:47:37,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 04:47:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 1142 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 04:47:37,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 04:47:38,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 302 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-01-31 04:47:38,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 04:47:38,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911266780] [2022-01-31 04:47:38,255 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 04:47:38,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614847956] [2022-01-31 04:47:38,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614847956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 04:47:38,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 04:47:38,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-01-31 04:47:38,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821548242] [2022-01-31 04:47:38,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 04:47:38,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 04:47:38,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 04:47:38,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 04:47:38,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 04:47:38,258 INFO L87 Difference]: Start difference. First operand 9645 states and 13867 transitions. Second operand has 48 states, 48 states have (on average 4.479166666666667) internal successors, (215), 48 states have internal predecessors, (215), 46 states have call successors, (50), 25 states have call predecessors, (50), 24 states have return successors, (48), 44 states have call predecessors, (48), 45 states have call successors, (48) [2022-01-31 04:47:41,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 04:47:41,047 INFO L93 Difference]: Finished difference Result 14792 states and 21463 transitions. [2022-01-31 04:47:41,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 04:47:41,048 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.479166666666667) internal successors, (215), 48 states have internal predecessors, (215), 46 states have call successors, (50), 25 states have call predecessors, (50), 24 states have return successors, (48), 44 states have call predecessors, (48), 45 states have call successors, (48) Word has length 193 [2022-01-31 04:47:41,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 04:47:41,071 INFO L225 Difference]: With dead ends: 14792 [2022-01-31 04:47:41,071 INFO L226 Difference]: Without dead ends: 7697 [2022-01-31 04:47:41,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2864, Invalid=4968, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 04:47:41,094 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 1386 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 995 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1386 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 1738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 995 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 04:47:41,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1386 Valid, 1018 Invalid, 1738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [995 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 04:47:41,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7697 states. [2022-01-31 04:47:42,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7697 to 7470. [2022-01-31 04:47:42,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7470 states, 5600 states have (on average 1.1821428571428572) internal successors, (6620), 5644 states have internal predecessors, (6620), 1823 states have call successors, (1823), 48 states have call predecessors, (1823), 46 states have return successors, (1821), 1777 states have call predecessors, (1821), 1821 states have call successors, (1821) [2022-01-31 04:47:42,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7470 states to 7470 states and 10264 transitions. [2022-01-31 04:47:42,071 INFO L78 Accepts]: Start accepts. Automaton has 7470 states and 10264 transitions. Word has length 193 [2022-01-31 04:47:42,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 04:47:42,071 INFO L470 AbstractCegarLoop]: Abstraction has 7470 states and 10264 transitions. [2022-01-31 04:47:42,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.479166666666667) internal successors, (215), 48 states have internal predecessors, (215), 46 states have call successors, (50), 25 states have call predecessors, (50), 24 states have return successors, (48), 44 states have call predecessors, (48), 45 states have call successors, (48) [2022-01-31 04:47:42,072 INFO L276 IsEmpty]: Start isEmpty. Operand 7470 states and 10264 transitions. [2022-01-31 04:47:42,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-31 04:47:42,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:47:42,082 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 10, 10, 10, 10, 8, 8, 8, 8, 6, 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] [2022-01-31 04:47:42,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-31 04:47:42,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:42,304 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:47:42,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:47:42,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1172412185, now seen corresponding path program 2 times [2022-01-31 04:47:42,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:47:42,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907175416] [2022-01-31 04:47:42,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:42,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:47:42,316 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:47:42,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134028706] [2022-01-31 04:47:42,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 04:47:42,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:42,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:47:42,318 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 04:47:42,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-31 04:47:42,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 04:47:42,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 04:47:42,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 04:47:42,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 04:47:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 1248 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 04:47:42,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 04:47:43,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 324 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-01-31 04:47:43,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 04:47:43,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907175416] [2022-01-31 04:47:43,694 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 04:47:43,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134028706] [2022-01-31 04:47:43,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134028706] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 04:47:43,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 04:47:43,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-01-31 04:47:43,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567266722] [2022-01-31 04:47:43,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 04:47:43,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 04:47:43,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 04:47:43,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 04:47:43,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 04:47:43,697 INFO L87 Difference]: Start difference. First operand 7470 states and 10264 transitions. Second operand has 50 states, 50 states have (on average 4.44) internal successors, (222), 50 states have internal predecessors, (222), 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) [2022-01-31 04:47:46,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 04:47:46,498 INFO L93 Difference]: Finished difference Result 8076 states and 11149 transitions. [2022-01-31 04:47:46,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 04:47:46,498 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.44) internal successors, (222), 50 states have internal predecessors, (222), 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 199 [2022-01-31 04:47:46,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 04:47:46,516 INFO L225 Difference]: With dead ends: 8076 [2022-01-31 04:47:46,516 INFO L226 Difference]: Without dead ends: 7927 [2022-01-31 04:47:46,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3046, Invalid=5326, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 04:47:46,521 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 1526 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 1054 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1526 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1054 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 04:47:46,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1526 Valid, 1003 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1054 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 04:47:46,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2022-01-31 04:47:47,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 7220. [2022-01-31 04:47:47,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7220 states, 5413 states have (on average 1.1211897284315537) internal successors, (6069), 5457 states have internal predecessors, (6069), 1758 states have call successors, (1758), 50 states have call predecessors, (1758), 48 states have return successors, (1756), 1712 states have call predecessors, (1756), 1756 states have call successors, (1756) [2022-01-31 04:47:47,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7220 states to 7220 states and 9583 transitions. [2022-01-31 04:47:47,303 INFO L78 Accepts]: Start accepts. Automaton has 7220 states and 9583 transitions. Word has length 199 [2022-01-31 04:47:47,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 04:47:47,303 INFO L470 AbstractCegarLoop]: Abstraction has 7220 states and 9583 transitions. [2022-01-31 04:47:47,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.44) internal successors, (222), 50 states have internal predecessors, (222), 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) [2022-01-31 04:47:47,304 INFO L276 IsEmpty]: Start isEmpty. Operand 7220 states and 9583 transitions. [2022-01-31 04:47:47,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-01-31 04:47:47,328 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:47:47,328 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 04:47:47,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-31 04:47:47,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:47,541 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:47:47,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:47:47,541 INFO L85 PathProgramCache]: Analyzing trace with hash -2044709741, now seen corresponding path program 11 times [2022-01-31 04:47:47,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:47:47,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858100873] [2022-01-31 04:47:47,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:47:47,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:47:47,561 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:47:47,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371749205] [2022-01-31 04:47:47,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 04:47:47,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:47:47,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:47:47,563 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 04:47:47,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-31 04:47:48,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-01-31 04:47:48,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 04:47:48,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-31 04:47:48,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 04:48:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5272 backedges. 480 proven. 968 refuted. 24 times theorem prover too weak. 3800 trivial. 0 not checked. [2022-01-31 04:48:31,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 04:55:06,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 04:55:06,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858100873] [2022-01-31 04:55:06,579 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 04:55:06,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371749205] [2022-01-31 04:55:06,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371749205] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 04:55:06,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 04:55:06,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-01-31 04:55:06,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689219512] [2022-01-31 04:55:06,579 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 04:55:06,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 04:55:06,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 04:55:06,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 04:55:06,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=844, Unknown=18, NotChecked=0, Total=1122 [2022-01-31 04:55:06,581 INFO L87 Difference]: Start difference. First operand 7220 states and 9583 transitions. Second operand has 19 states, 19 states have (on average 7.578947368421052) internal successors, (144), 19 states have internal predecessors, (144), 19 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 18 states have call predecessors, (44), 18 states have call successors, (44) [2022-01-31 04:55:51,349 WARN L228 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 58 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 04:56:01,423 WARN L228 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 56 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 04:56:14,362 WARN L228 SmtUtils]: Spent 8.39s on a formula simplification. DAG size of input: 77 DAG size of output: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 04:56:27,848 WARN L228 SmtUtils]: Spent 7.50s on a formula simplification. DAG size of input: 63 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 04:57:08,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 04:57:08,838 INFO L93 Difference]: Finished difference Result 15376 states and 20636 transitions. [2022-01-31 04:57:08,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 04:57:08,839 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 7.578947368421052) internal successors, (144), 19 states have internal predecessors, (144), 19 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 18 states have call predecessors, (44), 18 states have call successors, (44) Word has length 379 [2022-01-31 04:57:08,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 04:57:08,877 INFO L225 Difference]: With dead ends: 15376 [2022-01-31 04:57:08,878 INFO L226 Difference]: Without dead ends: 15094 [2022-01-31 04:57:08,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 636 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 160.5s TimeCoverageRelationStatistics Valid=916, Invalid=3079, Unknown=37, NotChecked=0, Total=4032 [2022-01-31 04:57:08,889 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 280 mSDsluCounter, 3463 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 3781 SdHoareTripleChecker+Invalid, 2056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1081 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 04:57:08,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 3781 Invalid, 2056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 939 Invalid, 0 Unknown, 1081 Unchecked, 1.0s Time] [2022-01-31 04:57:08,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15094 states. [2022-01-31 04:57:10,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15094 to 14181. [2022-01-31 04:57:10,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14181 states, 10637 states have (on average 1.1329322177305632) internal successors, (12051), 10738 states have internal predecessors, (12051), 3495 states have call successors, (3495), 50 states have call predecessors, (3495), 48 states have return successors, (3493), 3392 states have call predecessors, (3493), 3493 states have call successors, (3493) [2022-01-31 04:57:10,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14181 states to 14181 states and 19039 transitions. [2022-01-31 04:57:10,908 INFO L78 Accepts]: Start accepts. Automaton has 14181 states and 19039 transitions. Word has length 379 [2022-01-31 04:57:10,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 04:57:10,909 INFO L470 AbstractCegarLoop]: Abstraction has 14181 states and 19039 transitions. [2022-01-31 04:57:10,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.578947368421052) internal successors, (144), 19 states have internal predecessors, (144), 19 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 18 states have call predecessors, (44), 18 states have call successors, (44) [2022-01-31 04:57:10,909 INFO L276 IsEmpty]: Start isEmpty. Operand 14181 states and 19039 transitions. [2022-01-31 04:57:10,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-01-31 04:57:10,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 04:57:10,956 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 04:57:10,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-01-31 04:57:11,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-31 04:57:11,171 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 04:57:11,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 04:57:11,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1162477421, now seen corresponding path program 12 times [2022-01-31 04:57:11,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 04:57:11,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108098183] [2022-01-31 04:57:11,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 04:57:11,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 04:57:11,182 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 04:57:11,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [339397915] [2022-01-31 04:57:11,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 04:57:11,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 04:57:11,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 04:57:11,185 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 04:57:11,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-31 04:57:24,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-01-31 04:57:24,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 04:57:24,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 67 conjunts are in the unsatisfiable core [2022-01-31 04:57:24,333 INFO L286 TraceCheckSpWp]: Computing forward predicates...