/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/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 04:46:19,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 04:46:19,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 04:46:19,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 04:46:19,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 04:46:19,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 04:46:19,107 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 04:46:19,109 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 04:46:19,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 04:46:19,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 04:46:19,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 04:46:19,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 04:46:19,120 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 04:46:19,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 04:46:19,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 04:46:19,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 04:46:19,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 04:46:19,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 04:46:19,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 04:46:19,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 04:46:19,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 04:46:19,139 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 04:46:19,149 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 04:46:19,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 04:46:19,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 04:46:19,152 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 04:46:19,152 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 04:46:19,153 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 04:46:19,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 04:46:19,153 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 04:46:19,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 04:46:19,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 04:46:19,154 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 04:46:19,154 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 04:46:19,154 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 04:46:19,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 04:46:19,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 04:46:19,154 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 04:46:19,155 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 04:46:19,155 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 04:46:19,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 04:46:19,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 04:46:19,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 04:46:19,155 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 04:46:19,155 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 04:46:19,155 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 04:46:19,156 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 04:46:19,156 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 04:46:19,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 04:46:19,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 04:46:19,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 04:46:19,357 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 04:46:19,358 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 04:46:19,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound100.c [2022-03-19 04:46:19,407 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dfa87046/6b33ed94cfe442f1a51d6162137af486/FLAG214af97f9 [2022-03-19 04:46:19,762 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 04:46:19,762 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound100.c [2022-03-19 04:46:19,766 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dfa87046/6b33ed94cfe442f1a51d6162137af486/FLAG214af97f9 [2022-03-19 04:46:19,774 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dfa87046/6b33ed94cfe442f1a51d6162137af486 [2022-03-19 04:46:19,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 04:46:19,776 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 04:46:19,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 04:46:19,777 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 04:46:19,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 04:46:19,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 04:46:19" (1/1) ... [2022-03-19 04:46:19,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d1f85ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:46:19, skipping insertion in model container [2022-03-19 04:46:19,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 04:46:19" (1/1) ... [2022-03-19 04:46:19,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 04:46:19,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 04:46:19,909 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] [2022-03-19 04:46:19,926 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 04:46:19,932 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 04:46:19,940 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] [2022-03-19 04:46:19,945 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 04:46:19,954 INFO L208 MainTranslator]: Completed translation [2022-03-19 04:46:19,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:46:19 WrapperNode [2022-03-19 04:46:19,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 04:46:19,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 04:46:19,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 04:46:19,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 04:46:19,966 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:46:19" (1/1) ... [2022-03-19 04:46:19,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:46:19" (1/1) ... [2022-03-19 04:46:19,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:46:19" (1/1) ... [2022-03-19 04:46:19,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:46:19" (1/1) ... [2022-03-19 04:46:19,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:46:19" (1/1) ... [2022-03-19 04:46:19,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:46:19" (1/1) ... [2022-03-19 04:46:19,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:46:19" (1/1) ... [2022-03-19 04:46:19,984 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 04:46:19,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 04:46:19,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 04:46:19,985 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 04:46:19,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:46:19" (1/1) ... [2022-03-19 04:46:19,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 04:46:20,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:20,041 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 04:46:20,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 04:46:20,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 04:46:20,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 04:46:20,112 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 04:46:20,113 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 04:46:20,113 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 04:46:20,113 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 04:46:20,113 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 04:46:20,113 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 04:46:20,113 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 04:46:20,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 04:46:20,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 04:46:20,113 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 04:46:20,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 04:46:20,113 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 04:46:20,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 04:46:20,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 04:46:20,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 04:46:20,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 04:46:20,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 04:46:20,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 04:46:20,168 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 04:46:20,170 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 04:46:20,265 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 04:46:20,281 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 04:46:20,281 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-19 04:46:20,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 04:46:20 BoogieIcfgContainer [2022-03-19 04:46:20,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 04:46:20,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 04:46:20,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 04:46:20,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 04:46:20,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 04:46:19" (1/3) ... [2022-03-19 04:46:20,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a0a952a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 04:46:20, skipping insertion in model container [2022-03-19 04:46:20,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:46:19" (2/3) ... [2022-03-19 04:46:20,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a0a952a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 04:46:20, skipping insertion in model container [2022-03-19 04:46:20,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 04:46:20" (3/3) ... [2022-03-19 04:46:20,288 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound100.c [2022-03-19 04:46:20,291 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 04:46:20,291 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 04:46:20,330 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 04:46:20,334 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 04:46:20,335 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 04:46:20,354 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) [2022-03-19 04:46:20,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 04:46:20,365 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:20,365 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:46:20,366 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:20,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:20,370 INFO L85 PathProgramCache]: Analyzing trace with hash 928708300, now seen corresponding path program 1 times [2022-03-19 04:46:20,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:20,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1806141473] [2022-03-19 04:46:20,384 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:20,385 INFO L85 PathProgramCache]: Analyzing trace with hash 928708300, now seen corresponding path program 2 times [2022-03-19 04:46:20,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:20,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893323922] [2022-03-19 04:46:20,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:20,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:20,446 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:20,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111611838] [2022-03-19 04:46:20,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:46:20,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:20,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:20,449 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:46:20,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 04:46:20,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 04:46:20,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:20,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 1 conjunts are in the unsatisfiable core [2022-03-19 04:46:20,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 04:46:20,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:46:20,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:20,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893323922] [2022-03-19 04:46:20,549 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:20,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111611838] [2022-03-19 04:46:20,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111611838] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:20,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:20,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-19 04:46:20,552 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:20,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1806141473] [2022-03-19 04:46:20,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1806141473] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:20,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:20,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-19 04:46:20,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627273072] [2022-03-19 04:46:20,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:20,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-03-19 04:46:20,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:20,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-03-19 04:46:20,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-19 04:46:20,575 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), 1 states have call successors, (3) [2022-03-19 04:46:20,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:20,598 INFO L93 Difference]: Finished difference Result 67 states and 100 transitions. [2022-03-19 04:46:20,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-03-19 04:46:20,600 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), 1 states have call successors, (3) Word has length 22 [2022-03-19 04:46:20,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:20,605 INFO L225 Difference]: With dead ends: 67 [2022-03-19 04:46:20,605 INFO L226 Difference]: Without dead ends: 32 [2022-03-19 04:46:20,607 INFO L911 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 [2022-03-19 04:46:20,609 INFO L912 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 [2022-03-19 04:46:20,610 INFO L913 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] [2022-03-19 04:46:20,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-19 04:46:20,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-19 04:46:20,631 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) [2022-03-19 04:46:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-19 04:46:20,633 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2022-03-19 04:46:20,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:20,633 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-19 04:46:20,633 INFO L479 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), 1 states have call successors, (3) [2022-03-19 04:46:20,633 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-19 04:46:20,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 04:46:20,634 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:20,634 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:46:20,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:20,849 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-03-19 04:46:20,849 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:20,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:20,850 INFO L85 PathProgramCache]: Analyzing trace with hash -155606603, now seen corresponding path program 1 times [2022-03-19 04:46:20,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:20,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1340140753] [2022-03-19 04:46:20,852 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:20,852 INFO L85 PathProgramCache]: Analyzing trace with hash -155606603, now seen corresponding path program 2 times [2022-03-19 04:46:20,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:20,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736636117] [2022-03-19 04:46:20,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:20,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:20,866 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:20,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741314450] [2022-03-19 04:46:20,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:46:20,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:20,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:20,871 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:46:20,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 04:46:20,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 04:46:20,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:20,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 04:46:20,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:21,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:46:21,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:21,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736636117] [2022-03-19 04:46:21,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:21,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741314450] [2022-03-19 04:46:21,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741314450] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:21,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:21,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 04:46:21,042 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:21,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1340140753] [2022-03-19 04:46:21,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1340140753] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:21,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:21,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 04:46:21,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340452681] [2022-03-19 04:46:21,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:21,043 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 04:46:21,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:21,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 04:46:21,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 04:46:21,044 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) [2022-03-19 04:46:21,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:21,061 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2022-03-19 04:46:21,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 04:46:21,062 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 [2022-03-19 04:46:21,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:21,063 INFO L225 Difference]: With dead ends: 41 [2022-03-19 04:46:21,063 INFO L226 Difference]: Without dead ends: 34 [2022-03-19 04:46:21,063 INFO L911 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 [2022-03-19 04:46:21,064 INFO L912 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 [2022-03-19 04:46:21,065 INFO L913 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] [2022-03-19 04:46:21,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-19 04:46:21,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-19 04:46:21,072 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) [2022-03-19 04:46:21,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-03-19 04:46:21,073 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2022-03-19 04:46:21,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:21,074 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-03-19 04:46:21,074 INFO L479 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) [2022-03-19 04:46:21,074 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-03-19 04:46:21,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 04:46:21,075 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:21,075 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:46:21,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:21,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-03-19 04:46:21,300 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:21,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:21,301 INFO L85 PathProgramCache]: Analyzing trace with hash -153938307, now seen corresponding path program 1 times [2022-03-19 04:46:21,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:21,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1336665701] [2022-03-19 04:46:21,302 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:21,303 INFO L85 PathProgramCache]: Analyzing trace with hash -153938307, now seen corresponding path program 2 times [2022-03-19 04:46:21,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:21,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175093784] [2022-03-19 04:46:21,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:21,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:21,330 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:21,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29476196] [2022-03-19 04:46:21,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:46:21,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:21,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:21,333 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:46:21,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 04:46:21,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 04:46:21,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:21,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 04:46:21,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:21,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:46:21,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:21,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175093784] [2022-03-19 04:46:21,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:21,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29476196] [2022-03-19 04:46:21,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29476196] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:21,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:21,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:46:21,727 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:21,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1336665701] [2022-03-19 04:46:21,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1336665701] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:21,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:21,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:46:21,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104324347] [2022-03-19 04:46:21,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:21,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:46:21,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:21,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:46:21,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:46:21,729 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) [2022-03-19 04:46:22,801 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 [] [2022-03-19 04:46:24,808 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 04:46:26,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 04:46:26,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:26,855 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-03-19 04:46:26,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:46:26,856 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 [2022-03-19 04:46:26,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:26,857 INFO L225 Difference]: With dead ends: 53 [2022-03-19 04:46:26,857 INFO L226 Difference]: Without dead ends: 51 [2022-03-19 04:46:26,857 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 04:46:26,858 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:26,858 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 129 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 2 Unknown, 0 Unchecked, 5.1s Time] [2022-03-19 04:46:26,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-19 04:46:26,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-19 04:46:26,871 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) [2022-03-19 04:46:26,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2022-03-19 04:46:26,873 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2022-03-19 04:46:26,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:26,873 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2022-03-19 04:46:26,873 INFO L479 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) [2022-03-19 04:46:26,873 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2022-03-19 04:46:26,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 04:46:26,874 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:26,874 INFO L500 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] [2022-03-19 04:46:26,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:27,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:27,096 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:27,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:27,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1676885497, now seen corresponding path program 1 times [2022-03-19 04:46:27,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:27,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [105577330] [2022-03-19 04:46:27,097 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:27,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1676885497, now seen corresponding path program 2 times [2022-03-19 04:46:27,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:27,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680829707] [2022-03-19 04:46:27,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:27,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:27,108 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:27,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062678852] [2022-03-19 04:46:27,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:46:27,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:27,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:27,110 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:46:27,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 04:46:27,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:46:27,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:27,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 04:46:27,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:27,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:27,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:27,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:27,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:27,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680829707] [2022-03-19 04:46:27,401 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:27,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062678852] [2022-03-19 04:46:27,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062678852] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:27,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:27,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-19 04:46:27,401 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:27,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [105577330] [2022-03-19 04:46:27,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [105577330] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:27,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:27,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 04:46:27,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67173678] [2022-03-19 04:46:27,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:27,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 04:46:27,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:27,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 04:46:27,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-19 04:46:27,403 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 04:46:27,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:27,478 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2022-03-19 04:46:27,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 04:46:27,478 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-03-19 04:46:27,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:27,479 INFO L225 Difference]: With dead ends: 57 [2022-03-19 04:46:27,479 INFO L226 Difference]: Without dead ends: 52 [2022-03-19 04:46:27,479 INFO L911 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 [2022-03-19 04:46:27,480 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 24 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:27,480 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 175 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:46:27,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-19 04:46:27,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-19 04:46:27,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 04:46:27,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2022-03-19 04:46:27,491 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 29 [2022-03-19 04:46:27,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:27,491 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2022-03-19 04:46:27,491 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 04:46:27,492 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2022-03-19 04:46:27,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 04:46:27,492 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:27,492 INFO L500 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] [2022-03-19 04:46:27,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-19 04:46:27,709 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:27,709 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:27,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:27,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1154059858, now seen corresponding path program 1 times [2022-03-19 04:46:27,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:27,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [492449878] [2022-03-19 04:46:27,710 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:27,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1154059858, now seen corresponding path program 2 times [2022-03-19 04:46:27,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:27,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939115779] [2022-03-19 04:46:27,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:27,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:27,723 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:27,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995092730] [2022-03-19 04:46:27,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:46:27,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:27,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:27,727 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:46:27,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 04:46:27,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:46:27,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:27,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 04:46:27,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:28,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:46:28,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:28,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939115779] [2022-03-19 04:46:28,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:28,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995092730] [2022-03-19 04:46:28,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995092730] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:28,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:28,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:46:28,085 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:28,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [492449878] [2022-03-19 04:46:28,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [492449878] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:28,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:28,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:46:28,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886744679] [2022-03-19 04:46:28,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:28,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:46:28,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:28,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:46:28,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:46:28,088 INFO L87 Difference]: Start difference. First operand 52 states and 66 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) [2022-03-19 04:46:28,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:28,134 INFO L93 Difference]: Finished difference Result 97 states and 125 transitions. [2022-03-19 04:46:28,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:46:28,136 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 [2022-03-19 04:46:28,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:28,138 INFO L225 Difference]: With dead ends: 97 [2022-03-19 04:46:28,138 INFO L226 Difference]: Without dead ends: 60 [2022-03-19 04:46:28,139 INFO L911 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 [2022-03-19 04:46:28,141 INFO L912 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 [2022-03-19 04:46:28,141 INFO L913 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] [2022-03-19 04:46:28,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-19 04:46:28,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-03-19 04:46:28,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 states have internal predecessors, (52), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 04:46:28,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2022-03-19 04:46:28,188 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 35 [2022-03-19 04:46:28,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:28,188 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2022-03-19 04:46:28,188 INFO L479 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) [2022-03-19 04:46:28,188 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2022-03-19 04:46:28,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 04:46:28,189 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:28,189 INFO L500 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] [2022-03-19 04:46:28,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:28,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:28,412 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:28,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:28,412 INFO L85 PathProgramCache]: Analyzing trace with hash -174895632, now seen corresponding path program 1 times [2022-03-19 04:46:28,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:28,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1203947667] [2022-03-19 04:46:28,413 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:28,413 INFO L85 PathProgramCache]: Analyzing trace with hash -174895632, now seen corresponding path program 2 times [2022-03-19 04:46:28,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:28,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866763525] [2022-03-19 04:46:28,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:28,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:28,423 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:28,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833094067] [2022-03-19 04:46:28,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:46:28,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:28,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:28,430 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) [2022-03-19 04:46:28,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 04:46:28,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:46:28,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:28,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 04:46:28,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:28,582 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:28,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:28,706 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 04:46:28,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:28,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866763525] [2022-03-19 04:46:28,707 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:28,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833094067] [2022-03-19 04:46:28,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833094067] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 04:46:28,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:46:28,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-03-19 04:46:28,708 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:28,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1203947667] [2022-03-19 04:46:28,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1203947667] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:28,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:28,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 04:46:28,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380289868] [2022-03-19 04:46:28,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:28,709 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 04:46:28,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:28,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 04:46:28,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 04:46:28,710 INFO L87 Difference]: Start difference. First operand 60 states and 74 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) [2022-03-19 04:46:28,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:28,762 INFO L93 Difference]: Finished difference Result 106 states and 135 transitions. [2022-03-19 04:46:28,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 04:46:28,762 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 [2022-03-19 04:46:28,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:28,763 INFO L225 Difference]: With dead ends: 106 [2022-03-19 04:46:28,763 INFO L226 Difference]: Without dead ends: 69 [2022-03-19 04:46:28,764 INFO L911 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 [2022-03-19 04:46:28,764 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:28,764 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 141 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:46:28,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-19 04:46:28,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-03-19 04:46:28,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 13 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 04:46:28,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2022-03-19 04:46:28,776 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 41 [2022-03-19 04:46:28,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:28,776 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2022-03-19 04:46:28,777 INFO L479 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) [2022-03-19 04:46:28,777 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2022-03-19 04:46:28,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 04:46:28,777 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:28,778 INFO L500 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] [2022-03-19 04:46:28,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-19 04:46:28,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:28,995 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:28,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:28,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1292932747, now seen corresponding path program 1 times [2022-03-19 04:46:28,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:28,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [890795643] [2022-03-19 04:46:28,996 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:28,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1292932747, now seen corresponding path program 2 times [2022-03-19 04:46:28,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:28,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499090489] [2022-03-19 04:46:28,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:28,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:29,005 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:29,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008102104] [2022-03-19 04:46:29,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:46:29,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:29,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:29,006 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) [2022-03-19 04:46:29,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 04:46:29,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:46:29,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:29,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 04:46:29,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:29,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:29,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:29,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 04:46:29,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:29,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499090489] [2022-03-19 04:46:29,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:29,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008102104] [2022-03-19 04:46:29,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008102104] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:29,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:29,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-19 04:46:29,231 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:29,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [890795643] [2022-03-19 04:46:29,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [890795643] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:29,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:29,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 04:46:29,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018196232] [2022-03-19 04:46:29,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:29,231 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 04:46:29,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:29,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 04:46:29,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 04:46:29,232 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 04:46:29,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:29,269 INFO L93 Difference]: Finished difference Result 91 states and 113 transitions. [2022-03-19 04:46:29,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 04:46:29,270 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 43 [2022-03-19 04:46:29,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:29,270 INFO L225 Difference]: With dead ends: 91 [2022-03-19 04:46:29,270 INFO L226 Difference]: Without dead ends: 70 [2022-03-19 04:46:29,271 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-03-19 04:46:29,271 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 15 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:29,272 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 108 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:46:29,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-19 04:46:29,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-19 04:46:29,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 13 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 04:46:29,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2022-03-19 04:46:29,282 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 43 [2022-03-19 04:46:29,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:29,282 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2022-03-19 04:46:29,283 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 04:46:29,283 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2022-03-19 04:46:29,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 04:46:29,284 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:29,284 INFO L500 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] [2022-03-19 04:46:29,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:29,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:29,503 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:29,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:29,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1407897436, now seen corresponding path program 1 times [2022-03-19 04:46:29,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:29,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1555539687] [2022-03-19 04:46:29,505 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:29,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1407897436, now seen corresponding path program 2 times [2022-03-19 04:46:29,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:29,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324153511] [2022-03-19 04:46:29,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:29,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:29,517 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:29,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1891917865] [2022-03-19 04:46:29,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:46:29,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:29,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:29,519 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) [2022-03-19 04:46:29,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 04:46:29,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:46:29,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:29,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-19 04:46:29,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 04:46:29,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:46:29,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:29,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324153511] [2022-03-19 04:46:29,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:29,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891917865] [2022-03-19 04:46:29,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891917865] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:29,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:29,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 04:46:29,654 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:29,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1555539687] [2022-03-19 04:46:29,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1555539687] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:29,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:29,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 04:46:29,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935323655] [2022-03-19 04:46:29,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:29,655 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 04:46:29,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:29,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 04:46:29,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-19 04:46:29,656 INFO L87 Difference]: Start difference. First operand 70 states and 85 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) [2022-03-19 04:46:29,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:29,706 INFO L93 Difference]: Finished difference Result 119 states and 158 transitions. [2022-03-19 04:46:29,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 04:46:29,707 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 [2022-03-19 04:46:29,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:29,708 INFO L225 Difference]: With dead ends: 119 [2022-03-19 04:46:29,708 INFO L226 Difference]: Without dead ends: 82 [2022-03-19 04:46:29,709 INFO L911 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 [2022-03-19 04:46:29,709 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 19 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 107 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 [2022-03-19 04:46:29,710 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 107 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:46:29,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-19 04:46:29,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2022-03-19 04:46:29,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 14 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 04:46:29,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2022-03-19 04:46:29,726 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 47 [2022-03-19 04:46:29,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:29,726 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2022-03-19 04:46:29,726 INFO L479 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) [2022-03-19 04:46:29,726 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2022-03-19 04:46:29,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 04:46:29,727 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:29,727 INFO L500 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] [2022-03-19 04:46:29,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:29,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-03-19 04:46:29,948 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:29,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:29,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1915058849, now seen corresponding path program 1 times [2022-03-19 04:46:29,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:29,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [966081913] [2022-03-19 04:46:29,949 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:29,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1915058849, now seen corresponding path program 2 times [2022-03-19 04:46:29,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:29,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359285870] [2022-03-19 04:46:29,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:29,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:29,960 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:29,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510856003] [2022-03-19 04:46:29,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:46:29,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:29,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:29,967 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) [2022-03-19 04:46:29,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 04:46:30,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:46:30,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:30,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 04:46:30,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:30,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:30,253 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 04:46:30,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:30,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359285870] [2022-03-19 04:46:30,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:30,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510856003] [2022-03-19 04:46:30,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510856003] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:30,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:30,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-19 04:46:30,256 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:30,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [966081913] [2022-03-19 04:46:30,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [966081913] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:30,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:30,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 04:46:30,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293990993] [2022-03-19 04:46:30,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:30,257 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 04:46:30,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:30,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 04:46:30,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-19 04:46:30,258 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 04:46:30,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:30,317 INFO L93 Difference]: Finished difference Result 118 states and 153 transitions. [2022-03-19 04:46:30,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 04:46:30,317 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 49 [2022-03-19 04:46:30,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:30,318 INFO L225 Difference]: With dead ends: 118 [2022-03-19 04:46:30,318 INFO L226 Difference]: Without dead ends: 81 [2022-03-19 04:46:30,319 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-03-19 04:46:30,319 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 19 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:30,320 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 150 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:46:30,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-19 04:46:30,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-03-19 04:46:30,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 57 states have internal predecessors, (69), 16 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 04:46:30,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2022-03-19 04:46:30,330 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 49 [2022-03-19 04:46:30,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:30,330 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2022-03-19 04:46:30,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 04:46:30,331 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2022-03-19 04:46:30,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 04:46:30,331 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:30,332 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2022-03-19 04:46:30,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:30,545 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:30,545 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:30,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:30,545 INFO L85 PathProgramCache]: Analyzing trace with hash -60460648, now seen corresponding path program 3 times [2022-03-19 04:46:30,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:30,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [302500311] [2022-03-19 04:46:30,546 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:30,546 INFO L85 PathProgramCache]: Analyzing trace with hash -60460648, now seen corresponding path program 4 times [2022-03-19 04:46:30,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:30,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2373844] [2022-03-19 04:46:30,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:30,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:30,553 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:30,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603706744] [2022-03-19 04:46:30,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:46:30,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:30,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:30,568 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) [2022-03-19 04:46:30,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 04:46:30,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:46:30,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:30,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 04:46:30,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:30,774 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:30,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:30,904 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 04:46:30,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:30,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2373844] [2022-03-19 04:46:30,905 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:30,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603706744] [2022-03-19 04:46:30,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603706744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:30,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:30,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-19 04:46:30,905 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:30,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [302500311] [2022-03-19 04:46:30,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [302500311] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:30,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:30,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 04:46:30,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008691292] [2022-03-19 04:46:30,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:30,906 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 04:46:30,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:30,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 04:46:30,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-19 04:46:30,907 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 04:46:30,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:30,959 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2022-03-19 04:46:30,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 04:46:30,960 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 51 [2022-03-19 04:46:30,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:30,961 INFO L225 Difference]: With dead ends: 119 [2022-03-19 04:46:30,961 INFO L226 Difference]: Without dead ends: 82 [2022-03-19 04:46:30,961 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2022-03-19 04:46:30,961 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 14 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:30,962 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 164 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:46:30,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-19 04:46:30,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-03-19 04:46:30,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 59 states have internal predecessors, (71), 16 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 04:46:30,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2022-03-19 04:46:30,970 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 51 [2022-03-19 04:46:30,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:30,970 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2022-03-19 04:46:30,970 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 04:46:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2022-03-19 04:46:30,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 04:46:30,971 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:30,971 INFO L500 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] [2022-03-19 04:46:30,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:31,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 04:46:31,188 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:31,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:31,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1067781299, now seen corresponding path program 1 times [2022-03-19 04:46:31,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:31,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [559896329] [2022-03-19 04:46:31,189 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:31,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1067781299, now seen corresponding path program 2 times [2022-03-19 04:46:31,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:31,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044369027] [2022-03-19 04:46:31,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:31,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:31,196 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:31,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2014937445] [2022-03-19 04:46:31,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:46:31,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:31,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:31,197 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) [2022-03-19 04:46:31,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 04:46:31,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:46:31,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:31,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 04:46:31,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:31,380 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:31,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 04:46:31,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:31,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044369027] [2022-03-19 04:46:31,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:31,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014937445] [2022-03-19 04:46:31,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014937445] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:31,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:31,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 04:46:31,533 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:31,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [559896329] [2022-03-19 04:46:31,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [559896329] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:31,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:31,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 04:46:31,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760782850] [2022-03-19 04:46:31,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:31,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 04:46:31,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:31,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 04:46:31,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-19 04:46:31,535 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 04:46:31,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:31,593 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2022-03-19 04:46:31,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 04:46:31,594 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 55 [2022-03-19 04:46:31,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:31,594 INFO L225 Difference]: With dead ends: 99 [2022-03-19 04:46:31,594 INFO L226 Difference]: Without dead ends: 94 [2022-03-19 04:46:31,595 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-03-19 04:46:31,595 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 36 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:31,595 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 150 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:46:31,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-19 04:46:31,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2022-03-19 04:46:31,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 65 states have (on average 1.2) internal successors, (78), 66 states have internal predecessors, (78), 18 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 04:46:31,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2022-03-19 04:46:31,604 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 55 [2022-03-19 04:46:31,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:31,604 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2022-03-19 04:46:31,604 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 04:46:31,604 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2022-03-19 04:46:31,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 04:46:31,605 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:31,605 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 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] [2022-03-19 04:46:31,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-19 04:46:31,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 04:46:31,819 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:31,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:31,820 INFO L85 PathProgramCache]: Analyzing trace with hash -2095290798, now seen corresponding path program 3 times [2022-03-19 04:46:31,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:31,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [414040161] [2022-03-19 04:46:31,820 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:31,820 INFO L85 PathProgramCache]: Analyzing trace with hash -2095290798, now seen corresponding path program 4 times [2022-03-19 04:46:31,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:31,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499733700] [2022-03-19 04:46:31,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:31,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:31,826 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:31,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799294958] [2022-03-19 04:46:31,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:46:31,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:31,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:31,827 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) [2022-03-19 04:46:31,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 04:46:31,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:46:31,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:31,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 04:46:31,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:31,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:32,143 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 04:46:32,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:32,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499733700] [2022-03-19 04:46:32,144 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:32,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799294958] [2022-03-19 04:46:32,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799294958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:32,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:32,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 04:46:32,144 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:32,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [414040161] [2022-03-19 04:46:32,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [414040161] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:32,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:32,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 04:46:32,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774054095] [2022-03-19 04:46:32,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:32,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 04:46:32,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:32,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 04:46:32,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-19 04:46:32,145 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 04:46:32,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:32,213 INFO L93 Difference]: Finished difference Result 132 states and 170 transitions. [2022-03-19 04:46:32,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 04:46:32,214 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 57 [2022-03-19 04:46:32,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:32,215 INFO L225 Difference]: With dead ends: 132 [2022-03-19 04:46:32,215 INFO L226 Difference]: Without dead ends: 95 [2022-03-19 04:46:32,215 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-19 04:46:32,216 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 33 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:32,216 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 161 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:46:32,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-19 04:46:32,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-03-19 04:46:32,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 68 states have internal predecessors, (82), 18 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 04:46:32,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2022-03-19 04:46:32,225 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 57 [2022-03-19 04:46:32,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:32,226 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2022-03-19 04:46:32,226 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 04:46:32,226 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2022-03-19 04:46:32,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 04:46:32,226 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:32,226 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 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] [2022-03-19 04:46:32,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:32,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 04:46:32,432 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:32,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:32,432 INFO L85 PathProgramCache]: Analyzing trace with hash -659642693, now seen corresponding path program 5 times [2022-03-19 04:46:32,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:32,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [669604644] [2022-03-19 04:46:32,433 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:32,433 INFO L85 PathProgramCache]: Analyzing trace with hash -659642693, now seen corresponding path program 6 times [2022-03-19 04:46:32,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:32,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621351978] [2022-03-19 04:46:32,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:32,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:32,439 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:32,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034483205] [2022-03-19 04:46:32,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:46:32,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:32,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:32,449 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) [2022-03-19 04:46:32,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 04:46:32,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 04:46:32,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:32,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 04:46:32,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:32,656 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:32,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 04:46:32,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:32,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621351978] [2022-03-19 04:46:32,809 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:32,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034483205] [2022-03-19 04:46:32,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034483205] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:32,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:32,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 04:46:32,810 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:32,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [669604644] [2022-03-19 04:46:32,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [669604644] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:32,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:32,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 04:46:32,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761453946] [2022-03-19 04:46:32,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:32,810 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 04:46:32,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:32,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 04:46:32,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-19 04:46:32,811 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 04:46:32,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:32,915 INFO L93 Difference]: Finished difference Result 133 states and 171 transitions. [2022-03-19 04:46:32,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 04:46:32,915 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2022-03-19 04:46:32,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:32,916 INFO L225 Difference]: With dead ends: 133 [2022-03-19 04:46:32,916 INFO L226 Difference]: Without dead ends: 96 [2022-03-19 04:46:32,917 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2022-03-19 04:46:32,917 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 23 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:32,917 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 161 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:46:32,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-19 04:46:32,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-03-19 04:46:32,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 70 states have (on average 1.2) internal successors, (84), 70 states have internal predecessors, (84), 18 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 04:46:32,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2022-03-19 04:46:32,928 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 59 [2022-03-19 04:46:32,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:32,929 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2022-03-19 04:46:32,929 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 04:46:32,929 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2022-03-19 04:46:32,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 04:46:32,930 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:32,930 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:46:32,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-19 04:46:33,134 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 04:46:33,134 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:33,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:33,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1402694082, now seen corresponding path program 3 times [2022-03-19 04:46:33,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:33,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1998027903] [2022-03-19 04:46:33,135 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:33,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1402694082, now seen corresponding path program 4 times [2022-03-19 04:46:33,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:33,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127677608] [2022-03-19 04:46:33,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:33,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:33,140 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:33,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955858353] [2022-03-19 04:46:33,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:46:33,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:33,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:33,141 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) [2022-03-19 04:46:33,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 04:46:33,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:46:33,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:33,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 04:46:33,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:33,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:33,434 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 04:46:33,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:33,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127677608] [2022-03-19 04:46:33,435 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:33,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955858353] [2022-03-19 04:46:33,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955858353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:33,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:33,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-19 04:46:33,435 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:33,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1998027903] [2022-03-19 04:46:33,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1998027903] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:33,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:33,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 04:46:33,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853756850] [2022-03-19 04:46:33,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:33,436 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 04:46:33,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:33,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 04:46:33,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-19 04:46:33,436 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 04:46:33,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:33,500 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2022-03-19 04:46:33,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 04:46:33,501 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 63 [2022-03-19 04:46:33,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:33,501 INFO L225 Difference]: With dead ends: 116 [2022-03-19 04:46:33,501 INFO L226 Difference]: Without dead ends: 111 [2022-03-19 04:46:33,502 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-03-19 04:46:33,502 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 45 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:33,502 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 163 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:46:33,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-19 04:46:33,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2022-03-19 04:46:33,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 78 states have internal predecessors, (91), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 04:46:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 131 transitions. [2022-03-19 04:46:33,511 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 131 transitions. Word has length 63 [2022-03-19 04:46:33,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:33,511 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 131 transitions. [2022-03-19 04:46:33,511 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 04:46:33,511 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 131 transitions. [2022-03-19 04:46:33,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 04:46:33,512 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:33,512 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 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] [2022-03-19 04:46:33,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:33,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:33,728 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:33,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:33,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1823928061, now seen corresponding path program 5 times [2022-03-19 04:46:33,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:33,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1527144709] [2022-03-19 04:46:33,729 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:33,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1823928061, now seen corresponding path program 6 times [2022-03-19 04:46:33,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:33,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725573469] [2022-03-19 04:46:33,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:33,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:33,744 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:33,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31857146] [2022-03-19 04:46:33,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:46:33,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:33,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:33,747 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) [2022-03-19 04:46:33,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 04:46:33,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-19 04:46:33,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:33,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 04:46:33,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 58 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:33,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:34,032 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 04:46:34,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:34,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725573469] [2022-03-19 04:46:34,032 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:34,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31857146] [2022-03-19 04:46:34,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31857146] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:34,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:34,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-19 04:46:34,033 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:34,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1527144709] [2022-03-19 04:46:34,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1527144709] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:34,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:34,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 04:46:34,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671392434] [2022-03-19 04:46:34,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:34,033 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 04:46:34,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:34,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 04:46:34,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-19 04:46:34,034 INFO L87 Difference]: Start difference. First operand 106 states and 131 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 04:46:34,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:34,150 INFO L93 Difference]: Finished difference Result 149 states and 191 transitions. [2022-03-19 04:46:34,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 04:46:34,150 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 65 [2022-03-19 04:46:34,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:34,151 INFO L225 Difference]: With dead ends: 149 [2022-03-19 04:46:34,151 INFO L226 Difference]: Without dead ends: 112 [2022-03-19 04:46:34,152 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-03-19 04:46:34,152 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 47 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:34,153 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 163 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:46:34,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-19 04:46:34,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-03-19 04:46:34,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 80 states have internal predecessors, (95), 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) [2022-03-19 04:46:34,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2022-03-19 04:46:34,170 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 65 [2022-03-19 04:46:34,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:34,170 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2022-03-19 04:46:34,170 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 04:46:34,170 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2022-03-19 04:46:34,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 04:46:34,170 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:34,171 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:46:34,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:34,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-19 04:46:34,388 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:34,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:34,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1211810838, now seen corresponding path program 1 times [2022-03-19 04:46:34,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:34,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1213593190] [2022-03-19 04:46:34,388 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:34,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1211810838, now seen corresponding path program 2 times [2022-03-19 04:46:34,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:34,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117503871] [2022-03-19 04:46:34,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:34,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:34,395 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:34,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149203511] [2022-03-19 04:46:34,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:46:34,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:34,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:34,398 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) [2022-03-19 04:46:34,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 04:46:34,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:46:34,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:34,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 04:46:34,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:34,583 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:34,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 04:46:34,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:34,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117503871] [2022-03-19 04:46:34,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:34,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149203511] [2022-03-19 04:46:34,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149203511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:34,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:34,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-19 04:46:34,731 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:34,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1213593190] [2022-03-19 04:46:34,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1213593190] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:34,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:34,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 04:46:34,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887945414] [2022-03-19 04:46:34,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:34,731 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 04:46:34,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:34,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 04:46:34,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-19 04:46:34,732 INFO L87 Difference]: Start difference. First operand 109 states and 135 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 04:46:34,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:34,847 INFO L93 Difference]: Finished difference Result 151 states and 194 transitions. [2022-03-19 04:46:34,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 04:46:34,850 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 67 [2022-03-19 04:46:34,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:34,851 INFO L225 Difference]: With dead ends: 151 [2022-03-19 04:46:34,851 INFO L226 Difference]: Without dead ends: 114 [2022-03-19 04:46:34,852 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=228, Unknown=0, NotChecked=0, Total=380 [2022-03-19 04:46:34,852 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 47 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:34,852 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 165 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:46:34,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-19 04:46:34,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-03-19 04:46:34,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 04:46:34,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 140 transitions. [2022-03-19 04:46:34,861 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 140 transitions. Word has length 67 [2022-03-19 04:46:34,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:34,861 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 140 transitions. [2022-03-19 04:46:34,861 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 04:46:34,862 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 140 transitions. [2022-03-19 04:46:34,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 04:46:34,862 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:34,862 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 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] [2022-03-19 04:46:34,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:35,078 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 04:46:35,079 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:35,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:35,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1645787183, now seen corresponding path program 5 times [2022-03-19 04:46:35,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:35,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1077784028] [2022-03-19 04:46:35,080 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:35,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1645787183, now seen corresponding path program 6 times [2022-03-19 04:46:35,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:35,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455245635] [2022-03-19 04:46:35,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:35,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:35,086 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:35,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498997357] [2022-03-19 04:46:35,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:46:35,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:35,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:35,099 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) [2022-03-19 04:46:35,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 04:46:35,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 04:46:35,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:35,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 04:46:35,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:35,343 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:35,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:35,530 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-19 04:46:35,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:35,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455245635] [2022-03-19 04:46:35,531 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:35,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498997357] [2022-03-19 04:46:35,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498997357] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:35,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:35,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-19 04:46:35,533 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:35,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1077784028] [2022-03-19 04:46:35,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1077784028] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:35,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:35,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 04:46:35,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518168303] [2022-03-19 04:46:35,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:35,533 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 04:46:35,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:35,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 04:46:35,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-19 04:46:35,534 INFO L87 Difference]: Start difference. First operand 114 states and 140 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 04:46:35,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:35,715 INFO L93 Difference]: Finished difference Result 137 states and 169 transitions. [2022-03-19 04:46:35,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 04:46:35,716 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 71 [2022-03-19 04:46:35,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:35,718 INFO L225 Difference]: With dead ends: 137 [2022-03-19 04:46:35,718 INFO L226 Difference]: Without dead ends: 132 [2022-03-19 04:46:35,718 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=250, Unknown=0, NotChecked=0, Total=420 [2022-03-19 04:46:35,719 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 67 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:35,719 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 177 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:46:35,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-19 04:46:35,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2022-03-19 04:46:35,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 93 states have internal predecessors, (107), 25 states have call successors, (25), 11 states have call predecessors, (25), 9 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 04:46:35,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 155 transitions. [2022-03-19 04:46:35,734 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 155 transitions. Word has length 71 [2022-03-19 04:46:35,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:35,734 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 155 transitions. [2022-03-19 04:46:35,735 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 04:46:35,735 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 155 transitions. [2022-03-19 04:46:35,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 04:46:35,735 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:35,735 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1] [2022-03-19 04:46:35,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:35,936 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 04:46:35,936 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:35,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:35,937 INFO L85 PathProgramCache]: Analyzing trace with hash -15963768, now seen corresponding path program 1 times [2022-03-19 04:46:35,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:35,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [478170420] [2022-03-19 04:46:35,940 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:35,940 INFO L85 PathProgramCache]: Analyzing trace with hash -15963768, now seen corresponding path program 2 times [2022-03-19 04:46:35,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:35,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900609817] [2022-03-19 04:46:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:35,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:35,948 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:35,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447660941] [2022-03-19 04:46:35,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:46:35,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:35,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:35,950 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) [2022-03-19 04:46:35,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 04:46:35,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:46:35,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:35,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-19 04:46:35,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-03-19 04:46:36,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:46:36,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:36,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900609817] [2022-03-19 04:46:36,127 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:36,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447660941] [2022-03-19 04:46:36,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447660941] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:36,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:36,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 04:46:36,127 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:36,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [478170420] [2022-03-19 04:46:36,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [478170420] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:36,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:36,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 04:46:36,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610536034] [2022-03-19 04:46:36,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:36,128 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 04:46:36,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:36,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 04:46:36,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-19 04:46:36,128 INFO L87 Difference]: Start difference. First operand 125 states and 155 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2022-03-19 04:46:36,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:36,166 INFO L93 Difference]: Finished difference Result 180 states and 235 transitions. [2022-03-19 04:46:36,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 04:46:36,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 73 [2022-03-19 04:46:36,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:36,168 INFO L225 Difference]: With dead ends: 180 [2022-03-19 04:46:36,168 INFO L226 Difference]: Without dead ends: 143 [2022-03-19 04:46:36,168 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-19 04:46:36,169 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 12 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:36,169 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 139 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:46:36,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-19 04:46:36,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2022-03-19 04:46:36,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 99 states have (on average 1.202020202020202) internal successors, (119), 102 states have internal predecessors, (119), 28 states have call successors, (28), 11 states have call predecessors, (28), 9 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-19 04:46:36,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2022-03-19 04:46:36,184 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 73 [2022-03-19 04:46:36,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:36,184 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2022-03-19 04:46:36,184 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2022-03-19 04:46:36,184 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2022-03-19 04:46:36,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 04:46:36,185 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:36,185 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 4, 4, 4, 4, 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] [2022-03-19 04:46:36,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:36,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 04:46:36,405 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:36,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:36,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1401128268, now seen corresponding path program 7 times [2022-03-19 04:46:36,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:36,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1251123306] [2022-03-19 04:46:36,406 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:36,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1401128268, now seen corresponding path program 8 times [2022-03-19 04:46:36,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:36,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736245021] [2022-03-19 04:46:36,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:36,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:36,411 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:36,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1689495873] [2022-03-19 04:46:36,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:46:36,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:36,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:36,420 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) [2022-03-19 04:46:36,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 04:46:36,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:46:36,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:36,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 04:46:36,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:36,599 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 14 proven. 92 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:36,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:36,793 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-19 04:46:36,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:36,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736245021] [2022-03-19 04:46:36,793 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:36,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689495873] [2022-03-19 04:46:36,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689495873] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:36,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:36,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-19 04:46:36,794 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:36,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1251123306] [2022-03-19 04:46:36,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1251123306] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:36,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:36,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 04:46:36,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232749912] [2022-03-19 04:46:36,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:36,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 04:46:36,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:36,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 04:46:36,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-19 04:46:36,796 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 04:46:36,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:36,966 INFO L93 Difference]: Finished difference Result 193 states and 252 transitions. [2022-03-19 04:46:36,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 04:46:36,966 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 73 [2022-03-19 04:46:36,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:36,968 INFO L225 Difference]: With dead ends: 193 [2022-03-19 04:46:36,968 INFO L226 Difference]: Without dead ends: 144 [2022-03-19 04:46:36,969 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=277, Unknown=0, NotChecked=0, Total=462 [2022-03-19 04:46:36,969 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 65 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:36,969 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 189 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:46:36,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-19 04:46:36,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2022-03-19 04:46:36,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 102 states have (on average 1.2058823529411764) internal successors, (123), 104 states have internal predecessors, (123), 28 states have call successors, (28), 11 states have call predecessors, (28), 9 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-19 04:46:36,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 177 transitions. [2022-03-19 04:46:36,993 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 177 transitions. Word has length 73 [2022-03-19 04:46:36,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:36,993 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 177 transitions. [2022-03-19 04:46:36,993 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 04:46:36,994 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 177 transitions. [2022-03-19 04:46:36,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 04:46:36,994 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:36,994 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2022-03-19 04:46:37,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:37,202 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:37,203 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:37,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:37,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1116733197, now seen corresponding path program 1 times [2022-03-19 04:46:37,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:37,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1073860075] [2022-03-19 04:46:37,206 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:37,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1116733197, now seen corresponding path program 2 times [2022-03-19 04:46:37,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:37,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792140829] [2022-03-19 04:46:37,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:37,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:37,210 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:37,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303126083] [2022-03-19 04:46:37,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:46:37,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:37,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:37,226 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) [2022-03-19 04:46:37,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 04:46:37,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:46:37,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:37,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 04:46:37,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 76 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:37,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-19 04:46:37,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:37,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792140829] [2022-03-19 04:46:37,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:37,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303126083] [2022-03-19 04:46:37,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303126083] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:37,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:37,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-19 04:46:37,641 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:37,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1073860075] [2022-03-19 04:46:37,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1073860075] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:37,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:37,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 04:46:37,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115063004] [2022-03-19 04:46:37,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:37,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 04:46:37,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:37,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 04:46:37,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-19 04:46:37,642 INFO L87 Difference]: Start difference. First operand 140 states and 177 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 04:46:37,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:37,753 INFO L93 Difference]: Finished difference Result 195 states and 255 transitions. [2022-03-19 04:46:37,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 04:46:37,754 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 75 [2022-03-19 04:46:37,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:37,754 INFO L225 Difference]: With dead ends: 195 [2022-03-19 04:46:37,754 INFO L226 Difference]: Without dead ends: 146 [2022-03-19 04:46:37,755 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=205, Invalid=301, Unknown=0, NotChecked=0, Total=506 [2022-03-19 04:46:37,755 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 58 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:37,755 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 183 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:46:37,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-19 04:46:37,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-03-19 04:46:37,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 108 states have (on average 1.1944444444444444) internal successors, (129), 108 states have internal predecessors, (129), 28 states have call successors, (28), 11 states have call predecessors, (28), 9 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-19 04:46:37,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 183 transitions. [2022-03-19 04:46:37,772 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 183 transitions. Word has length 75 [2022-03-19 04:46:37,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:37,772 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 183 transitions. [2022-03-19 04:46:37,772 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 04:46:37,772 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 183 transitions. [2022-03-19 04:46:37,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 04:46:37,773 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:37,773 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 5, 5, 5, 5, 4, 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] [2022-03-19 04:46:37,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:37,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:37,987 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:37,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:37,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1970775776, now seen corresponding path program 7 times [2022-03-19 04:46:37,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:37,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1576110226] [2022-03-19 04:46:37,988 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:37,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1970775776, now seen corresponding path program 8 times [2022-03-19 04:46:37,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:37,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391594176] [2022-03-19 04:46:37,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:37,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:37,999 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:37,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405271581] [2022-03-19 04:46:37,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:46:38,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:38,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:38,001 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) [2022-03-19 04:46:38,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 04:46:38,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:46:38,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:38,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 04:46:38,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 14 proven. 126 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:38,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-19 04:46:38,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:38,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391594176] [2022-03-19 04:46:38,466 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:38,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405271581] [2022-03-19 04:46:38,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405271581] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:38,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:38,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-19 04:46:38,466 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:38,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1576110226] [2022-03-19 04:46:38,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1576110226] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:38,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:38,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 04:46:38,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183149538] [2022-03-19 04:46:38,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:38,467 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 04:46:38,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:38,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 04:46:38,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-19 04:46:38,468 INFO L87 Difference]: Start difference. First operand 146 states and 183 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 04:46:38,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:38,641 INFO L93 Difference]: Finished difference Result 168 states and 210 transitions. [2022-03-19 04:46:38,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 04:46:38,644 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 79 [2022-03-19 04:46:38,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:38,645 INFO L225 Difference]: With dead ends: 168 [2022-03-19 04:46:38,645 INFO L226 Difference]: Without dead ends: 163 [2022-03-19 04:46:38,645 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=327, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:46:38,647 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 67 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:38,647 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 208 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:46:38,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-19 04:46:38,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2022-03-19 04:46:38,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 114 states have (on average 1.1929824561403508) internal successors, (136), 117 states have internal predecessors, (136), 32 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-19 04:46:38,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 198 transitions. [2022-03-19 04:46:38,703 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 198 transitions. Word has length 79 [2022-03-19 04:46:38,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:38,705 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 198 transitions. [2022-03-19 04:46:38,705 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 04:46:38,705 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 198 transitions. [2022-03-19 04:46:38,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-19 04:46:38,706 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:38,706 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2022-03-19 04:46:38,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:38,906 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:38,907 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:38,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:38,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1693648491, now seen corresponding path program 1 times [2022-03-19 04:46:38,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:38,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [552819246] [2022-03-19 04:46:38,908 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:38,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1693648491, now seen corresponding path program 2 times [2022-03-19 04:46:38,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:38,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992160111] [2022-03-19 04:46:38,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:38,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:38,914 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:38,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722044604] [2022-03-19 04:46:38,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:46:38,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:38,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:38,924 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) [2022-03-19 04:46:38,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 04:46:39,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:46:39,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:39,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 04:46:39,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:39,265 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:39,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-19 04:46:39,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:39,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992160111] [2022-03-19 04:46:39,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:39,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722044604] [2022-03-19 04:46:39,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722044604] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:39,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:39,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-19 04:46:39,557 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:39,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [552819246] [2022-03-19 04:46:39,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [552819246] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:39,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:39,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 04:46:39,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048874295] [2022-03-19 04:46:39,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:39,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 04:46:39,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:39,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 04:46:39,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-19 04:46:39,559 INFO L87 Difference]: Start difference. First operand 157 states and 198 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 04:46:39,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:39,764 INFO L93 Difference]: Finished difference Result 213 states and 277 transitions. [2022-03-19 04:46:39,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 04:46:39,765 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 81 [2022-03-19 04:46:39,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:39,766 INFO L225 Difference]: With dead ends: 213 [2022-03-19 04:46:39,766 INFO L226 Difference]: Without dead ends: 164 [2022-03-19 04:46:39,766 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=243, Invalid=357, Unknown=0, NotChecked=0, Total=600 [2022-03-19 04:46:39,767 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 69 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:39,767 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 231 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:46:39,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-19 04:46:39,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2022-03-19 04:46:39,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 117 states have (on average 1.1965811965811965) internal successors, (140), 119 states have internal predecessors, (140), 32 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-19 04:46:39,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2022-03-19 04:46:39,789 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 81 [2022-03-19 04:46:39,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:39,789 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2022-03-19 04:46:39,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 04:46:39,790 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2022-03-19 04:46:39,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-19 04:46:39,791 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:39,791 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2022-03-19 04:46:39,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:40,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:40,007 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:40,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:40,008 INFO L85 PathProgramCache]: Analyzing trace with hash -918360272, now seen corresponding path program 3 times [2022-03-19 04:46:40,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:40,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1665282219] [2022-03-19 04:46:40,008 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:40,008 INFO L85 PathProgramCache]: Analyzing trace with hash -918360272, now seen corresponding path program 4 times [2022-03-19 04:46:40,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:40,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314082631] [2022-03-19 04:46:40,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:40,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:40,015 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:40,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [881268944] [2022-03-19 04:46:40,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:46:40,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:40,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:40,020 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) [2022-03-19 04:46:40,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 04:46:40,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:46:40,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:40,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 04:46:40,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 22 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:40,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-19 04:46:40,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:40,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314082631] [2022-03-19 04:46:40,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:40,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881268944] [2022-03-19 04:46:40,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881268944] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:40,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:40,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-19 04:46:40,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:40,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1665282219] [2022-03-19 04:46:40,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1665282219] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:40,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:40,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 04:46:40,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414302549] [2022-03-19 04:46:40,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:40,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 04:46:40,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:40,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 04:46:40,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-19 04:46:40,543 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 04:46:40,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:40,665 INFO L93 Difference]: Finished difference Result 215 states and 280 transitions. [2022-03-19 04:46:40,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 04:46:40,666 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 83 [2022-03-19 04:46:40,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:40,666 INFO L225 Difference]: With dead ends: 215 [2022-03-19 04:46:40,666 INFO L226 Difference]: Without dead ends: 166 [2022-03-19 04:46:40,667 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=266, Invalid=384, Unknown=0, NotChecked=0, Total=650 [2022-03-19 04:46:40,667 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 63 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:40,667 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 223 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:46:40,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-03-19 04:46:40,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-03-19 04:46:40,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 123 states have internal predecessors, (146), 32 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-19 04:46:40,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 208 transitions. [2022-03-19 04:46:40,692 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 208 transitions. Word has length 83 [2022-03-19 04:46:40,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:40,692 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 208 transitions. [2022-03-19 04:46:40,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 04:46:40,692 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 208 transitions. [2022-03-19 04:46:40,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-19 04:46:40,694 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:40,694 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 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] [2022-03-19 04:46:40,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:40,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:40,916 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:40,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:40,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1698627479, now seen corresponding path program 1 times [2022-03-19 04:46:40,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:40,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2044238819] [2022-03-19 04:46:40,917 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:40,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1698627479, now seen corresponding path program 2 times [2022-03-19 04:46:40,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:40,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922983211] [2022-03-19 04:46:40,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:40,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:40,924 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:40,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857152175] [2022-03-19 04:46:40,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:46:40,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:40,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:40,927 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) [2022-03-19 04:46:40,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 04:46:40,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:46:40,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:40,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 04:46:40,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 16 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:41,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-19 04:46:41,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:41,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922983211] [2022-03-19 04:46:41,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:41,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857152175] [2022-03-19 04:46:41,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857152175] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:41,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:41,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-19 04:46:41,444 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:41,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2044238819] [2022-03-19 04:46:41,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2044238819] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:41,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:41,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 04:46:41,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134681370] [2022-03-19 04:46:41,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:41,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 04:46:41,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:41,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 04:46:41,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-19 04:46:41,445 INFO L87 Difference]: Start difference. First operand 166 states and 208 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 04:46:41,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:41,610 INFO L93 Difference]: Finished difference Result 188 states and 235 transitions. [2022-03-19 04:46:41,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 04:46:41,611 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 87 [2022-03-19 04:46:41,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:41,612 INFO L225 Difference]: With dead ends: 188 [2022-03-19 04:46:41,612 INFO L226 Difference]: Without dead ends: 183 [2022-03-19 04:46:41,613 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=288, Invalid=414, Unknown=0, NotChecked=0, Total=702 [2022-03-19 04:46:41,614 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 85 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:41,615 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 230 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:46:41,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-19 04:46:41,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 177. [2022-03-19 04:46:41,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 129 states have (on average 1.186046511627907) internal successors, (153), 132 states have internal predecessors, (153), 36 states have call successors, (36), 13 states have call predecessors, (36), 11 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-19 04:46:41,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 223 transitions. [2022-03-19 04:46:41,644 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 223 transitions. Word has length 87 [2022-03-19 04:46:41,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:41,644 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 223 transitions. [2022-03-19 04:46:41,644 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 04:46:41,644 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 223 transitions. [2022-03-19 04:46:41,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-19 04:46:41,646 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:41,646 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 3, 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] [2022-03-19 04:46:41,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-19 04:46:41,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:41,852 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:41,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:41,852 INFO L85 PathProgramCache]: Analyzing trace with hash 2133755932, now seen corresponding path program 3 times [2022-03-19 04:46:41,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:41,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1178089460] [2022-03-19 04:46:41,853 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:41,853 INFO L85 PathProgramCache]: Analyzing trace with hash 2133755932, now seen corresponding path program 4 times [2022-03-19 04:46:41,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:41,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935568222] [2022-03-19 04:46:41,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:41,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:41,857 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:41,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297755392] [2022-03-19 04:46:41,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:46:41,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:41,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:41,865 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) [2022-03-19 04:46:41,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 04:46:41,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:46:41,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:41,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 04:46:41,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-03-19 04:46:42,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:42,173 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-03-19 04:46:42,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:42,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935568222] [2022-03-19 04:46:42,174 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:42,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297755392] [2022-03-19 04:46:42,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297755392] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:42,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:42,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-03-19 04:46:42,174 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:42,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1178089460] [2022-03-19 04:46:42,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1178089460] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:42,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:42,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 04:46:42,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594175908] [2022-03-19 04:46:42,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:42,175 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 04:46:42,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:42,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 04:46:42,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 04:46:42,176 INFO L87 Difference]: Start difference. First operand 177 states and 223 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2022-03-19 04:46:42,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:42,245 INFO L93 Difference]: Finished difference Result 407 states and 543 transitions. [2022-03-19 04:46:42,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:46:42,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 89 [2022-03-19 04:46:42,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:42,248 INFO L225 Difference]: With dead ends: 407 [2022-03-19 04:46:42,248 INFO L226 Difference]: Without dead ends: 301 [2022-03-19 04:46:42,250 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:46:42,250 INFO L912 BasicCegarLoop]: 73 mSDtfsCounter, 15 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:42,250 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 168 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:46:42,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-03-19 04:46:42,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 296. [2022-03-19 04:46:42,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 219 states have (on average 1.2191780821917808) internal successors, (267), 225 states have internal predecessors, (267), 65 states have call successors, (65), 13 states have call predecessors, (65), 11 states have return successors, (63), 57 states have call predecessors, (63), 63 states have call successors, (63) [2022-03-19 04:46:42,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 395 transitions. [2022-03-19 04:46:42,293 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 395 transitions. Word has length 89 [2022-03-19 04:46:42,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:42,293 INFO L478 AbstractCegarLoop]: Abstraction has 296 states and 395 transitions. [2022-03-19 04:46:42,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2022-03-19 04:46:42,293 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 395 transitions. [2022-03-19 04:46:42,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-19 04:46:42,294 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:42,295 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 2, 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, 1, 1, 1] [2022-03-19 04:46:42,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-19 04:46:42,510 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-19 04:46:42,511 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:42,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:42,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1322512306, now seen corresponding path program 5 times [2022-03-19 04:46:42,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:42,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1727908677] [2022-03-19 04:46:42,511 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:42,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1322512306, now seen corresponding path program 6 times [2022-03-19 04:46:42,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:42,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678956931] [2022-03-19 04:46:42,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:42,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:42,516 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:42,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71349198] [2022-03-19 04:46:42,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:46:42,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:42,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:42,520 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) [2022-03-19 04:46:42,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 04:46:42,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-19 04:46:42,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:42,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 04:46:42,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 16 proven. 152 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:42,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:42,929 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 16 proven. 40 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-19 04:46:42,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:42,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678956931] [2022-03-19 04:46:42,930 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:42,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71349198] [2022-03-19 04:46:42,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71349198] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:42,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:42,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-19 04:46:42,930 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:42,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1727908677] [2022-03-19 04:46:42,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1727908677] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:42,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:42,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 04:46:42,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284106283] [2022-03-19 04:46:42,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:42,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 04:46:42,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:42,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 04:46:42,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:46:42,932 INFO L87 Difference]: Start difference. First operand 296 states and 395 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 04:46:43,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:43,135 INFO L93 Difference]: Finished difference Result 362 states and 486 transitions. [2022-03-19 04:46:43,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 04:46:43,135 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 89 [2022-03-19 04:46:43,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:43,136 INFO L225 Difference]: With dead ends: 362 [2022-03-19 04:46:43,137 INFO L226 Difference]: Without dead ends: 357 [2022-03-19 04:46:43,137 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2022-03-19 04:46:43,137 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 169 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:43,137 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 242 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:46:43,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-03-19 04:46:43,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 342. [2022-03-19 04:46:43,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 255 states have (on average 1.231372549019608) internal successors, (314), 261 states have internal predecessors, (314), 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) [2022-03-19 04:46:43,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 460 transitions. [2022-03-19 04:46:43,169 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 460 transitions. Word has length 89 [2022-03-19 04:46:43,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:43,170 INFO L478 AbstractCegarLoop]: Abstraction has 342 states and 460 transitions. [2022-03-19 04:46:43,170 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 04:46:43,170 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 460 transitions. [2022-03-19 04:46:43,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-19 04:46:43,171 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:43,171 INFO L500 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] [2022-03-19 04:46:43,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:43,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-19 04:46:43,375 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:43,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:43,376 INFO L85 PathProgramCache]: Analyzing trace with hash -345961389, now seen corresponding path program 5 times [2022-03-19 04:46:43,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:43,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1319445137] [2022-03-19 04:46:43,376 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:43,376 INFO L85 PathProgramCache]: Analyzing trace with hash -345961389, now seen corresponding path program 6 times [2022-03-19 04:46:43,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:43,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103797265] [2022-03-19 04:46:43,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:43,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:43,381 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:43,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931941730] [2022-03-19 04:46:43,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:46:43,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:43,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:43,384 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:46:43,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 04:46:43,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-19 04:46:43,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:43,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 04:46:43,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:43,715 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 24 proven. 152 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:43,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:43,958 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-19 04:46:43,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:43,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103797265] [2022-03-19 04:46:43,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:43,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931941730] [2022-03-19 04:46:43,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931941730] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:43,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:43,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-19 04:46:43,959 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:43,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1319445137] [2022-03-19 04:46:43,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1319445137] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:43,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:43,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 04:46:43,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512777515] [2022-03-19 04:46:43,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:43,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 04:46:43,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:43,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 04:46:43,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-19 04:46:43,961 INFO L87 Difference]: Start difference. First operand 342 states and 460 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 04:46:44,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:44,113 INFO L93 Difference]: Finished difference Result 427 states and 585 transitions. [2022-03-19 04:46:44,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 04:46:44,114 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 91 [2022-03-19 04:46:44,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:44,118 INFO L225 Difference]: With dead ends: 427 [2022-03-19 04:46:44,118 INFO L226 Difference]: Without dead ends: 342 [2022-03-19 04:46:44,119 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=335, Invalid=477, Unknown=0, NotChecked=0, Total=812 [2022-03-19 04:46:44,120 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 134 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:44,120 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 209 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:46:44,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-03-19 04:46:44,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2022-03-19 04:46:44,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 255 states have (on average 1.2156862745098038) internal successors, (310), 261 states have internal predecessors, (310), 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) [2022-03-19 04:46:44,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 456 transitions. [2022-03-19 04:46:44,153 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 456 transitions. Word has length 91 [2022-03-19 04:46:44,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:44,153 INFO L478 AbstractCegarLoop]: Abstraction has 342 states and 456 transitions. [2022-03-19 04:46:44,153 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 04:46:44,153 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 456 transitions. [2022-03-19 04:46:44,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-19 04:46:44,155 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:44,155 INFO L500 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] [2022-03-19 04:46:44,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:44,358 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-19 04:46:44,359 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:44,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:44,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1660747519, now seen corresponding path program 7 times [2022-03-19 04:46:44,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:44,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [941753034] [2022-03-19 04:46:44,360 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:44,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1660747519, now seen corresponding path program 8 times [2022-03-19 04:46:44,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:44,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263792419] [2022-03-19 04:46:44,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:44,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:44,370 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:44,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989529545] [2022-03-19 04:46:44,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:46:44,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:44,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:44,371 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:46:44,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 04:46:44,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:46:44,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:44,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 04:46:44,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:44,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:44,907 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-19 04:46:44,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:44,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263792419] [2022-03-19 04:46:44,908 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:44,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989529545] [2022-03-19 04:46:44,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989529545] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:44,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:44,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-19 04:46:44,908 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:44,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [941753034] [2022-03-19 04:46:44,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [941753034] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:44,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:44,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 04:46:44,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274422356] [2022-03-19 04:46:44,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:44,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 04:46:44,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:44,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 04:46:44,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:46:44,910 INFO L87 Difference]: Start difference. First operand 342 states and 456 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-19 04:46:45,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:45,101 INFO L93 Difference]: Finished difference Result 467 states and 640 transitions. [2022-03-19 04:46:45,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 04:46:45,102 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 97 [2022-03-19 04:46:45,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:45,104 INFO L225 Difference]: With dead ends: 467 [2022-03-19 04:46:45,104 INFO L226 Difference]: Without dead ends: 352 [2022-03-19 04:46:45,105 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=383, Invalid=547, Unknown=0, NotChecked=0, Total=930 [2022-03-19 04:46:45,105 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 147 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:45,105 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 215 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:46:45,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-03-19 04:46:45,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 344. [2022-03-19 04:46:45,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 257 states have (on average 1.2101167315175096) internal successors, (311), 261 states have internal predecessors, (311), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-19 04:46:45,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 457 transitions. [2022-03-19 04:46:45,149 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 457 transitions. Word has length 97 [2022-03-19 04:46:45,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:45,149 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 457 transitions. [2022-03-19 04:46:45,150 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-19 04:46:45,150 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 457 transitions. [2022-03-19 04:46:45,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-19 04:46:45,151 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:45,151 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:46:45,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:45,360 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-19 04:46:45,361 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:45,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:45,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1020733748, now seen corresponding path program 7 times [2022-03-19 04:46:45,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:45,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [209145138] [2022-03-19 04:46:45,362 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:45,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1020733748, now seen corresponding path program 8 times [2022-03-19 04:46:45,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:45,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605336799] [2022-03-19 04:46:45,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:45,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:45,368 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:45,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [260264230] [2022-03-19 04:46:45,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:46:45,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:45,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:45,370 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:46:45,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 04:46:45,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:46:45,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:45,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-19 04:46:45,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-03-19 04:46:45,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:46:45,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:45,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605336799] [2022-03-19 04:46:45,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:45,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260264230] [2022-03-19 04:46:45,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260264230] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:45,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:45,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 04:46:45,563 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:45,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [209145138] [2022-03-19 04:46:45,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [209145138] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:45,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:45,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 04:46:45,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963437593] [2022-03-19 04:46:45,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:45,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 04:46:45,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:45,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 04:46:45,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-19 04:46:45,564 INFO L87 Difference]: Start difference. First operand 344 states and 457 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) [2022-03-19 04:46:45,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:45,614 INFO L93 Difference]: Finished difference Result 504 states and 675 transitions. [2022-03-19 04:46:45,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 04:46:45,614 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 99 [2022-03-19 04:46:45,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:45,616 INFO L225 Difference]: With dead ends: 504 [2022-03-19 04:46:45,616 INFO L226 Difference]: Without dead ends: 362 [2022-03-19 04:46:45,617 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-19 04:46:45,617 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 12 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:45,617 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 132 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:46:45,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-03-19 04:46:45,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 352. [2022-03-19 04:46:45,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 265 states have (on average 1.2150943396226415) internal successors, (322), 269 states have internal predecessors, (322), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-19 04:46:45,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 468 transitions. [2022-03-19 04:46:45,651 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 468 transitions. Word has length 99 [2022-03-19 04:46:45,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:45,651 INFO L478 AbstractCegarLoop]: Abstraction has 352 states and 468 transitions. [2022-03-19 04:46:45,651 INFO L479 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) [2022-03-19 04:46:45,651 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 468 transitions. [2022-03-19 04:46:45,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-19 04:46:45,652 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:45,652 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 5, 5, 5, 4, 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] [2022-03-19 04:46:45,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:45,868 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-19 04:46:45,869 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:45,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:45,869 INFO L85 PathProgramCache]: Analyzing trace with hash 359487094, now seen corresponding path program 9 times [2022-03-19 04:46:45,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:45,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1821436951] [2022-03-19 04:46:45,869 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:45,869 INFO L85 PathProgramCache]: Analyzing trace with hash 359487094, now seen corresponding path program 10 times [2022-03-19 04:46:45,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:45,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820373057] [2022-03-19 04:46:45,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:45,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:45,882 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:45,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420201345] [2022-03-19 04:46:45,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:46:45,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:45,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:45,890 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:46:45,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 04:46:46,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:46:46,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:46,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 04:46:46,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 26 proven. 202 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:46,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:46,514 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-19 04:46:46,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:46,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820373057] [2022-03-19 04:46:46,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:46,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420201345] [2022-03-19 04:46:46,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420201345] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:46,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:46,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-19 04:46:46,515 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:46,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1821436951] [2022-03-19 04:46:46,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1821436951] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:46,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:46,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 04:46:46,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721197196] [2022-03-19 04:46:46,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:46,515 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 04:46:46,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:46,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 04:46:46,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:46:46,516 INFO L87 Difference]: Start difference. First operand 352 states and 468 transitions. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 12 states have internal predecessors, (70), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-19 04:46:46,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:46,710 INFO L93 Difference]: Finished difference Result 471 states and 642 transitions. [2022-03-19 04:46:46,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 04:46:46,711 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 12 states have internal predecessors, (70), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 99 [2022-03-19 04:46:46,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:46,712 INFO L225 Difference]: With dead ends: 471 [2022-03-19 04:46:46,712 INFO L226 Difference]: Without dead ends: 364 [2022-03-19 04:46:46,713 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2022-03-19 04:46:46,713 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 128 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:46,713 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 226 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:46:46,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-03-19 04:46:46,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2022-03-19 04:46:46,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 277 states have (on average 1.2057761732851986) internal successors, (334), 277 states have internal predecessors, (334), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-19 04:46:46,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 480 transitions. [2022-03-19 04:46:46,749 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 480 transitions. Word has length 99 [2022-03-19 04:46:46,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:46,749 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 480 transitions. [2022-03-19 04:46:46,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 12 states have internal predecessors, (70), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-19 04:46:46,749 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 480 transitions. [2022-03-19 04:46:46,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-19 04:46:46,750 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:46,750 INFO L500 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] [2022-03-19 04:46:46,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:46,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:46,963 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:46,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:46,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1761003221, now seen corresponding path program 3 times [2022-03-19 04:46:46,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:46,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [409159221] [2022-03-19 04:46:46,964 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:46,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1761003221, now seen corresponding path program 4 times [2022-03-19 04:46:46,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:46,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920610431] [2022-03-19 04:46:46,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:46,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:46,969 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:46,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1363528616] [2022-03-19 04:46:46,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:46:46,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:46,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:46,971 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:46:46,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 04:46:47,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:46:47,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:47,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 04:46:47,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:47,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:47,553 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-19 04:46:47,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:47,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920610431] [2022-03-19 04:46:47,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:47,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363528616] [2022-03-19 04:46:47,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363528616] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:47,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:47,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-19 04:46:47,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:47,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [409159221] [2022-03-19 04:46:47,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [409159221] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:47,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:47,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 04:46:47,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685320720] [2022-03-19 04:46:47,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:47,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 04:46:47,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:47,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 04:46:47,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-19 04:46:47,555 INFO L87 Difference]: Start difference. First operand 364 states and 480 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 04:46:47,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:47,758 INFO L93 Difference]: Finished difference Result 407 states and 538 transitions. [2022-03-19 04:46:47,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 04:46:47,759 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 103 [2022-03-19 04:46:47,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:47,760 INFO L225 Difference]: With dead ends: 407 [2022-03-19 04:46:47,760 INFO L226 Difference]: Without dead ends: 396 [2022-03-19 04:46:47,761 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=438, Invalid=618, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 04:46:47,761 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 151 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:47,761 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 243 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:46:47,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-03-19 04:46:47,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 377. [2022-03-19 04:46:47,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 281 states have (on average 1.206405693950178) internal successors, (339), 288 states have internal predecessors, (339), 82 states have call successors, (82), 15 states have call predecessors, (82), 13 states have return successors, (80), 73 states have call predecessors, (80), 80 states have call successors, (80) [2022-03-19 04:46:47,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 501 transitions. [2022-03-19 04:46:47,802 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 501 transitions. Word has length 103 [2022-03-19 04:46:47,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:47,802 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 501 transitions. [2022-03-19 04:46:47,802 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 04:46:47,802 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 501 transitions. [2022-03-19 04:46:47,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-19 04:46:47,804 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:47,804 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-19 04:46:47,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:48,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:48,024 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:48,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:48,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1733340336, now seen corresponding path program 9 times [2022-03-19 04:46:48,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:48,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [444136071] [2022-03-19 04:46:48,025 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:48,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1733340336, now seen corresponding path program 10 times [2022-03-19 04:46:48,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:48,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601120122] [2022-03-19 04:46:48,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:48,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:48,040 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:48,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968188270] [2022-03-19 04:46:48,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:46:48,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:48,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:48,041 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:46:48,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 04:46:48,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:46:48,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:48,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 04:46:48,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 60 proven. 24 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-19 04:46:48,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 60 proven. 24 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-19 04:46:48,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:48,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601120122] [2022-03-19 04:46:48,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:48,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968188270] [2022-03-19 04:46:48,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968188270] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:48,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:48,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-19 04:46:48,445 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:48,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [444136071] [2022-03-19 04:46:48,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [444136071] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:48,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:48,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 04:46:48,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803931569] [2022-03-19 04:46:48,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:48,448 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 04:46:48,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:48,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 04:46:48,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-19 04:46:48,450 INFO L87 Difference]: Start difference. First operand 377 states and 501 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 04:46:48,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:48,643 INFO L93 Difference]: Finished difference Result 649 states and 907 transitions. [2022-03-19 04:46:48,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 04:46:48,643 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 105 [2022-03-19 04:46:48,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:48,647 INFO L225 Difference]: With dead ends: 649 [2022-03-19 04:46:48,647 INFO L226 Difference]: Without dead ends: 588 [2022-03-19 04:46:48,649 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 04:46:48,649 INFO L912 BasicCegarLoop]: 96 mSDtfsCounter, 36 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:48,649 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 351 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:46:48,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-03-19 04:46:48,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 504. [2022-03-19 04:46:48,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 376 states have (on average 1.247340425531915) internal successors, (469), 386 states have internal predecessors, (469), 114 states have call successors, (114), 15 states have call predecessors, (114), 13 states have return successors, (112), 102 states have call predecessors, (112), 112 states have call successors, (112) [2022-03-19 04:46:48,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 695 transitions. [2022-03-19 04:46:48,796 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 695 transitions. Word has length 105 [2022-03-19 04:46:48,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:48,796 INFO L478 AbstractCegarLoop]: Abstraction has 504 states and 695 transitions. [2022-03-19 04:46:48,796 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 04:46:48,797 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 695 transitions. [2022-03-19 04:46:48,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-19 04:46:48,798 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:48,798 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 5, 5, 5, 4, 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] [2022-03-19 04:46:48,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:49,022 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:49,022 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:49,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:49,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1666981150, now seen corresponding path program 11 times [2022-03-19 04:46:49,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:49,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1068555777] [2022-03-19 04:46:49,023 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:49,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1666981150, now seen corresponding path program 12 times [2022-03-19 04:46:49,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:49,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147428666] [2022-03-19 04:46:49,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:49,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:49,032 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:49,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715123963] [2022-03-19 04:46:49,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:46:49,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:49,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:49,048 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:46:49,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 04:46:49,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 04:46:49,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:49,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 04:46:49,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 24 proven. 242 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:49,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:49,724 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 24 proven. 62 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-19 04:46:49,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:49,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147428666] [2022-03-19 04:46:49,725 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:49,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715123963] [2022-03-19 04:46:49,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715123963] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:49,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:49,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-19 04:46:49,725 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:49,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1068555777] [2022-03-19 04:46:49,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1068555777] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:49,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:49,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 04:46:49,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034231369] [2022-03-19 04:46:49,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:49,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 04:46:49,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:49,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 04:46:49,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-19 04:46:49,727 INFO L87 Difference]: Start difference. First operand 504 states and 695 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 04:46:50,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:50,036 INFO L93 Difference]: Finished difference Result 753 states and 1073 transitions. [2022-03-19 04:46:50,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 04:46:50,037 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 105 [2022-03-19 04:46:50,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:50,039 INFO L225 Difference]: With dead ends: 753 [2022-03-19 04:46:50,040 INFO L226 Difference]: Without dead ends: 532 [2022-03-19 04:46:50,041 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=465, Invalid=657, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 04:46:50,041 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 153 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:50,042 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 241 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:46:50,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-03-19 04:46:50,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 522. [2022-03-19 04:46:50,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 394 states have (on average 1.2461928934010151) internal successors, (491), 398 states have internal predecessors, (491), 114 states have call successors, (114), 15 states have call predecessors, (114), 13 states have return successors, (112), 108 states have call predecessors, (112), 112 states have call successors, (112) [2022-03-19 04:46:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 717 transitions. [2022-03-19 04:46:50,117 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 717 transitions. Word has length 105 [2022-03-19 04:46:50,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:50,118 INFO L478 AbstractCegarLoop]: Abstraction has 522 states and 717 transitions. [2022-03-19 04:46:50,118 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 04:46:50,118 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 717 transitions. [2022-03-19 04:46:50,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-19 04:46:50,119 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:50,120 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 7, 6, 6, 6, 5, 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] [2022-03-19 04:46:50,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-19 04:46:50,325 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-19 04:46:50,326 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:50,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:50,326 INFO L85 PathProgramCache]: Analyzing trace with hash -2132095591, now seen corresponding path program 11 times [2022-03-19 04:46:50,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:50,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2113286314] [2022-03-19 04:46:50,327 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:50,327 INFO L85 PathProgramCache]: Analyzing trace with hash -2132095591, now seen corresponding path program 12 times [2022-03-19 04:46:50,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:50,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584290289] [2022-03-19 04:46:50,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:50,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:50,332 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:50,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [417921546] [2022-03-19 04:46:50,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:46:50,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:50,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:50,333 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:46:50,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 04:46:50,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 04:46:50,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:50,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 04:46:50,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:50,591 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 28 proven. 260 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:50,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 28 proven. 80 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-19 04:46:50,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:50,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584290289] [2022-03-19 04:46:50,791 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:50,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417921546] [2022-03-19 04:46:50,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417921546] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:50,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:50,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-19 04:46:50,792 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:50,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2113286314] [2022-03-19 04:46:50,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2113286314] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:50,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:50,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 04:46:50,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099264934] [2022-03-19 04:46:50,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:50,793 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 04:46:50,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:50,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 04:46:50,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-19 04:46:50,793 INFO L87 Difference]: Start difference. First operand 522 states and 717 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 04:46:51,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:51,003 INFO L93 Difference]: Finished difference Result 735 states and 1041 transitions. [2022-03-19 04:46:51,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 04:46:51,011 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 107 [2022-03-19 04:46:51,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:51,013 INFO L225 Difference]: With dead ends: 735 [2022-03-19 04:46:51,013 INFO L226 Difference]: Without dead ends: 538 [2022-03-19 04:46:51,014 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=497, Invalid=693, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 04:46:51,014 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 119 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:51,014 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 265 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:46:51,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-03-19 04:46:51,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2022-03-19 04:46:51,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 410 states have (on average 1.2365853658536585) internal successors, (507), 410 states have internal predecessors, (507), 114 states have call successors, (114), 15 states have call predecessors, (114), 13 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2022-03-19 04:46:51,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 733 transitions. [2022-03-19 04:46:51,081 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 733 transitions. Word has length 107 [2022-03-19 04:46:51,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:51,081 INFO L478 AbstractCegarLoop]: Abstraction has 538 states and 733 transitions. [2022-03-19 04:46:51,081 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 04:46:51,081 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 733 transitions. [2022-03-19 04:46:51,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-19 04:46:51,098 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:51,098 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2022-03-19 04:46:51,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:51,302 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:51,302 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:51,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:51,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1965005106, now seen corresponding path program 5 times [2022-03-19 04:46:51,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:51,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1312267954] [2022-03-19 04:46:51,303 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:51,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1965005106, now seen corresponding path program 6 times [2022-03-19 04:46:51,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:51,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142616563] [2022-03-19 04:46:51,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:51,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:51,309 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:51,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617482085] [2022-03-19 04:46:51,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:46:51,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:51,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:51,310 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:46:51,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 04:46:51,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 04:46:51,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:51,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 04:46:51,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 22 proven. 292 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:51,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 22 proven. 72 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-19 04:46:51,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:51,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142616563] [2022-03-19 04:46:51,988 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:51,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617482085] [2022-03-19 04:46:51,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617482085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:51,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:51,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-03-19 04:46:51,988 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:51,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1312267954] [2022-03-19 04:46:51,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1312267954] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:51,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:51,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 04:46:51,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071211213] [2022-03-19 04:46:51,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:51,989 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 04:46:51,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:51,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 04:46:51,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-03-19 04:46:51,990 INFO L87 Difference]: Start difference. First operand 538 states and 733 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 14 states have internal predecessors, (78), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 04:46:52,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:52,268 INFO L93 Difference]: Finished difference Result 593 states and 810 transitions. [2022-03-19 04:46:52,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 04:46:52,268 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 14 states have internal predecessors, (78), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 111 [2022-03-19 04:46:52,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:52,270 INFO L225 Difference]: With dead ends: 593 [2022-03-19 04:46:52,270 INFO L226 Difference]: Without dead ends: 582 [2022-03-19 04:46:52,271 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=525, Invalid=735, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 04:46:52,272 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 148 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:52,272 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 281 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:46:52,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-03-19 04:46:52,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 560. [2022-03-19 04:46:52,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 418 states have (on average 1.2344497607655502) internal successors, (516), 428 states have internal predecessors, (516), 127 states have call successors, (127), 16 states have call predecessors, (127), 14 states have return successors, (125), 115 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-19 04:46:52,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 768 transitions. [2022-03-19 04:46:52,373 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 768 transitions. Word has length 111 [2022-03-19 04:46:52,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:52,374 INFO L478 AbstractCegarLoop]: Abstraction has 560 states and 768 transitions. [2022-03-19 04:46:52,374 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 14 states have internal predecessors, (78), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 04:46:52,374 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 768 transitions. [2022-03-19 04:46:52,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-19 04:46:52,375 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:52,375 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 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] [2022-03-19 04:46:52,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:52,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-19 04:46:52,579 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:52,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:52,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1038942829, now seen corresponding path program 13 times [2022-03-19 04:46:52,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:52,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [675184843] [2022-03-19 04:46:52,580 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:52,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1038942829, now seen corresponding path program 14 times [2022-03-19 04:46:52,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:52,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235695189] [2022-03-19 04:46:52,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:52,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:52,587 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:52,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690502767] [2022-03-19 04:46:52,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:46:52,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:52,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:52,593 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:46:52,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-19 04:46:52,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:46:52,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:52,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 04:46:52,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:52,875 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 46 proven. 56 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-19 04:46:52,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 34 proven. 68 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-19 04:46:53,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:53,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235695189] [2022-03-19 04:46:53,102 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:53,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690502767] [2022-03-19 04:46:53,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690502767] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:53,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:53,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 04:46:53,103 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:53,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [675184843] [2022-03-19 04:46:53,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [675184843] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:53,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:53,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 04:46:53,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883943871] [2022-03-19 04:46:53,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:53,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 04:46:53,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:53,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 04:46:53,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-19 04:46:53,104 INFO L87 Difference]: Start difference. First operand 560 states and 768 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 8 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-19 04:46:53,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:53,363 INFO L93 Difference]: Finished difference Result 862 states and 1224 transitions. [2022-03-19 04:46:53,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 04:46:53,364 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 8 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 113 [2022-03-19 04:46:53,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:53,367 INFO L225 Difference]: With dead ends: 862 [2022-03-19 04:46:53,367 INFO L226 Difference]: Without dead ends: 711 [2022-03-19 04:46:53,367 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2022-03-19 04:46:53,371 INFO L912 BasicCegarLoop]: 114 mSDtfsCounter, 67 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:53,371 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 506 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:46:53,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-03-19 04:46:53,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 560. [2022-03-19 04:46:53,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 418 states have (on average 1.2344497607655502) internal successors, (516), 428 states have internal predecessors, (516), 127 states have call successors, (127), 16 states have call predecessors, (127), 14 states have return successors, (125), 115 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-19 04:46:53,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 768 transitions. [2022-03-19 04:46:53,498 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 768 transitions. Word has length 113 [2022-03-19 04:46:53,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:53,499 INFO L478 AbstractCegarLoop]: Abstraction has 560 states and 768 transitions. [2022-03-19 04:46:53,499 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 8 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-19 04:46:53,499 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 768 transitions. [2022-03-19 04:46:53,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-19 04:46:53,500 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:53,500 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 6, 4, 4, 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] [2022-03-19 04:46:53,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:53,716 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:53,717 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:53,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:53,717 INFO L85 PathProgramCache]: Analyzing trace with hash -144297019, now seen corresponding path program 15 times [2022-03-19 04:46:53,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:53,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1800322479] [2022-03-19 04:46:53,717 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:53,718 INFO L85 PathProgramCache]: Analyzing trace with hash -144297019, now seen corresponding path program 16 times [2022-03-19 04:46:53,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:53,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551136683] [2022-03-19 04:46:53,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:53,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:53,722 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:53,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354414654] [2022-03-19 04:46:53,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:46:53,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:53,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:53,727 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:46:53,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-19 04:46:54,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:46:54,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:54,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 04:46:54,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 26 proven. 302 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:54,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 26 proven. 82 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-19 04:46:54,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:54,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551136683] [2022-03-19 04:46:54,844 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:54,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354414654] [2022-03-19 04:46:54,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354414654] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:54,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:54,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-03-19 04:46:54,845 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:54,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1800322479] [2022-03-19 04:46:54,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1800322479] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:54,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:54,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 04:46:54,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983839449] [2022-03-19 04:46:54,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:54,845 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 04:46:54,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:54,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 04:46:54,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-03-19 04:46:54,846 INFO L87 Difference]: Start difference. First operand 560 states and 768 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 14 states have internal predecessors, (80), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 04:46:55,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:55,214 INFO L93 Difference]: Finished difference Result 781 states and 1101 transitions. [2022-03-19 04:46:55,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 04:46:55,214 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 14 states have internal predecessors, (80), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 113 [2022-03-19 04:46:55,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:55,216 INFO L225 Difference]: With dead ends: 781 [2022-03-19 04:46:55,216 INFO L226 Difference]: Without dead ends: 588 [2022-03-19 04:46:55,217 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=555, Invalid=777, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 04:46:55,217 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 149 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:55,218 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 278 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:46:55,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-03-19 04:46:55,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 578. [2022-03-19 04:46:55,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 436 states have (on average 1.2339449541284404) internal successors, (538), 440 states have internal predecessors, (538), 127 states have call successors, (127), 16 states have call predecessors, (127), 14 states have return successors, (125), 121 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-19 04:46:55,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 790 transitions. [2022-03-19 04:46:55,313 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 790 transitions. Word has length 113 [2022-03-19 04:46:55,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:55,313 INFO L478 AbstractCegarLoop]: Abstraction has 578 states and 790 transitions. [2022-03-19 04:46:55,313 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 14 states have internal predecessors, (80), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 04:46:55,313 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 790 transitions. [2022-03-19 04:46:55,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-19 04:46:55,314 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:55,314 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2022-03-19 04:46:55,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:55,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-19 04:46:55,520 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:55,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:55,520 INFO L85 PathProgramCache]: Analyzing trace with hash 533963976, now seen corresponding path program 13 times [2022-03-19 04:46:55,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:55,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1276313737] [2022-03-19 04:46:55,520 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:55,520 INFO L85 PathProgramCache]: Analyzing trace with hash 533963976, now seen corresponding path program 14 times [2022-03-19 04:46:55,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:55,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549902358] [2022-03-19 04:46:55,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:55,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:55,525 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:55,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [34785379] [2022-03-19 04:46:55,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:46:55,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:55,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:55,526 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:46:55,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-19 04:46:55,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:46:55,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:55,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 04:46:55,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:55,810 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 36 proven. 288 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:55,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 36 proven. 68 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-19 04:46:56,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:56,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549902358] [2022-03-19 04:46:56,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:56,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34785379] [2022-03-19 04:46:56,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34785379] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:56,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:56,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-03-19 04:46:56,110 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:56,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1276313737] [2022-03-19 04:46:56,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1276313737] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:56,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:56,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 04:46:56,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075533809] [2022-03-19 04:46:56,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:56,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 04:46:56,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:56,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 04:46:56,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-03-19 04:46:56,112 INFO L87 Difference]: Start difference. First operand 578 states and 790 transitions. Second operand has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 04:46:56,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:56,426 INFO L93 Difference]: Finished difference Result 791 states and 1114 transitions. [2022-03-19 04:46:56,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 04:46:56,427 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 115 [2022-03-19 04:46:56,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:56,429 INFO L225 Difference]: With dead ends: 791 [2022-03-19 04:46:56,429 INFO L226 Difference]: Without dead ends: 594 [2022-03-19 04:46:56,429 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=590, Invalid=816, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 04:46:56,430 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 203 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:56,430 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 250 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:46:56,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-03-19 04:46:56,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 594. [2022-03-19 04:46:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 452 states have (on average 1.2256637168141593) internal successors, (554), 452 states have internal predecessors, (554), 127 states have call successors, (127), 16 states have call predecessors, (127), 14 states have return successors, (125), 125 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-19 04:46:56,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 806 transitions. [2022-03-19 04:46:56,510 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 806 transitions. Word has length 115 [2022-03-19 04:46:56,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:56,510 INFO L478 AbstractCegarLoop]: Abstraction has 594 states and 806 transitions. [2022-03-19 04:46:56,510 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 04:46:56,511 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 806 transitions. [2022-03-19 04:46:56,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-19 04:46:56,512 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:56,512 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 6, 4, 4, 4, 4, 4, 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] [2022-03-19 04:46:56,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:56,716 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-19 04:46:56,716 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:56,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:56,716 INFO L85 PathProgramCache]: Analyzing trace with hash 650985841, now seen corresponding path program 7 times [2022-03-19 04:46:56,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:56,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [30358287] [2022-03-19 04:46:56,717 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:56,717 INFO L85 PathProgramCache]: Analyzing trace with hash 650985841, now seen corresponding path program 8 times [2022-03-19 04:46:56,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:56,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496670483] [2022-03-19 04:46:56,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:56,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:56,722 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:56,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532000573] [2022-03-19 04:46:56,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:46:56,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:56,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:56,723 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:46:56,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-19 04:46:56,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:46:56,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:56,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 04:46:56,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 24 proven. 356 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:57,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:57,381 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 24 proven. 92 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-19 04:46:57,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:57,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496670483] [2022-03-19 04:46:57,381 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:57,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532000573] [2022-03-19 04:46:57,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532000573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:57,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:57,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-03-19 04:46:57,381 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:57,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [30358287] [2022-03-19 04:46:57,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [30358287] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:57,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:57,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 04:46:57,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121952715] [2022-03-19 04:46:57,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:57,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 04:46:57,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:57,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 04:46:57,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-03-19 04:46:57,383 INFO L87 Difference]: Start difference. First operand 594 states and 806 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 15 states have internal predecessors, (84), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 04:46:57,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:57,670 INFO L93 Difference]: Finished difference Result 649 states and 883 transitions. [2022-03-19 04:46:57,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 04:46:57,671 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 15 states have internal predecessors, (84), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 119 [2022-03-19 04:46:57,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:57,676 INFO L225 Difference]: With dead ends: 649 [2022-03-19 04:46:57,676 INFO L226 Difference]: Without dead ends: 638 [2022-03-19 04:46:57,676 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=620, Invalid=862, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 04:46:57,677 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 235 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:57,677 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 276 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:46:57,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-03-19 04:46:57,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 616. [2022-03-19 04:46:57,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 460 states have (on average 1.2239130434782608) internal successors, (563), 470 states have internal predecessors, (563), 140 states have call successors, (140), 17 states have call predecessors, (140), 15 states have return successors, (138), 128 states have call predecessors, (138), 138 states have call successors, (138) [2022-03-19 04:46:57,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 841 transitions. [2022-03-19 04:46:57,793 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 841 transitions. Word has length 119 [2022-03-19 04:46:57,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:57,794 INFO L478 AbstractCegarLoop]: Abstraction has 616 states and 841 transitions. [2022-03-19 04:46:57,794 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 15 states have internal predecessors, (84), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 04:46:57,794 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 841 transitions. [2022-03-19 04:46:57,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-19 04:46:57,795 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:57,795 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 7, 7, 7, 5, 4, 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] [2022-03-19 04:46:57,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:58,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-19 04:46:58,012 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:58,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:58,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1267134888, now seen corresponding path program 17 times [2022-03-19 04:46:58,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:58,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [787417434] [2022-03-19 04:46:58,013 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:58,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1267134888, now seen corresponding path program 18 times [2022-03-19 04:46:58,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:58,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755090229] [2022-03-19 04:46:58,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:58,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:58,018 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:58,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461880651] [2022-03-19 04:46:58,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:46:58,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:58,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:58,019 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:46:58,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-19 04:46:58,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-19 04:46:58,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:58,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 04:46:58,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 28 proven. 370 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:46:58,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:59,315 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 28 proven. 106 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-19 04:46:59,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:59,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755090229] [2022-03-19 04:46:59,316 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:59,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461880651] [2022-03-19 04:46:59,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461880651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:59,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:59,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-03-19 04:46:59,316 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:59,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [787417434] [2022-03-19 04:46:59,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [787417434] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:59,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:59,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 04:46:59,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216919398] [2022-03-19 04:46:59,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:59,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 04:46:59,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:59,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 04:46:59,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-03-19 04:46:59,318 INFO L87 Difference]: Start difference. First operand 616 states and 841 transitions. Second operand has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 04:46:59,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:59,676 INFO L93 Difference]: Finished difference Result 837 states and 1174 transitions. [2022-03-19 04:46:59,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 04:46:59,676 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 121 [2022-03-19 04:46:59,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:59,679 INFO L225 Difference]: With dead ends: 837 [2022-03-19 04:46:59,679 INFO L226 Difference]: Without dead ends: 644 [2022-03-19 04:46:59,680 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=653, Invalid=907, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 04:46:59,680 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 152 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:59,681 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 302 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:46:59,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-03-19 04:46:59,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 634. [2022-03-19 04:46:59,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 478 states have (on average 1.2238493723849373) internal successors, (585), 482 states have internal predecessors, (585), 140 states have call successors, (140), 17 states have call predecessors, (140), 15 states have return successors, (138), 134 states have call predecessors, (138), 138 states have call successors, (138) [2022-03-19 04:46:59,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 863 transitions. [2022-03-19 04:46:59,779 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 863 transitions. Word has length 121 [2022-03-19 04:46:59,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:59,780 INFO L478 AbstractCegarLoop]: Abstraction has 634 states and 863 transitions. [2022-03-19 04:46:59,780 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 04:46:59,780 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 863 transitions. [2022-03-19 04:46:59,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-19 04:46:59,781 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:59,781 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:46:59,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:59,986 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-19 04:46:59,986 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:59,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:59,987 INFO L85 PathProgramCache]: Analyzing trace with hash 487500267, now seen corresponding path program 15 times [2022-03-19 04:46:59,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:59,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1161981834] [2022-03-19 04:46:59,987 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:59,988 INFO L85 PathProgramCache]: Analyzing trace with hash 487500267, now seen corresponding path program 16 times [2022-03-19 04:46:59,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:59,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902607063] [2022-03-19 04:46:59,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:59,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:59,993 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:59,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779530005] [2022-03-19 04:46:59,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:46:59,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:59,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:59,998 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:46:59,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-19 04:47:00,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:47:00,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:00,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 04:47:00,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 38 proven. 350 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:47:00,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 38 proven. 86 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-19 04:47:00,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:00,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902607063] [2022-03-19 04:47:00,738 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:00,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779530005] [2022-03-19 04:47:00,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779530005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:00,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:00,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-03-19 04:47:00,738 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:00,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1161981834] [2022-03-19 04:47:00,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1161981834] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:00,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:00,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 04:47:00,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56217742] [2022-03-19 04:47:00,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:00,739 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 04:47:00,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:00,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 04:47:00,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-03-19 04:47:00,740 INFO L87 Difference]: Start difference. First operand 634 states and 863 transitions. Second operand has 16 states, 16 states have (on average 5.5) internal successors, (88), 15 states have internal predecessors, (88), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 04:47:01,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:01,111 INFO L93 Difference]: Finished difference Result 847 states and 1187 transitions. [2022-03-19 04:47:01,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 04:47:01,111 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.5) internal successors, (88), 15 states have internal predecessors, (88), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 123 [2022-03-19 04:47:01,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:01,113 INFO L225 Difference]: With dead ends: 847 [2022-03-19 04:47:01,113 INFO L226 Difference]: Without dead ends: 650 [2022-03-19 04:47:01,114 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=691, Invalid=949, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 04:47:01,114 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 179 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:01,115 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 295 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:47:01,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-03-19 04:47:01,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 650. [2022-03-19 04:47:01,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 494 states have (on average 1.2165991902834008) internal successors, (601), 494 states have internal predecessors, (601), 140 states have call successors, (140), 17 states have call predecessors, (140), 15 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2022-03-19 04:47:01,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 879 transitions. [2022-03-19 04:47:01,211 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 879 transitions. Word has length 123 [2022-03-19 04:47:01,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:01,211 INFO L478 AbstractCegarLoop]: Abstraction has 650 states and 879 transitions. [2022-03-19 04:47:01,211 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5) internal successors, (88), 15 states have internal predecessors, (88), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 04:47:01,212 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 879 transitions. [2022-03-19 04:47:01,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-19 04:47:01,213 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:01,213 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 7, 7, 7, 7, 5, 4, 4, 4, 4, 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] [2022-03-19 04:47:01,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-19 04:47:01,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:01,427 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:01,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:01,428 INFO L85 PathProgramCache]: Analyzing trace with hash -992818924, now seen corresponding path program 9 times [2022-03-19 04:47:01,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:01,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1605015627] [2022-03-19 04:47:01,428 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:01,428 INFO L85 PathProgramCache]: Analyzing trace with hash -992818924, now seen corresponding path program 10 times [2022-03-19 04:47:01,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:01,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030912282] [2022-03-19 04:47:01,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:01,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:01,434 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:01,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644144209] [2022-03-19 04:47:01,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:47:01,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:01,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:01,435 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:47:01,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-19 04:47:01,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:47:01,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:01,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 04:47:01,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:01,752 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 26 proven. 428 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:47:01,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:02,090 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 26 proven. 116 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-19 04:47:02,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:02,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030912282] [2022-03-19 04:47:02,091 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:02,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644144209] [2022-03-19 04:47:02,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644144209] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:02,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:02,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-03-19 04:47:02,091 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:02,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1605015627] [2022-03-19 04:47:02,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1605015627] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:02,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:02,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 04:47:02,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721025534] [2022-03-19 04:47:02,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:02,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 04:47:02,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:02,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 04:47:02,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-03-19 04:47:02,093 INFO L87 Difference]: Start difference. First operand 650 states and 879 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 16 states have internal predecessors, (90), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 04:47:02,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:02,417 INFO L93 Difference]: Finished difference Result 705 states and 956 transitions. [2022-03-19 04:47:02,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 04:47:02,419 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 16 states have internal predecessors, (90), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 127 [2022-03-19 04:47:02,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:02,422 INFO L225 Difference]: With dead ends: 705 [2022-03-19 04:47:02,422 INFO L226 Difference]: Without dead ends: 694 [2022-03-19 04:47:02,423 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=723, Invalid=999, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 04:47:02,424 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 202 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:02,424 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 313 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:47:02,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-03-19 04:47:02,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 672. [2022-03-19 04:47:02,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 502 states have (on average 1.2151394422310757) internal successors, (610), 512 states have internal predecessors, (610), 153 states have call successors, (153), 18 states have call predecessors, (153), 16 states have return successors, (151), 141 states have call predecessors, (151), 151 states have call successors, (151) [2022-03-19 04:47:02,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 914 transitions. [2022-03-19 04:47:02,529 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 914 transitions. Word has length 127 [2022-03-19 04:47:02,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:02,529 INFO L478 AbstractCegarLoop]: Abstraction has 672 states and 914 transitions. [2022-03-19 04:47:02,529 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 16 states have internal predecessors, (90), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 04:47:02,529 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 914 transitions. [2022-03-19 04:47:02,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-19 04:47:02,531 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:02,531 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:47:02,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-19 04:47:02,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:02,747 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:02,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:02,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1410231607, now seen corresponding path program 19 times [2022-03-19 04:47:02,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:02,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [808686140] [2022-03-19 04:47:02,748 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:02,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1410231607, now seen corresponding path program 20 times [2022-03-19 04:47:02,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:02,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414890501] [2022-03-19 04:47:02,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:02,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:02,752 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:02,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573037576] [2022-03-19 04:47:02,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:47:02,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:02,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:02,763 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:47:02,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-19 04:47:02,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:47:02,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:02,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 04:47:02,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 32 proven. 416 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:47:03,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 32 proven. 104 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-19 04:47:03,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:03,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414890501] [2022-03-19 04:47:03,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:03,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573037576] [2022-03-19 04:47:03,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573037576] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:03,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:03,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-03-19 04:47:03,601 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:03,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [808686140] [2022-03-19 04:47:03,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [808686140] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:03,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:03,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 04:47:03,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020033001] [2022-03-19 04:47:03,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:03,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 04:47:03,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:03,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 04:47:03,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-03-19 04:47:03,603 INFO L87 Difference]: Start difference. First operand 672 states and 914 transitions. Second operand has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 16 states have internal predecessors, (92), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 04:47:04,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:04,072 INFO L93 Difference]: Finished difference Result 893 states and 1247 transitions. [2022-03-19 04:47:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 04:47:04,073 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 16 states have internal predecessors, (92), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 129 [2022-03-19 04:47:04,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:04,076 INFO L225 Difference]: With dead ends: 893 [2022-03-19 04:47:04,076 INFO L226 Difference]: Without dead ends: 700 [2022-03-19 04:47:04,077 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1047, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 04:47:04,077 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 182 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:04,078 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 309 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:47:04,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-03-19 04:47:04,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 690. [2022-03-19 04:47:04,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 520 states have (on average 1.2153846153846153) internal successors, (632), 524 states have internal predecessors, (632), 153 states have call successors, (153), 18 states have call predecessors, (153), 16 states have return successors, (151), 147 states have call predecessors, (151), 151 states have call successors, (151) [2022-03-19 04:47:04,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 936 transitions. [2022-03-19 04:47:04,219 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 936 transitions. Word has length 129 [2022-03-19 04:47:04,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:04,219 INFO L478 AbstractCegarLoop]: Abstraction has 690 states and 936 transitions. [2022-03-19 04:47:04,219 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 16 states have internal predecessors, (92), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 04:47:04,219 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 936 transitions. [2022-03-19 04:47:04,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-19 04:47:04,221 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:04,221 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:47:04,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-19 04:47:04,436 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-19 04:47:04,436 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:04,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:04,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1255136270, now seen corresponding path program 17 times [2022-03-19 04:47:04,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:04,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [832319255] [2022-03-19 04:47:04,437 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:04,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1255136270, now seen corresponding path program 18 times [2022-03-19 04:47:04,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:04,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256978447] [2022-03-19 04:47:04,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:04,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:04,441 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:04,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767532287] [2022-03-19 04:47:04,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:47:04,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:04,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:04,448 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:47:04,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-19 04:47:04,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 04:47:04,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:04,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 04:47:04,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 40 proven. 420 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:47:04,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 40 proven. 108 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-19 04:47:05,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:05,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256978447] [2022-03-19 04:47:05,254 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:05,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767532287] [2022-03-19 04:47:05,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767532287] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:05,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:05,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-03-19 04:47:05,254 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:05,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [832319255] [2022-03-19 04:47:05,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [832319255] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:05,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:05,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 04:47:05,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38407352] [2022-03-19 04:47:05,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:05,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 04:47:05,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:05,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 04:47:05,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-03-19 04:47:05,255 INFO L87 Difference]: Start difference. First operand 690 states and 936 transitions. Second operand has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 16 states have internal predecessors, (94), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 04:47:05,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:05,693 INFO L93 Difference]: Finished difference Result 903 states and 1260 transitions. [2022-03-19 04:47:05,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 04:47:05,694 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 16 states have internal predecessors, (94), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 131 [2022-03-19 04:47:05,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:05,697 INFO L225 Difference]: With dead ends: 903 [2022-03-19 04:47:05,697 INFO L226 Difference]: Without dead ends: 706 [2022-03-19 04:47:05,698 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=800, Invalid=1092, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 04:47:05,698 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 276 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:05,699 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 288 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:47:05,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-03-19 04:47:05,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 706. [2022-03-19 04:47:05,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 536 states have (on average 1.208955223880597) internal successors, (648), 536 states have internal predecessors, (648), 153 states have call successors, (153), 18 states have call predecessors, (153), 16 states have return successors, (151), 151 states have call predecessors, (151), 151 states have call successors, (151) [2022-03-19 04:47:05,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 952 transitions. [2022-03-19 04:47:05,854 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 952 transitions. Word has length 131 [2022-03-19 04:47:05,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:05,854 INFO L478 AbstractCegarLoop]: Abstraction has 706 states and 952 transitions. [2022-03-19 04:47:05,854 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 16 states have internal predecessors, (94), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 04:47:05,855 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 952 transitions. [2022-03-19 04:47:05,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 04:47:05,857 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:05,857 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:47:05,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-19 04:47:06,062 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:06,062 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:06,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:06,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1252937077, now seen corresponding path program 11 times [2022-03-19 04:47:06,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:06,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [330270131] [2022-03-19 04:47:06,063 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:06,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1252937077, now seen corresponding path program 12 times [2022-03-19 04:47:06,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:06,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574619735] [2022-03-19 04:47:06,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:06,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:06,069 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:06,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912204086] [2022-03-19 04:47:06,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:47:06,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:06,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:06,071 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:47:06,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-19 04:47:06,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 04:47:06,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:06,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 04:47:06,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:06,469 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 88 proven. 1 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2022-03-19 04:47:06,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:08,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:08,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574619735] [2022-03-19 04:47:08,585 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:08,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912204086] [2022-03-19 04:47:08,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912204086] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:47:08,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:47:08,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-19 04:47:08,585 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:08,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [330270131] [2022-03-19 04:47:08,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [330270131] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:08,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:08,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 04:47:08,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754548845] [2022-03-19 04:47:08,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:08,586 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 04:47:08,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:08,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 04:47:08,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=84, Unknown=1, NotChecked=0, Total=110 [2022-03-19 04:47:08,587 INFO L87 Difference]: Start difference. First operand 706 states and 952 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 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) [2022-03-19 04:47:10,639 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 04:47:10,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:10,889 INFO L93 Difference]: Finished difference Result 758 states and 1028 transitions. [2022-03-19 04:47:10,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 04:47:10,889 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 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 135 [2022-03-19 04:47:10,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:10,892 INFO L225 Difference]: With dead ends: 758 [2022-03-19 04:47:10,892 INFO L226 Difference]: Without dead ends: 746 [2022-03-19 04:47:10,892 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=43, Invalid=138, Unknown=1, NotChecked=0, Total=182 [2022-03-19 04:47:10,893 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 35 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:10,893 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 255 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 104 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-03-19 04:47:10,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-03-19 04:47:11,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 683. [2022-03-19 04:47:11,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 515 states have (on average 1.192233009708738) internal successors, (614), 522 states have internal predecessors, (614), 150 states have call successors, (150), 19 states have call predecessors, (150), 17 states have return successors, (148), 141 states have call predecessors, (148), 148 states have call successors, (148) [2022-03-19 04:47:11,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 912 transitions. [2022-03-19 04:47:11,026 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 912 transitions. Word has length 135 [2022-03-19 04:47:11,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:11,027 INFO L478 AbstractCegarLoop]: Abstraction has 683 states and 912 transitions. [2022-03-19 04:47:11,027 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 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) [2022-03-19 04:47:11,027 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 912 transitions. [2022-03-19 04:47:11,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 04:47:11,028 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:11,028 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 8, 8, 8, 8, 6, 4, 4, 4, 4, 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] [2022-03-19 04:47:11,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-19 04:47:11,232 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-19 04:47:11,233 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:11,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:11,233 INFO L85 PathProgramCache]: Analyzing trace with hash 200539575, now seen corresponding path program 13 times [2022-03-19 04:47:11,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:11,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1922197194] [2022-03-19 04:47:11,234 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:11,234 INFO L85 PathProgramCache]: Analyzing trace with hash 200539575, now seen corresponding path program 14 times [2022-03-19 04:47:11,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:11,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905139389] [2022-03-19 04:47:11,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:11,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:11,244 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:11,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628964486] [2022-03-19 04:47:11,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:47:11,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:11,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:11,246 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:47:11,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-19 04:47:11,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:47:11,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:11,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 04:47:11,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 28 proven. 508 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:47:11,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 28 proven. 144 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-19 04:47:12,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:12,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905139389] [2022-03-19 04:47:12,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:12,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628964486] [2022-03-19 04:47:12,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628964486] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:12,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:12,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-19 04:47:12,224 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:12,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1922197194] [2022-03-19 04:47:12,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1922197194] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:12,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:12,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 04:47:12,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276584113] [2022-03-19 04:47:12,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:12,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 04:47:12,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:12,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 04:47:12,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 04:47:12,225 INFO L87 Difference]: Start difference. First operand 683 states and 912 transitions. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 17 states have internal predecessors, (96), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 04:47:12,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:12,643 INFO L93 Difference]: Finished difference Result 734 states and 982 transitions. [2022-03-19 04:47:12,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 04:47:12,644 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 17 states have internal predecessors, (96), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 135 [2022-03-19 04:47:12,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:12,647 INFO L225 Difference]: With dead ends: 734 [2022-03-19 04:47:12,647 INFO L226 Difference]: Without dead ends: 729 [2022-03-19 04:47:12,648 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=834, Invalid=1146, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 04:47:12,649 INFO L912 BasicCegarLoop]: 72 mSDtfsCounter, 221 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:12,649 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 336 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:47:12,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-03-19 04:47:12,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 707. [2022-03-19 04:47:12,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 525 states have (on average 1.1923809523809523) internal successors, (626), 542 states have internal predecessors, (626), 163 states have call successors, (163), 20 states have call predecessors, (163), 18 states have return successors, (161), 144 states have call predecessors, (161), 161 states have call successors, (161) [2022-03-19 04:47:12,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 950 transitions. [2022-03-19 04:47:12,782 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 950 transitions. Word has length 135 [2022-03-19 04:47:12,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:12,782 INFO L478 AbstractCegarLoop]: Abstraction has 707 states and 950 transitions. [2022-03-19 04:47:12,782 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 17 states have internal predecessors, (96), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 04:47:12,782 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 950 transitions. [2022-03-19 04:47:12,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-19 04:47:12,784 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:12,784 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:47:12,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-19 04:47:12,999 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:12,999 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:13,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:13,000 INFO L85 PathProgramCache]: Analyzing trace with hash -972958086, now seen corresponding path program 21 times [2022-03-19 04:47:13,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:13,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1650624257] [2022-03-19 04:47:13,000 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:13,000 INFO L85 PathProgramCache]: Analyzing trace with hash -972958086, now seen corresponding path program 22 times [2022-03-19 04:47:13,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:13,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912506584] [2022-03-19 04:47:13,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:13,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:13,005 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:13,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [939874525] [2022-03-19 04:47:13,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:47:13,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:13,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:13,006 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:47:13,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-19 04:47:13,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:47:13,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:13,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 04:47:13,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:14,489 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 47 proven. 112 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2022-03-19 04:47:14,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 67 proven. 92 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2022-03-19 04:47:15,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:15,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912506584] [2022-03-19 04:47:15,012 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:15,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939874525] [2022-03-19 04:47:15,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939874525] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:15,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:15,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-03-19 04:47:15,012 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:15,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1650624257] [2022-03-19 04:47:15,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1650624257] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:15,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:15,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 04:47:15,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815896076] [2022-03-19 04:47:15,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:15,013 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 04:47:15,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:15,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 04:47:15,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-03-19 04:47:15,014 INFO L87 Difference]: Start difference. First operand 707 states and 950 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-19 04:47:17,201 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 04:47:17,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:17,477 INFO L93 Difference]: Finished difference Result 964 states and 1336 transitions. [2022-03-19 04:47:17,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 04:47:17,477 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) Word has length 137 [2022-03-19 04:47:17,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:17,480 INFO L225 Difference]: With dead ends: 964 [2022-03-19 04:47:17,480 INFO L226 Difference]: Without dead ends: 851 [2022-03-19 04:47:17,481 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-03-19 04:47:17,481 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 28 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:17,481 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 591 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 1 Unknown, 138 Unchecked, 2.1s Time] [2022-03-19 04:47:17,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-03-19 04:47:17,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 707. [2022-03-19 04:47:17,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 525 states have (on average 1.1923809523809523) internal successors, (626), 542 states have internal predecessors, (626), 163 states have call successors, (163), 20 states have call predecessors, (163), 18 states have return successors, (161), 144 states have call predecessors, (161), 161 states have call successors, (161) [2022-03-19 04:47:17,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 950 transitions. [2022-03-19 04:47:17,594 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 950 transitions. Word has length 137 [2022-03-19 04:47:17,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:17,594 INFO L478 AbstractCegarLoop]: Abstraction has 707 states and 950 transitions. [2022-03-19 04:47:17,594 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-19 04:47:17,594 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 950 transitions. [2022-03-19 04:47:17,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-19 04:47:17,596 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:17,596 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:47:17,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-19 04:47:17,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:17,799 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:17,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:17,800 INFO L85 PathProgramCache]: Analyzing trace with hash -134259028, now seen corresponding path program 23 times [2022-03-19 04:47:17,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:17,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1776287341] [2022-03-19 04:47:17,800 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:17,800 INFO L85 PathProgramCache]: Analyzing trace with hash -134259028, now seen corresponding path program 24 times [2022-03-19 04:47:17,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:17,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788195529] [2022-03-19 04:47:17,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:17,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:17,805 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:17,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970252713] [2022-03-19 04:47:17,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:47:17,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:17,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:17,806 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:47:17,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-19 04:47:17,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 04:47:17,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:17,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 04:47:17,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 28 proven. 498 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:47:18,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:18,756 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-19 04:47:18,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:18,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788195529] [2022-03-19 04:47:18,756 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:18,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970252713] [2022-03-19 04:47:18,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970252713] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:18,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:18,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-03-19 04:47:18,757 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:18,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1776287341] [2022-03-19 04:47:18,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1776287341] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:18,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:18,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 04:47:18,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61012143] [2022-03-19 04:47:18,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:18,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 04:47:18,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:18,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 04:47:18,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 04:47:18,758 INFO L87 Difference]: Start difference. First operand 707 states and 950 transitions. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 04:47:19,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:19,298 INFO L93 Difference]: Finished difference Result 807 states and 1089 transitions. [2022-03-19 04:47:19,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 04:47:19,299 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 137 [2022-03-19 04:47:19,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:19,302 INFO L225 Difference]: With dead ends: 807 [2022-03-19 04:47:19,302 INFO L226 Difference]: Without dead ends: 802 [2022-03-19 04:47:19,302 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1303, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 04:47:19,303 INFO L912 BasicCegarLoop]: 75 mSDtfsCounter, 319 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:19,303 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 337 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:47:19,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-03-19 04:47:19,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 775. [2022-03-19 04:47:19,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 579 states have (on average 1.2037996545768566) internal successors, (697), 596 states have internal predecessors, (697), 176 states have call successors, (176), 21 states have call predecessors, (176), 19 states have return successors, (174), 157 states have call predecessors, (174), 174 states have call successors, (174) [2022-03-19 04:47:19,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1047 transitions. [2022-03-19 04:47:19,435 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1047 transitions. Word has length 137 [2022-03-19 04:47:19,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:19,435 INFO L478 AbstractCegarLoop]: Abstraction has 775 states and 1047 transitions. [2022-03-19 04:47:19,435 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 04:47:19,435 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1047 transitions. [2022-03-19 04:47:19,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-19 04:47:19,436 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:19,437 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 8, 7, 7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:47:19,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-19 04:47:19,642 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-19 04:47:19,642 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:19,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:19,642 INFO L85 PathProgramCache]: Analyzing trace with hash -895861967, now seen corresponding path program 19 times [2022-03-19 04:47:19,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:19,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1597595477] [2022-03-19 04:47:19,643 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:19,643 INFO L85 PathProgramCache]: Analyzing trace with hash -895861967, now seen corresponding path program 20 times [2022-03-19 04:47:19,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:19,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247161623] [2022-03-19 04:47:19,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:19,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:19,647 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:19,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510190262] [2022-03-19 04:47:19,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:47:19,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:19,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:19,649 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:47:19,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-19 04:47:19,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:47:19,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:19,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 04:47:19,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:20,038 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 42 proven. 498 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:47:20,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 42 proven. 134 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-19 04:47:20,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:20,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247161623] [2022-03-19 04:47:20,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:20,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510190262] [2022-03-19 04:47:20,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510190262] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:20,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:20,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-19 04:47:20,506 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:20,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1597595477] [2022-03-19 04:47:20,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1597595477] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:20,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:20,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 04:47:20,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820910816] [2022-03-19 04:47:20,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:20,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 04:47:20,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:20,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 04:47:20,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 04:47:20,508 INFO L87 Difference]: Start difference. First operand 775 states and 1047 transitions. Second operand has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 17 states have internal predecessors, (100), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 04:47:20,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:20,981 INFO L93 Difference]: Finished difference Result 945 states and 1302 transitions. [2022-03-19 04:47:20,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 04:47:20,981 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 17 states have internal predecessors, (100), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 139 [2022-03-19 04:47:20,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:20,984 INFO L225 Difference]: With dead ends: 945 [2022-03-19 04:47:20,984 INFO L226 Difference]: Without dead ends: 775 [2022-03-19 04:47:20,985 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=917, Invalid=1245, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 04:47:20,985 INFO L912 BasicCegarLoop]: 72 mSDtfsCounter, 255 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:20,986 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 325 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:47:20,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-03-19 04:47:21,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 775. [2022-03-19 04:47:21,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 579 states have (on average 1.1934369602763386) internal successors, (691), 596 states have internal predecessors, (691), 176 states have call successors, (176), 21 states have call predecessors, (176), 19 states have return successors, (174), 157 states have call predecessors, (174), 174 states have call successors, (174) [2022-03-19 04:47:21,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1041 transitions. [2022-03-19 04:47:21,132 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1041 transitions. Word has length 139 [2022-03-19 04:47:21,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:21,132 INFO L478 AbstractCegarLoop]: Abstraction has 775 states and 1041 transitions. [2022-03-19 04:47:21,132 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 17 states have internal predecessors, (100), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 04:47:21,132 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1041 transitions. [2022-03-19 04:47:21,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-19 04:47:21,134 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:21,134 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 7, 7, 7, 7, 6, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:47:21,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-19 04:47:21,350 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-19 04:47:21,351 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:21,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:21,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1908608861, now seen corresponding path program 25 times [2022-03-19 04:47:21,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:21,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2119226559] [2022-03-19 04:47:21,351 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:21,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1908608861, now seen corresponding path program 26 times [2022-03-19 04:47:21,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:21,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722188009] [2022-03-19 04:47:21,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:21,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:21,360 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:21,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869437903] [2022-03-19 04:47:21,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:47:21,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:21,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:21,362 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:47:21,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-19 04:47:21,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:47:21,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:21,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 04:47:21,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 36 proven. 566 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:47:21,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:22,246 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 36 proven. 146 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-19 04:47:22,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:22,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722188009] [2022-03-19 04:47:22,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:22,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869437903] [2022-03-19 04:47:22,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869437903] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:22,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:22,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-03-19 04:47:22,247 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:22,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2119226559] [2022-03-19 04:47:22,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2119226559] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:22,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:22,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 04:47:22,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494841948] [2022-03-19 04:47:22,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:22,248 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 04:47:22,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:22,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 04:47:22,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 04:47:22,249 INFO L87 Difference]: Start difference. First operand 775 states and 1041 transitions. Second operand has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-19 04:47:22,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:22,812 INFO L93 Difference]: Finished difference Result 981 states and 1345 transitions. [2022-03-19 04:47:22,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 04:47:22,813 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) Word has length 145 [2022-03-19 04:47:22,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:22,817 INFO L225 Difference]: With dead ends: 981 [2022-03-19 04:47:22,817 INFO L226 Difference]: Without dead ends: 789 [2022-03-19 04:47:22,819 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=995, Invalid=1357, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 04:47:22,819 INFO L912 BasicCegarLoop]: 75 mSDtfsCounter, 297 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:22,819 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 312 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:47:22,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-03-19 04:47:23,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 778. [2022-03-19 04:47:23,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 582 states have (on average 1.1872852233676976) internal successors, (691), 594 states have internal predecessors, (691), 176 states have call successors, (176), 21 states have call predecessors, (176), 19 states have return successors, (174), 162 states have call predecessors, (174), 174 states have call successors, (174) [2022-03-19 04:47:23,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1041 transitions. [2022-03-19 04:47:23,017 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1041 transitions. Word has length 145 [2022-03-19 04:47:23,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:23,017 INFO L478 AbstractCegarLoop]: Abstraction has 778 states and 1041 transitions. [2022-03-19 04:47:23,017 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-19 04:47:23,017 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1041 transitions. [2022-03-19 04:47:23,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-19 04:47:23,019 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:23,019 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 9, 8, 8, 8, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:47:23,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-19 04:47:23,229 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-19 04:47:23,230 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:23,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:23,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1963931820, now seen corresponding path program 21 times [2022-03-19 04:47:23,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:23,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [8640553] [2022-03-19 04:47:23,230 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:23,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1963931820, now seen corresponding path program 22 times [2022-03-19 04:47:23,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:23,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557189953] [2022-03-19 04:47:23,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:23,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:23,235 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:23,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399728062] [2022-03-19 04:47:23,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:47:23,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:23,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:23,236 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:47:23,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-19 04:47:23,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:47:23,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:23,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 04:47:23,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:23,842 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 44 proven. 584 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:47:23,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:24,373 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 44 proven. 164 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-19 04:47:24,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:24,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557189953] [2022-03-19 04:47:24,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:24,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399728062] [2022-03-19 04:47:24,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399728062] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:24,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:24,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-03-19 04:47:24,375 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:24,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [8640553] [2022-03-19 04:47:24,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [8640553] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:24,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:24,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 04:47:24,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736908613] [2022-03-19 04:47:24,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:24,375 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 04:47:24,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:24,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 04:47:24,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 04:47:24,376 INFO L87 Difference]: Start difference. First operand 778 states and 1041 transitions. Second operand has 19 states, 19 states have (on average 5.578947368421052) internal successors, (106), 18 states have internal predecessors, (106), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-19 04:47:24,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:24,919 INFO L93 Difference]: Finished difference Result 965 states and 1319 transitions. [2022-03-19 04:47:24,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 04:47:24,919 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.578947368421052) internal successors, (106), 18 states have internal predecessors, (106), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) Word has length 147 [2022-03-19 04:47:24,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:24,923 INFO L225 Difference]: With dead ends: 965 [2022-03-19 04:47:24,923 INFO L226 Difference]: Without dead ends: 795 [2022-03-19 04:47:24,924 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1042, Invalid=1408, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 04:47:24,925 INFO L912 BasicCegarLoop]: 75 mSDtfsCounter, 213 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:24,925 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 357 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:47:24,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-03-19 04:47:25,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 795. [2022-03-19 04:47:25,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 599 states have (on average 1.1819699499165275) internal successors, (708), 606 states have internal predecessors, (708), 176 states have call successors, (176), 21 states have call predecessors, (176), 19 states have return successors, (174), 167 states have call predecessors, (174), 174 states have call successors, (174) [2022-03-19 04:47:25,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1058 transitions. [2022-03-19 04:47:25,118 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1058 transitions. Word has length 147 [2022-03-19 04:47:25,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:25,118 INFO L478 AbstractCegarLoop]: Abstraction has 795 states and 1058 transitions. [2022-03-19 04:47:25,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.578947368421052) internal successors, (106), 18 states have internal predecessors, (106), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-19 04:47:25,119 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1058 transitions. [2022-03-19 04:47:25,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-19 04:47:25,121 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:25,121 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:47:25,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-19 04:47:25,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:25,335 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:25,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:25,336 INFO L85 PathProgramCache]: Analyzing trace with hash -913503479, now seen corresponding path program 15 times [2022-03-19 04:47:25,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:25,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [6686123] [2022-03-19 04:47:25,336 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:25,336 INFO L85 PathProgramCache]: Analyzing trace with hash -913503479, now seen corresponding path program 16 times [2022-03-19 04:47:25,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:25,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641418962] [2022-03-19 04:47:25,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:25,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:25,343 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:25,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584150603] [2022-03-19 04:47:25,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:47:25,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:25,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:25,352 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:47:25,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-19 04:47:25,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:47:25,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:25,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 04:47:25,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 32 proven. 642 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:47:25,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 32 proven. 162 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-19 04:47:26,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:26,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641418962] [2022-03-19 04:47:26,435 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:26,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584150603] [2022-03-19 04:47:26,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584150603] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:26,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:26,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-03-19 04:47:26,435 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:26,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [6686123] [2022-03-19 04:47:26,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [6686123] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:26,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:26,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 04:47:26,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794653585] [2022-03-19 04:47:26,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:26,436 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 04:47:26,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:26,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 04:47:26,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 04:47:26,436 INFO L87 Difference]: Start difference. First operand 795 states and 1058 transitions. Second operand has 20 states, 20 states have (on average 5.4) internal successors, (108), 19 states have internal predecessors, (108), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-19 04:47:26,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:26,971 INFO L93 Difference]: Finished difference Result 846 states and 1128 transitions. [2022-03-19 04:47:26,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 04:47:26,971 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.4) internal successors, (108), 19 states have internal predecessors, (108), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 151 [2022-03-19 04:47:26,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:26,974 INFO L225 Difference]: With dead ends: 846 [2022-03-19 04:47:26,974 INFO L226 Difference]: Without dead ends: 841 [2022-03-19 04:47:26,974 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1080, Invalid=1470, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 04:47:26,976 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 307 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:26,976 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 352 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:47:26,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-03-19 04:47:27,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 819. [2022-03-19 04:47:27,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 609 states have (on average 1.1822660098522169) internal successors, (720), 626 states have internal predecessors, (720), 189 states have call successors, (189), 22 states have call predecessors, (189), 20 states have return successors, (187), 170 states have call predecessors, (187), 187 states have call successors, (187) [2022-03-19 04:47:27,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1096 transitions. [2022-03-19 04:47:27,117 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1096 transitions. Word has length 151 [2022-03-19 04:47:27,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:27,117 INFO L478 AbstractCegarLoop]: Abstraction has 819 states and 1096 transitions. [2022-03-19 04:47:27,117 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.4) internal successors, (108), 19 states have internal predecessors, (108), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-19 04:47:27,117 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1096 transitions. [2022-03-19 04:47:27,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-19 04:47:27,119 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:27,119 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 8, 8, 8, 8, 6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:47:27,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-19 04:47:27,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-19 04:47:27,335 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:27,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:27,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1031451968, now seen corresponding path program 27 times [2022-03-19 04:47:27,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:27,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1018290945] [2022-03-19 04:47:27,336 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:27,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1031451968, now seen corresponding path program 28 times [2022-03-19 04:47:27,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:27,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781521896] [2022-03-19 04:47:27,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:27,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:27,342 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:27,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1092223463] [2022-03-19 04:47:27,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:47:27,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:27,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:27,344 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:47:27,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-19 04:47:27,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:47:27,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:27,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 04:47:27,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:27,755 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 38 proven. 654 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:47:27,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:28,336 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 38 proven. 174 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-19 04:47:28,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:28,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781521896] [2022-03-19 04:47:28,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:28,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092223463] [2022-03-19 04:47:28,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092223463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:28,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:28,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-03-19 04:47:28,337 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:28,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1018290945] [2022-03-19 04:47:28,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1018290945] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:28,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:28,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 04:47:28,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167269211] [2022-03-19 04:47:28,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:28,338 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 04:47:28,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:28,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 04:47:28,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 04:47:28,338 INFO L87 Difference]: Start difference. First operand 819 states and 1096 transitions. Second operand has 20 states, 20 states have (on average 5.5) internal successors, (110), 19 states have internal predecessors, (110), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-19 04:47:29,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:29,011 INFO L93 Difference]: Finished difference Result 1023 states and 1398 transitions. [2022-03-19 04:47:29,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 04:47:29,012 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.5) internal successors, (110), 19 states have internal predecessors, (110), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 153 [2022-03-19 04:47:29,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:29,015 INFO L225 Difference]: With dead ends: 1023 [2022-03-19 04:47:29,016 INFO L226 Difference]: Without dead ends: 845 [2022-03-19 04:47:29,017 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1125, Invalid=1527, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 04:47:29,017 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 271 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:29,017 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 349 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:47:29,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-03-19 04:47:29,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 834. [2022-03-19 04:47:29,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 624 states have (on average 1.1826923076923077) internal successors, (738), 636 states have internal predecessors, (738), 189 states have call successors, (189), 22 states have call predecessors, (189), 20 states have return successors, (187), 175 states have call predecessors, (187), 187 states have call successors, (187) [2022-03-19 04:47:29,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1114 transitions. [2022-03-19 04:47:29,239 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1114 transitions. Word has length 153 [2022-03-19 04:47:29,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:29,240 INFO L478 AbstractCegarLoop]: Abstraction has 834 states and 1114 transitions. [2022-03-19 04:47:29,240 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.5) internal successors, (110), 19 states have internal predecessors, (110), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-19 04:47:29,240 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1114 transitions. [2022-03-19 04:47:29,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-19 04:47:29,242 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:29,242 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 10, 9, 9, 9, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:47:29,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-19 04:47:29,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:29,463 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:29,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:29,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1196851319, now seen corresponding path program 23 times [2022-03-19 04:47:29,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:29,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [246746562] [2022-03-19 04:47:29,464 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:29,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1196851319, now seen corresponding path program 24 times [2022-03-19 04:47:29,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:29,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012685646] [2022-03-19 04:47:29,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:29,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:29,470 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:29,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202770483] [2022-03-19 04:47:29,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:47:29,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:29,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:29,474 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:47:29,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-19 04:47:29,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 04:47:29,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:29,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 04:47:29,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:30,140 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 46 proven. 678 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:47:30,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:30,729 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 46 proven. 198 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-19 04:47:30,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:30,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012685646] [2022-03-19 04:47:30,729 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:30,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202770483] [2022-03-19 04:47:30,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202770483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:30,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:30,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-03-19 04:47:30,730 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:30,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [246746562] [2022-03-19 04:47:30,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [246746562] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:30,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:30,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 04:47:30,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012490022] [2022-03-19 04:47:30,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:30,731 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 04:47:30,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:30,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 04:47:30,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 04:47:30,731 INFO L87 Difference]: Start difference. First operand 834 states and 1114 transitions. Second operand has 20 states, 20 states have (on average 5.6) internal successors, (112), 19 states have internal predecessors, (112), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-19 04:47:31,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:31,381 INFO L93 Difference]: Finished difference Result 1021 states and 1392 transitions. [2022-03-19 04:47:31,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 04:47:31,381 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.6) internal successors, (112), 19 states have internal predecessors, (112), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 155 [2022-03-19 04:47:31,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:31,385 INFO L225 Difference]: With dead ends: 1021 [2022-03-19 04:47:31,385 INFO L226 Difference]: Without dead ends: 851 [2022-03-19 04:47:31,386 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1175, Invalid=1581, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 04:47:31,386 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 249 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:31,386 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 353 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:47:31,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-03-19 04:47:31,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 851. [2022-03-19 04:47:31,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 641 states have (on average 1.1778471138845554) internal successors, (755), 648 states have internal predecessors, (755), 189 states have call successors, (189), 22 states have call predecessors, (189), 20 states have return successors, (187), 180 states have call predecessors, (187), 187 states have call successors, (187) [2022-03-19 04:47:31,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1131 transitions. [2022-03-19 04:47:31,620 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1131 transitions. Word has length 155 [2022-03-19 04:47:31,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:31,620 INFO L478 AbstractCegarLoop]: Abstraction has 851 states and 1131 transitions. [2022-03-19 04:47:31,620 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.6) internal successors, (112), 19 states have internal predecessors, (112), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-19 04:47:31,621 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1131 transitions. [2022-03-19 04:47:31,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-19 04:47:31,623 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:31,623 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 8, 8, 8, 8, 6, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:47:31,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-19 04:47:31,826 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:31,827 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:31,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:31,832 INFO L85 PathProgramCache]: Analyzing trace with hash -61113684, now seen corresponding path program 17 times [2022-03-19 04:47:31,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:31,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1942027811] [2022-03-19 04:47:31,832 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:31,833 INFO L85 PathProgramCache]: Analyzing trace with hash -61113684, now seen corresponding path program 18 times [2022-03-19 04:47:31,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:31,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997911615] [2022-03-19 04:47:31,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:31,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:31,837 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:31,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373437612] [2022-03-19 04:47:31,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:47:31,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:31,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:31,840 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:47:31,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-19 04:47:32,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 04:47:32,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:32,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 04:47:32,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 34 proven. 734 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:47:32,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 34 proven. 190 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2022-03-19 04:47:33,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:33,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997911615] [2022-03-19 04:47:33,239 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:33,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373437612] [2022-03-19 04:47:33,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373437612] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:33,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:33,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2022-03-19 04:47:33,239 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:33,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1942027811] [2022-03-19 04:47:33,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1942027811] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:33,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:33,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 04:47:33,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29062128] [2022-03-19 04:47:33,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:33,240 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 04:47:33,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:33,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 04:47:33,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 04:47:33,241 INFO L87 Difference]: Start difference. First operand 851 states and 1131 transitions. Second operand has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 20 states have internal predecessors, (114), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-19 04:47:33,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:33,818 INFO L93 Difference]: Finished difference Result 902 states and 1201 transitions. [2022-03-19 04:47:33,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 04:47:33,818 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 20 states have internal predecessors, (114), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 159 [2022-03-19 04:47:33,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:33,837 INFO L225 Difference]: With dead ends: 902 [2022-03-19 04:47:33,837 INFO L226 Difference]: Without dead ends: 897 [2022-03-19 04:47:33,837 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1215, Invalid=1647, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 04:47:33,838 INFO L912 BasicCegarLoop]: 81 mSDtfsCounter, 227 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:33,838 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 417 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:47:33,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-03-19 04:47:34,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 875. [2022-03-19 04:47:34,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 651 states have (on average 1.1781874039938556) internal successors, (767), 668 states have internal predecessors, (767), 202 states have call successors, (202), 23 states have call predecessors, (202), 21 states have return successors, (200), 183 states have call predecessors, (200), 200 states have call successors, (200) [2022-03-19 04:47:34,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1169 transitions. [2022-03-19 04:47:34,097 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1169 transitions. Word has length 159 [2022-03-19 04:47:34,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:34,097 INFO L478 AbstractCegarLoop]: Abstraction has 875 states and 1169 transitions. [2022-03-19 04:47:34,097 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 20 states have internal predecessors, (114), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-19 04:47:34,097 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1169 transitions. [2022-03-19 04:47:34,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-19 04:47:34,100 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:34,100 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 9, 9, 9, 9, 6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:47:34,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-19 04:47:34,306 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:34,306 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:34,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:34,306 INFO L85 PathProgramCache]: Analyzing trace with hash -160708573, now seen corresponding path program 29 times [2022-03-19 04:47:34,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:34,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2015332284] [2022-03-19 04:47:34,307 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:34,307 INFO L85 PathProgramCache]: Analyzing trace with hash -160708573, now seen corresponding path program 30 times [2022-03-19 04:47:34,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:34,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708975685] [2022-03-19 04:47:34,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:34,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:34,311 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:34,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027825012] [2022-03-19 04:47:34,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:47:34,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:34,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:34,316 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:47:34,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-19 04:47:35,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 04:47:35,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:35,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 04:47:35,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 40 proven. 750 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:47:35,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:36,390 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 40 proven. 206 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2022-03-19 04:47:36,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:36,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708975685] [2022-03-19 04:47:36,391 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:36,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027825012] [2022-03-19 04:47:36,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027825012] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:36,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:36,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2022-03-19 04:47:36,391 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:36,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2015332284] [2022-03-19 04:47:36,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2015332284] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:36,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:36,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 04:47:36,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770798825] [2022-03-19 04:47:36,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:36,393 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 04:47:36,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:36,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 04:47:36,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 04:47:36,397 INFO L87 Difference]: Start difference. First operand 875 states and 1169 transitions. Second operand has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 20 states have internal predecessors, (116), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-19 04:47:37,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:37,531 INFO L93 Difference]: Finished difference Result 1079 states and 1471 transitions. [2022-03-19 04:47:37,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 04:47:37,532 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 20 states have internal predecessors, (116), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 161 [2022-03-19 04:47:37,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:37,536 INFO L225 Difference]: With dead ends: 1079 [2022-03-19 04:47:37,536 INFO L226 Difference]: Without dead ends: 901 [2022-03-19 04:47:37,537 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1263, Invalid=1707, Unknown=0, NotChecked=0, Total=2970 [2022-03-19 04:47:37,537 INFO L912 BasicCegarLoop]: 81 mSDtfsCounter, 297 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:37,538 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 377 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 04:47:37,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2022-03-19 04:47:37,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 890. [2022-03-19 04:47:37,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 666 states have (on average 1.1786786786786787) internal successors, (785), 678 states have internal predecessors, (785), 202 states have call successors, (202), 23 states have call predecessors, (202), 21 states have return successors, (200), 188 states have call predecessors, (200), 200 states have call successors, (200) [2022-03-19 04:47:37,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1187 transitions. [2022-03-19 04:47:37,808 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1187 transitions. Word has length 161 [2022-03-19 04:47:37,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:37,809 INFO L478 AbstractCegarLoop]: Abstraction has 890 states and 1187 transitions. [2022-03-19 04:47:37,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 20 states have internal predecessors, (116), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-19 04:47:37,809 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1187 transitions. [2022-03-19 04:47:37,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-19 04:47:37,810 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:37,811 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 8, 7, 7, 7, 7, 6, 6, 6, 5, 4, 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] [2022-03-19 04:47:37,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-19 04:47:38,017 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:38,017 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:38,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:38,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1942329766, now seen corresponding path program 25 times [2022-03-19 04:47:38,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:38,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [762715908] [2022-03-19 04:47:38,018 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:38,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1942329766, now seen corresponding path program 26 times [2022-03-19 04:47:38,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:38,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275180443] [2022-03-19 04:47:38,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:38,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:38,026 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:38,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103897683] [2022-03-19 04:47:38,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:47:38,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:38,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:38,039 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:47:38,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-19 04:47:38,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:47:38,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:38,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 04:47:38,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 54 proven. 726 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:47:38,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 54 proven. 182 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2022-03-19 04:47:39,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:39,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275180443] [2022-03-19 04:47:39,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:39,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103897683] [2022-03-19 04:47:39,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103897683] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:39,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:39,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2022-03-19 04:47:39,431 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:39,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [762715908] [2022-03-19 04:47:39,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [762715908] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:39,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:39,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 04:47:39,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644938291] [2022-03-19 04:47:39,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:39,432 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 04:47:39,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:39,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 04:47:39,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 04:47:39,433 INFO L87 Difference]: Start difference. First operand 890 states and 1187 transitions. Second operand has 21 states, 21 states have (on average 5.619047619047619) internal successors, (118), 20 states have internal predecessors, (118), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-19 04:47:40,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:40,105 INFO L93 Difference]: Finished difference Result 1077 states and 1465 transitions. [2022-03-19 04:47:40,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-19 04:47:40,106 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.619047619047619) internal successors, (118), 20 states have internal predecessors, (118), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 163 [2022-03-19 04:47:40,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:40,109 INFO L225 Difference]: With dead ends: 1077 [2022-03-19 04:47:40,109 INFO L226 Difference]: Without dead ends: 907 [2022-03-19 04:47:40,109 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1316, Invalid=1764, Unknown=0, NotChecked=0, Total=3080 [2022-03-19 04:47:40,110 INFO L912 BasicCegarLoop]: 81 mSDtfsCounter, 275 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:40,110 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 392 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:47:40,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-03-19 04:47:40,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 907. [2022-03-19 04:47:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 683 states have (on average 1.1742313323572475) internal successors, (802), 690 states have internal predecessors, (802), 202 states have call successors, (202), 23 states have call predecessors, (202), 21 states have return successors, (200), 193 states have call predecessors, (200), 200 states have call successors, (200) [2022-03-19 04:47:40,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1204 transitions. [2022-03-19 04:47:40,333 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1204 transitions. Word has length 163 [2022-03-19 04:47:40,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:40,333 INFO L478 AbstractCegarLoop]: Abstraction has 907 states and 1204 transitions. [2022-03-19 04:47:40,333 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.619047619047619) internal successors, (118), 20 states have internal predecessors, (118), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-19 04:47:40,333 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1204 transitions. [2022-03-19 04:47:40,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-19 04:47:40,346 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:40,346 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 9, 9, 9, 9, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:47:40,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-19 04:47:40,569 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-19 04:47:40,570 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:40,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:40,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1797417137, now seen corresponding path program 19 times [2022-03-19 04:47:40,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:40,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1110947652] [2022-03-19 04:47:40,571 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:40,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1797417137, now seen corresponding path program 20 times [2022-03-19 04:47:40,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:40,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465683241] [2022-03-19 04:47:40,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:40,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:40,577 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:40,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540850391] [2022-03-19 04:47:40,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:47:40,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:40,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:40,579 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:47:40,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-19 04:47:40,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:47:40,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:40,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 04:47:40,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:41,130 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 36 proven. 834 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:47:41,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 36 proven. 222 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-03-19 04:47:41,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:41,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465683241] [2022-03-19 04:47:41,682 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:41,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540850391] [2022-03-19 04:47:41,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540850391] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:41,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:41,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-03-19 04:47:41,682 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:41,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1110947652] [2022-03-19 04:47:41,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1110947652] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:41,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:41,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 04:47:41,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199698186] [2022-03-19 04:47:41,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:41,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 04:47:41,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:41,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 04:47:41,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 04:47:41,684 INFO L87 Difference]: Start difference. First operand 907 states and 1204 transitions. Second operand has 22 states, 22 states have (on average 5.454545454545454) internal successors, (120), 21 states have internal predecessors, (120), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-19 04:47:42,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:42,324 INFO L93 Difference]: Finished difference Result 958 states and 1274 transitions. [2022-03-19 04:47:42,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-19 04:47:42,324 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.454545454545454) internal successors, (120), 21 states have internal predecessors, (120), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 167 [2022-03-19 04:47:42,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:42,333 INFO L225 Difference]: With dead ends: 958 [2022-03-19 04:47:42,333 INFO L226 Difference]: Without dead ends: 953 [2022-03-19 04:47:42,333 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1358, Invalid=1834, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 04:47:42,334 INFO L912 BasicCegarLoop]: 84 mSDtfsCounter, 291 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:42,334 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 395 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:47:42,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-03-19 04:47:42,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 931. [2022-03-19 04:47:42,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 693 states have (on average 1.1746031746031746) internal successors, (814), 710 states have internal predecessors, (814), 215 states have call successors, (215), 24 states have call predecessors, (215), 22 states have return successors, (213), 196 states have call predecessors, (213), 213 states have call successors, (213) [2022-03-19 04:47:42,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1242 transitions. [2022-03-19 04:47:42,493 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1242 transitions. Word has length 167 [2022-03-19 04:47:42,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:42,494 INFO L478 AbstractCegarLoop]: Abstraction has 931 states and 1242 transitions. [2022-03-19 04:47:42,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.454545454545454) internal successors, (120), 21 states have internal predecessors, (120), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-19 04:47:42,494 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1242 transitions. [2022-03-19 04:47:42,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-03-19 04:47:42,496 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:42,496 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 10, 10, 10, 10, 7, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:47:42,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-19 04:47:42,712 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-19 04:47:42,712 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:42,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:42,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1993951238, now seen corresponding path program 31 times [2022-03-19 04:47:42,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:42,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [870343687] [2022-03-19 04:47:42,713 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:42,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1993951238, now seen corresponding path program 32 times [2022-03-19 04:47:42,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:42,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548734384] [2022-03-19 04:47:42,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:42,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:42,717 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:42,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241681160] [2022-03-19 04:47:42,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:47:42,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:42,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:42,719 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:47:42,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-19 04:47:42,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:47:42,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:42,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 04:47:42,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 42 proven. 854 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:47:43,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 42 proven. 242 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-03-19 04:47:43,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:43,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548734384] [2022-03-19 04:47:43,943 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:43,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241681160] [2022-03-19 04:47:43,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241681160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:43,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:43,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-03-19 04:47:43,943 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:43,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [870343687] [2022-03-19 04:47:43,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [870343687] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:43,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:43,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 04:47:43,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758563942] [2022-03-19 04:47:43,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:43,944 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 04:47:43,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:43,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 04:47:43,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 04:47:43,945 INFO L87 Difference]: Start difference. First operand 931 states and 1242 transitions. Second operand has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 21 states have internal predecessors, (122), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-19 04:47:44,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:44,552 INFO L93 Difference]: Finished difference Result 1135 states and 1544 transitions. [2022-03-19 04:47:44,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 04:47:44,552 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 21 states have internal predecessors, (122), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 169 [2022-03-19 04:47:44,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:44,556 INFO L225 Difference]: With dead ends: 1135 [2022-03-19 04:47:44,556 INFO L226 Difference]: Without dead ends: 957 [2022-03-19 04:47:44,557 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1409, Invalid=1897, Unknown=0, NotChecked=0, Total=3306 [2022-03-19 04:47:44,557 INFO L912 BasicCegarLoop]: 84 mSDtfsCounter, 335 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:44,558 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 391 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:47:44,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-03-19 04:47:44,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 946. [2022-03-19 04:47:44,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 708 states have (on average 1.1751412429378532) internal successors, (832), 720 states have internal predecessors, (832), 215 states have call successors, (215), 24 states have call predecessors, (215), 22 states have return successors, (213), 201 states have call predecessors, (213), 213 states have call successors, (213) [2022-03-19 04:47:44,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1260 transitions. [2022-03-19 04:47:44,778 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1260 transitions. Word has length 169 [2022-03-19 04:47:44,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:44,779 INFO L478 AbstractCegarLoop]: Abstraction has 946 states and 1260 transitions. [2022-03-19 04:47:44,779 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 21 states have internal predecessors, (122), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-19 04:47:44,779 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1260 transitions. [2022-03-19 04:47:44,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-03-19 04:47:44,781 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:44,781 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 9, 8, 8, 8, 7, 6, 6, 6, 5, 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] [2022-03-19 04:47:44,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-19 04:47:44,994 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-19 04:47:44,994 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:44,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:44,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1121656631, now seen corresponding path program 27 times [2022-03-19 04:47:44,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:44,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [664111836] [2022-03-19 04:47:44,995 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:44,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1121656631, now seen corresponding path program 28 times [2022-03-19 04:47:44,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:44,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265406015] [2022-03-19 04:47:44,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:44,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:45,000 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:45,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015590581] [2022-03-19 04:47:45,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:47:45,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:45,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:45,001 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:47:45,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-19 04:47:45,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:47:45,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:45,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 04:47:45,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 56 proven. 824 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:47:45,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 56 proven. 212 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-03-19 04:47:46,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:46,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265406015] [2022-03-19 04:47:46,232 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:46,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015590581] [2022-03-19 04:47:46,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015590581] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:46,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:46,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-03-19 04:47:46,232 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:46,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [664111836] [2022-03-19 04:47:46,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [664111836] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:46,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:46,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 04:47:46,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228832923] [2022-03-19 04:47:46,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:46,233 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 04:47:46,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:46,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 04:47:46,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 04:47:46,233 INFO L87 Difference]: Start difference. First operand 946 states and 1260 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 21 states have internal predecessors, (124), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-19 04:47:46,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:46,945 INFO L93 Difference]: Finished difference Result 1133 states and 1538 transitions. [2022-03-19 04:47:46,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 04:47:46,946 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 21 states have internal predecessors, (124), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 171 [2022-03-19 04:47:46,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:46,949 INFO L225 Difference]: With dead ends: 1133 [2022-03-19 04:47:46,949 INFO L226 Difference]: Without dead ends: 963 [2022-03-19 04:47:46,971 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1465, Invalid=1957, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 04:47:46,972 INFO L912 BasicCegarLoop]: 84 mSDtfsCounter, 332 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:46,972 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 405 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:47:46,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-03-19 04:47:47,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2022-03-19 04:47:47,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 725 states have (on average 1.1710344827586208) internal successors, (849), 732 states have internal predecessors, (849), 215 states have call successors, (215), 24 states have call predecessors, (215), 22 states have return successors, (213), 206 states have call predecessors, (213), 213 states have call successors, (213) [2022-03-19 04:47:47,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1277 transitions. [2022-03-19 04:47:47,161 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1277 transitions. Word has length 171 [2022-03-19 04:47:47,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:47,161 INFO L478 AbstractCegarLoop]: Abstraction has 963 states and 1277 transitions. [2022-03-19 04:47:47,161 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 21 states have internal predecessors, (124), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-19 04:47:47,162 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1277 transitions. [2022-03-19 04:47:47,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-19 04:47:47,163 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:47,163 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 10, 10, 10, 10, 7, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:47:47,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-19 04:47:47,364 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:47,365 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:47,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:47,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1863737586, now seen corresponding path program 21 times [2022-03-19 04:47:47,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:47,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1187173362] [2022-03-19 04:47:47,366 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:47,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1863737586, now seen corresponding path program 22 times [2022-03-19 04:47:47,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:47,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266015260] [2022-03-19 04:47:47,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:47,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:47,372 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:47,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1495048000] [2022-03-19 04:47:47,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:47:47,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:47,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:47,374 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:47:47,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-19 04:47:47,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:47:47,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:47,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 04:47:47,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 38 proven. 942 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:47:47,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 38 proven. 258 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-03-19 04:47:48,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:48,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266015260] [2022-03-19 04:47:48,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:48,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495048000] [2022-03-19 04:47:48,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495048000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:48,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:48,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-03-19 04:47:48,550 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:48,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1187173362] [2022-03-19 04:47:48,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1187173362] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:48,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:48,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 04:47:48,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421463694] [2022-03-19 04:47:48,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:48,551 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 04:47:48,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:48,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 04:47:48,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 04:47:48,552 INFO L87 Difference]: Start difference. First operand 963 states and 1277 transitions. Second operand has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 22 states have internal predecessors, (126), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-19 04:47:49,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:49,280 INFO L93 Difference]: Finished difference Result 1014 states and 1347 transitions. [2022-03-19 04:47:49,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 04:47:49,281 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 22 states have internal predecessors, (126), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 175 [2022-03-19 04:47:49,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:49,288 INFO L225 Difference]: With dead ends: 1014 [2022-03-19 04:47:49,289 INFO L226 Difference]: Without dead ends: 1009 [2022-03-19 04:47:49,290 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1509, Invalid=2031, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 04:47:49,290 INFO L912 BasicCegarLoop]: 87 mSDtfsCounter, 360 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:49,290 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 411 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:47:49,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-03-19 04:47:49,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 987. [2022-03-19 04:47:49,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 735 states have (on average 1.1714285714285715) internal successors, (861), 752 states have internal predecessors, (861), 228 states have call successors, (228), 25 states have call predecessors, (228), 23 states have return successors, (226), 209 states have call predecessors, (226), 226 states have call successors, (226) [2022-03-19 04:47:49,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 1315 transitions. [2022-03-19 04:47:49,567 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 1315 transitions. Word has length 175 [2022-03-19 04:47:49,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:49,568 INFO L478 AbstractCegarLoop]: Abstraction has 987 states and 1315 transitions. [2022-03-19 04:47:49,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 22 states have internal predecessors, (126), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-19 04:47:49,568 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 1315 transitions. [2022-03-19 04:47:49,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-19 04:47:49,571 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:49,571 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 9, 9, 9, 9, 7, 6, 6, 6, 5, 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] [2022-03-19 04:47:49,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-19 04:47:49,794 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:49,795 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:49,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:49,795 INFO L85 PathProgramCache]: Analyzing trace with hash -743527641, now seen corresponding path program 33 times [2022-03-19 04:47:49,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:49,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1909679289] [2022-03-19 04:47:49,796 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:49,796 INFO L85 PathProgramCache]: Analyzing trace with hash -743527641, now seen corresponding path program 34 times [2022-03-19 04:47:49,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:49,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029942482] [2022-03-19 04:47:49,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:49,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:49,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:49,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713373974] [2022-03-19 04:47:49,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:47:49,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:49,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:49,804 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:47:49,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-19 04:47:49,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:47:49,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:49,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 04:47:49,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 974 backedges. 46 proven. 924 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:47:50,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 974 backedges. 46 proven. 240 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-03-19 04:47:50,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:50,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029942482] [2022-03-19 04:47:50,732 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:50,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713373974] [2022-03-19 04:47:50,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713373974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:50,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:50,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-03-19 04:47:50,733 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:50,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1909679289] [2022-03-19 04:47:50,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1909679289] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:50,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:50,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 04:47:50,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534533167] [2022-03-19 04:47:50,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:50,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 04:47:50,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:50,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 04:47:50,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 04:47:50,735 INFO L87 Difference]: Start difference. First operand 987 states and 1315 transitions. Second operand has 23 states, 23 states have (on average 5.565217391304348) internal successors, (128), 22 states have internal predecessors, (128), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-19 04:47:51,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:51,405 INFO L93 Difference]: Finished difference Result 1191 states and 1617 transitions. [2022-03-19 04:47:51,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 04:47:51,405 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.565217391304348) internal successors, (128), 22 states have internal predecessors, (128), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 177 [2022-03-19 04:47:51,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:51,409 INFO L225 Difference]: With dead ends: 1191 [2022-03-19 04:47:51,409 INFO L226 Difference]: Without dead ends: 1013 [2022-03-19 04:47:51,410 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1563, Invalid=2097, Unknown=0, NotChecked=0, Total=3660 [2022-03-19 04:47:51,411 INFO L912 BasicCegarLoop]: 87 mSDtfsCounter, 361 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:51,411 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 380 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:47:51,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-03-19 04:47:51,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1002. [2022-03-19 04:47:51,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 750 states have (on average 1.172) internal successors, (879), 762 states have internal predecessors, (879), 228 states have call successors, (228), 25 states have call predecessors, (228), 23 states have return successors, (226), 214 states have call predecessors, (226), 226 states have call successors, (226) [2022-03-19 04:47:51,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1333 transitions. [2022-03-19 04:47:51,699 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1333 transitions. Word has length 177 [2022-03-19 04:47:51,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:51,699 INFO L478 AbstractCegarLoop]: Abstraction has 1002 states and 1333 transitions. [2022-03-19 04:47:51,699 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.565217391304348) internal successors, (128), 22 states have internal predecessors, (128), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-19 04:47:51,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1333 transitions. [2022-03-19 04:47:51,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-03-19 04:47:51,702 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:51,702 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 10, 9, 9, 9, 7, 6, 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] [2022-03-19 04:47:51,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-19 04:47:51,905 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:51,905 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:51,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:51,906 INFO L85 PathProgramCache]: Analyzing trace with hash 2007520492, now seen corresponding path program 29 times [2022-03-19 04:47:51,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:51,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [494595847] [2022-03-19 04:47:51,906 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:51,906 INFO L85 PathProgramCache]: Analyzing trace with hash 2007520492, now seen corresponding path program 30 times [2022-03-19 04:47:51,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:51,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819214893] [2022-03-19 04:47:51,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:51,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:51,928 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:51,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [932470567] [2022-03-19 04:47:51,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:47:51,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:51,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:51,930 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:47:51,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-19 04:47:53,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-19 04:47:53,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:53,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 04:47:53,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 58 proven. 930 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:47:54,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:55,332 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 58 proven. 246 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-03-19 04:47:55,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:55,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819214893] [2022-03-19 04:47:55,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:55,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932470567] [2022-03-19 04:47:55,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932470567] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:55,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:55,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-03-19 04:47:55,333 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:55,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [494595847] [2022-03-19 04:47:55,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [494595847] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:55,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:55,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 04:47:55,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705035891] [2022-03-19 04:47:55,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:55,334 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 04:47:55,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:55,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 04:47:55,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 04:47:55,334 INFO L87 Difference]: Start difference. First operand 1002 states and 1333 transitions. Second operand has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 22 states have internal predecessors, (130), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-19 04:47:56,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:47:56,025 INFO L93 Difference]: Finished difference Result 1189 states and 1611 transitions. [2022-03-19 04:47:56,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-19 04:47:56,025 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 22 states have internal predecessors, (130), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 179 [2022-03-19 04:47:56,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:47:56,028 INFO L225 Difference]: With dead ends: 1189 [2022-03-19 04:47:56,028 INFO L226 Difference]: Without dead ends: 1019 [2022-03-19 04:47:56,029 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1622, Invalid=2160, Unknown=0, NotChecked=0, Total=3782 [2022-03-19 04:47:56,029 INFO L912 BasicCegarLoop]: 87 mSDtfsCounter, 378 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:47:56,029 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 396 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:47:56,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2022-03-19 04:47:56,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 1019. [2022-03-19 04:47:56,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 767 states have (on average 1.1681877444589308) internal successors, (896), 774 states have internal predecessors, (896), 228 states have call successors, (228), 25 states have call predecessors, (228), 23 states have return successors, (226), 219 states have call predecessors, (226), 226 states have call successors, (226) [2022-03-19 04:47:56,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1350 transitions. [2022-03-19 04:47:56,239 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1350 transitions. Word has length 179 [2022-03-19 04:47:56,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:47:56,239 INFO L478 AbstractCegarLoop]: Abstraction has 1019 states and 1350 transitions. [2022-03-19 04:47:56,239 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 22 states have internal predecessors, (130), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-19 04:47:56,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1350 transitions. [2022-03-19 04:47:56,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-19 04:47:56,241 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:47:56,242 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 11, 11, 11, 8, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:47:56,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-19 04:47:56,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-03-19 04:47:56,448 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:47:56,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:47:56,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1274488939, now seen corresponding path program 23 times [2022-03-19 04:47:56,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:56,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [914886925] [2022-03-19 04:47:56,448 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:47:56,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1274488939, now seen corresponding path program 24 times [2022-03-19 04:47:56,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:47:56,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407253873] [2022-03-19 04:47:56,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:47:56,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:47:56,454 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:47:56,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293524756] [2022-03-19 04:47:56,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:47:56,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:47:56,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:47:56,456 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:47:56,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-19 04:47:58,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-19 04:47:58,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:47:58,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-19 04:47:58,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:47:58,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 40 proven. 1058 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:47:58,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:47:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 40 proven. 298 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-03-19 04:47:59,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:47:59,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407253873] [2022-03-19 04:47:59,458 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:47:59,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293524756] [2022-03-19 04:47:59,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293524756] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:47:59,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:47:59,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-03-19 04:47:59,458 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:47:59,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [914886925] [2022-03-19 04:47:59,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [914886925] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:47:59,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:47:59,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 04:47:59,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177502910] [2022-03-19 04:47:59,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:47:59,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 04:47:59,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:47:59,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 04:47:59,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 04:47:59,460 INFO L87 Difference]: Start difference. First operand 1019 states and 1350 transitions. Second operand has 24 states, 24 states have (on average 5.5) internal successors, (132), 23 states have internal predecessors, (132), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-19 04:48:00,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:48:00,109 INFO L93 Difference]: Finished difference Result 1070 states and 1420 transitions. [2022-03-19 04:48:00,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-19 04:48:00,110 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.5) internal successors, (132), 23 states have internal predecessors, (132), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) Word has length 183 [2022-03-19 04:48:00,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:48:00,112 INFO L225 Difference]: With dead ends: 1070 [2022-03-19 04:48:00,112 INFO L226 Difference]: Without dead ends: 1065 [2022-03-19 04:48:00,113 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1668, Invalid=2238, Unknown=0, NotChecked=0, Total=3906 [2022-03-19 04:48:00,113 INFO L912 BasicCegarLoop]: 90 mSDtfsCounter, 345 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:48:00,113 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 433 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:48:00,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2022-03-19 04:48:00,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1043. [2022-03-19 04:48:00,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 777 states have (on average 1.1685971685971686) internal successors, (908), 794 states have internal predecessors, (908), 241 states have call successors, (241), 26 states have call predecessors, (241), 24 states have return successors, (239), 222 states have call predecessors, (239), 239 states have call successors, (239) [2022-03-19 04:48:00,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1388 transitions. [2022-03-19 04:48:00,364 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1388 transitions. Word has length 183 [2022-03-19 04:48:00,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:48:00,365 INFO L478 AbstractCegarLoop]: Abstraction has 1043 states and 1388 transitions. [2022-03-19 04:48:00,365 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.5) internal successors, (132), 23 states have internal predecessors, (132), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-19 04:48:00,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1388 transitions. [2022-03-19 04:48:00,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-19 04:48:00,368 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:48:00,368 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 9, 9, 9, 9, 8, 7, 7, 7, 5, 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] [2022-03-19 04:48:00,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-19 04:48:00,573 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:48:00,573 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:48:00,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:48:00,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1136152360, now seen corresponding path program 35 times [2022-03-19 04:48:00,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:00,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1499407084] [2022-03-19 04:48:00,574 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:48:00,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1136152360, now seen corresponding path program 36 times [2022-03-19 04:48:00,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:48:00,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243721291] [2022-03-19 04:48:00,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:48:00,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:48:00,580 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:48:00,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965649728] [2022-03-19 04:48:00,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:48:00,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:48:00,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:48:00,582 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:48:00,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-19 04:48:01,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-19 04:48:01,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:48:01,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-19 04:48:01,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:48:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 48 proven. 1026 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:48:02,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:48:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 48 proven. 266 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-03-19 04:48:03,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:48:03,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243721291] [2022-03-19 04:48:03,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:48:03,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965649728] [2022-03-19 04:48:03,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965649728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:48:03,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:48:03,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-03-19 04:48:03,084 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:48:03,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1499407084] [2022-03-19 04:48:03,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1499407084] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:48:03,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:48:03,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 04:48:03,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733582530] [2022-03-19 04:48:03,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:48:03,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 04:48:03,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:03,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 04:48:03,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 04:48:03,086 INFO L87 Difference]: Start difference. First operand 1043 states and 1388 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 23 states have internal predecessors, (134), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-19 04:48:03,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:48:03,883 INFO L93 Difference]: Finished difference Result 1247 states and 1690 transitions. [2022-03-19 04:48:03,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-19 04:48:03,883 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 23 states have internal predecessors, (134), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) Word has length 185 [2022-03-19 04:48:03,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:48:03,886 INFO L225 Difference]: With dead ends: 1247 [2022-03-19 04:48:03,886 INFO L226 Difference]: Without dead ends: 1069 [2022-03-19 04:48:03,887 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1725, Invalid=2307, Unknown=0, NotChecked=0, Total=4032 [2022-03-19 04:48:03,887 INFO L912 BasicCegarLoop]: 90 mSDtfsCounter, 390 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 04:48:03,888 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 426 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 04:48:03,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2022-03-19 04:48:04,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1058. [2022-03-19 04:48:04,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 792 states have (on average 1.1691919191919191) internal successors, (926), 804 states have internal predecessors, (926), 241 states have call successors, (241), 26 states have call predecessors, (241), 24 states have return successors, (239), 227 states have call predecessors, (239), 239 states have call successors, (239) [2022-03-19 04:48:04,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1406 transitions. [2022-03-19 04:48:04,200 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1406 transitions. Word has length 185 [2022-03-19 04:48:04,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:48:04,201 INFO L478 AbstractCegarLoop]: Abstraction has 1058 states and 1406 transitions. [2022-03-19 04:48:04,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 23 states have internal predecessors, (134), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-19 04:48:04,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1406 transitions. [2022-03-19 04:48:04,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-19 04:48:04,203 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:48:04,214 INFO L500 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] [2022-03-19 04:48:04,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-19 04:48:04,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-19 04:48:04,420 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:48:04,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:48:04,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1188230671, now seen corresponding path program 31 times [2022-03-19 04:48:04,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:04,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1426012316] [2022-03-19 04:48:04,420 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:48:04,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1188230671, now seen corresponding path program 32 times [2022-03-19 04:48:04,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:48:04,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104173101] [2022-03-19 04:48:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:48:04,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:48:04,426 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:48:04,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658843712] [2022-03-19 04:48:04,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:48:04,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:48:04,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:48:04,428 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:48:04,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-19 04:48:04,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:48:04,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:48:04,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 04:48:04,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:48:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 80 proven. 252 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-03-19 04:48:04,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:48:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 80 proven. 252 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-03-19 04:48:05,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:48:05,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104173101] [2022-03-19 04:48:05,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:48:05,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658843712] [2022-03-19 04:48:05,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658843712] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:48:05,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:48:05,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-19 04:48:05,265 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:48:05,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1426012316] [2022-03-19 04:48:05,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1426012316] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:48:05,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:48:05,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 04:48:05,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014858706] [2022-03-19 04:48:05,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:48:05,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 04:48:05,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:05,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 04:48:05,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-03-19 04:48:05,266 INFO L87 Difference]: Start difference. First operand 1058 states and 1406 transitions. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 11 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2022-03-19 04:48:06,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:48:06,115 INFO L93 Difference]: Finished difference Result 1935 states and 2627 transitions. [2022-03-19 04:48:06,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 04:48:06,115 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 11 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) Word has length 187 [2022-03-19 04:48:06,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:48:06,119 INFO L225 Difference]: With dead ends: 1935 [2022-03-19 04:48:06,119 INFO L226 Difference]: Without dead ends: 1765 [2022-03-19 04:48:06,119 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-03-19 04:48:06,120 INFO L912 BasicCegarLoop]: 222 mSDtfsCounter, 108 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:48:06,120 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 1438 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:48:06,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2022-03-19 04:48:06,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1600. [2022-03-19 04:48:06,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1200 states have (on average 1.1766666666666667) internal successors, (1412), 1220 states have internal predecessors, (1412), 375 states have call successors, (375), 26 states have call predecessors, (375), 24 states have return successors, (373), 353 states have call predecessors, (373), 373 states have call successors, (373) [2022-03-19 04:48:06,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2160 transitions. [2022-03-19 04:48:06,540 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2160 transitions. Word has length 187 [2022-03-19 04:48:06,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:48:06,541 INFO L478 AbstractCegarLoop]: Abstraction has 1600 states and 2160 transitions. [2022-03-19 04:48:06,541 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 11 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2022-03-19 04:48:06,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2160 transitions. [2022-03-19 04:48:06,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-19 04:48:06,544 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:48:06,544 INFO L500 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] [2022-03-19 04:48:06,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-19 04:48:06,753 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-19 04:48:06,753 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:48:06,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:48:06,753 INFO L85 PathProgramCache]: Analyzing trace with hash 2070462991, now seen corresponding path program 33 times [2022-03-19 04:48:06,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:06,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2063862759] [2022-03-19 04:48:06,754 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:48:06,754 INFO L85 PathProgramCache]: Analyzing trace with hash 2070462991, now seen corresponding path program 34 times [2022-03-19 04:48:06,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:48:06,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892151070] [2022-03-19 04:48:06,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:48:06,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:48:06,760 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:48:06,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307029838] [2022-03-19 04:48:06,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:48:06,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:48:06,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:48:06,762 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:48:06,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-19 04:48:06,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:48:06,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:48:06,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-19 04:48:06,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:48:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 1044 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:48:07,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:48:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 284 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-03-19 04:48:08,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:48:08,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892151070] [2022-03-19 04:48:08,148 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:48:08,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307029838] [2022-03-19 04:48:08,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307029838] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:48:08,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:48:08,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-03-19 04:48:08,148 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:48:08,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2063862759] [2022-03-19 04:48:08,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2063862759] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:48:08,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:48:08,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 04:48:08,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827119099] [2022-03-19 04:48:08,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:48:08,149 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 04:48:08,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:08,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 04:48:08,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 04:48:08,150 INFO L87 Difference]: Start difference. First operand 1600 states and 2160 transitions. Second operand has 24 states, 24 states have (on average 5.666666666666667) internal successors, (136), 23 states have internal predecessors, (136), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-19 04:48:09,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:48:09,295 INFO L93 Difference]: Finished difference Result 1959 states and 2704 transitions. [2022-03-19 04:48:09,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-19 04:48:09,295 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.666666666666667) internal successors, (136), 23 states have internal predecessors, (136), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) Word has length 187 [2022-03-19 04:48:09,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:48:09,300 INFO L225 Difference]: With dead ends: 1959 [2022-03-19 04:48:09,300 INFO L226 Difference]: Without dead ends: 1635 [2022-03-19 04:48:09,301 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1787, Invalid=2373, Unknown=0, NotChecked=0, Total=4160 [2022-03-19 04:48:09,301 INFO L912 BasicCegarLoop]: 90 mSDtfsCounter, 472 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 04:48:09,301 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 415 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 04:48:09,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2022-03-19 04:48:09,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1635. [2022-03-19 04:48:09,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1235 states have (on average 1.17165991902834) internal successors, (1447), 1246 states have internal predecessors, (1447), 375 states have call successors, (375), 26 states have call predecessors, (375), 24 states have return successors, (373), 362 states have call predecessors, (373), 373 states have call successors, (373) [2022-03-19 04:48:09,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 2195 transitions. [2022-03-19 04:48:09,932 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 2195 transitions. Word has length 187 [2022-03-19 04:48:09,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:48:09,932 INFO L478 AbstractCegarLoop]: Abstraction has 1635 states and 2195 transitions. [2022-03-19 04:48:09,932 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.666666666666667) internal successors, (136), 23 states have internal predecessors, (136), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-19 04:48:09,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 2195 transitions. [2022-03-19 04:48:09,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-19 04:48:09,936 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:48:09,936 INFO L500 BasicCegarLoop]: trace histogram [22, 21, 21, 9, 9, 9, 9, 8, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:48:09,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-19 04:48:10,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-19 04:48:10,175 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:48:10,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:48:10,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1458791492, now seen corresponding path program 25 times [2022-03-19 04:48:10,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:10,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1617165533] [2022-03-19 04:48:10,176 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:48:10,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1458791492, now seen corresponding path program 26 times [2022-03-19 04:48:10,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:48:10,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605380280] [2022-03-19 04:48:10,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:48:10,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:48:10,181 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:48:10,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718929607] [2022-03-19 04:48:10,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:48:10,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:48:10,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:48:10,183 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:48:10,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-19 04:48:10,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:48:10,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:48:10,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 04:48:10,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:48:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 42 proven. 1128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:48:10,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:48:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 42 proven. 288 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-03-19 04:48:11,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:48:11,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605380280] [2022-03-19 04:48:11,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:48:11,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718929607] [2022-03-19 04:48:11,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718929607] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:48:11,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:48:11,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-03-19 04:48:11,545 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:48:11,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1617165533] [2022-03-19 04:48:11,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1617165533] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:48:11,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:48:11,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 04:48:11,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646290253] [2022-03-19 04:48:11,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:48:11,545 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 04:48:11,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:11,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 04:48:11,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 04:48:11,546 INFO L87 Difference]: Start difference. First operand 1635 states and 2195 transitions. Second operand has 25 states, 25 states have (on average 5.52) internal successors, (138), 24 states have internal predecessors, (138), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-19 04:48:12,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:48:12,642 INFO L93 Difference]: Finished difference Result 1727 states and 2325 transitions. [2022-03-19 04:48:12,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-19 04:48:12,642 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.52) internal successors, (138), 24 states have internal predecessors, (138), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) Word has length 191 [2022-03-19 04:48:12,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:48:12,646 INFO L225 Difference]: With dead ends: 1727 [2022-03-19 04:48:12,646 INFO L226 Difference]: Without dead ends: 1722 [2022-03-19 04:48:12,646 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1835, Invalid=2455, Unknown=0, NotChecked=0, Total=4290 [2022-03-19 04:48:12,646 INFO L912 BasicCegarLoop]: 93 mSDtfsCounter, 497 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 503 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 04:48:12,647 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 409 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [503 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 04:48:12,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2022-03-19 04:48:13,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1678. [2022-03-19 04:48:13,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1251 states have (on average 1.1710631494804156) internal successors, (1465), 1283 states have internal predecessors, (1465), 401 states have call successors, (401), 27 states have call predecessors, (401), 25 states have return successors, (399), 367 states have call predecessors, (399), 399 states have call successors, (399) [2022-03-19 04:48:13,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 2265 transitions. [2022-03-19 04:48:13,177 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 2265 transitions. Word has length 191 [2022-03-19 04:48:13,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:48:13,177 INFO L478 AbstractCegarLoop]: Abstraction has 1678 states and 2265 transitions. [2022-03-19 04:48:13,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.52) internal successors, (138), 24 states have internal predecessors, (138), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-19 04:48:13,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 2265 transitions. [2022-03-19 04:48:13,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-19 04:48:13,180 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:48:13,180 INFO L500 BasicCegarLoop]: trace histogram [22, 21, 21, 9, 9, 9, 9, 9, 8, 8, 8, 5, 5, 5, 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] [2022-03-19 04:48:13,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-19 04:48:13,396 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-19 04:48:13,397 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:48:13,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:48:13,397 INFO L85 PathProgramCache]: Analyzing trace with hash -715360887, now seen corresponding path program 37 times [2022-03-19 04:48:13,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:13,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [921908205] [2022-03-19 04:48:13,397 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:48:13,397 INFO L85 PathProgramCache]: Analyzing trace with hash -715360887, now seen corresponding path program 38 times [2022-03-19 04:48:13,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:48:13,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303749194] [2022-03-19 04:48:13,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:48:13,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:48:13,402 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:48:13,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703977353] [2022-03-19 04:48:13,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:48:13,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:48:13,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:48:13,413 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:48:13,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-19 04:48:13,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:48:13,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:48:13,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 04:48:13,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:48:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 78 proven. 268 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-03-19 04:48:13,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:48:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 66 proven. 280 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-03-19 04:48:14,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:48:14,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303749194] [2022-03-19 04:48:14,314 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:48:14,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703977353] [2022-03-19 04:48:14,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703977353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:48:14,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:48:14,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-19 04:48:14,314 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:48:14,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [921908205] [2022-03-19 04:48:14,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [921908205] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:48:14,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:48:14,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 04:48:14,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681843509] [2022-03-19 04:48:14,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:48:14,315 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 04:48:14,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:14,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 04:48:14,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-03-19 04:48:14,315 INFO L87 Difference]: Start difference. First operand 1678 states and 2265 transitions. Second operand has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 12 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2022-03-19 04:48:15,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:48:15,626 INFO L93 Difference]: Finished difference Result 2621 states and 3577 transitions. [2022-03-19 04:48:15,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 04:48:15,626 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 12 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) Word has length 193 [2022-03-19 04:48:15,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:48:15,633 INFO L225 Difference]: With dead ends: 2621 [2022-03-19 04:48:15,633 INFO L226 Difference]: Without dead ends: 2431 [2022-03-19 04:48:15,636 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 04:48:15,636 INFO L912 BasicCegarLoop]: 149 mSDtfsCounter, 140 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:48:15,636 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 966 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:48:15,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2022-03-19 04:48:16,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 2102. [2022-03-19 04:48:16,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 1567 states have (on average 1.169751116783663) internal successors, (1833), 1611 states have internal predecessors, (1833), 509 states have call successors, (509), 27 states have call predecessors, (509), 25 states have return successors, (507), 463 states have call predecessors, (507), 507 states have call successors, (507) [2022-03-19 04:48:16,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 2849 transitions. [2022-03-19 04:48:16,385 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 2849 transitions. Word has length 193 [2022-03-19 04:48:16,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:48:16,385 INFO L478 AbstractCegarLoop]: Abstraction has 2102 states and 2849 transitions. [2022-03-19 04:48:16,385 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 12 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2022-03-19 04:48:16,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 2849 transitions. [2022-03-19 04:48:16,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-19 04:48:16,389 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:48:16,389 INFO L500 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] [2022-03-19 04:48:16,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-19 04:48:16,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:48:16,603 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:48:16,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:48:16,604 INFO L85 PathProgramCache]: Analyzing trace with hash 179284923, now seen corresponding path program 39 times [2022-03-19 04:48:16,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:16,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [89472190] [2022-03-19 04:48:16,604 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:48:16,604 INFO L85 PathProgramCache]: Analyzing trace with hash 179284923, now seen corresponding path program 40 times [2022-03-19 04:48:16,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:48:16,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005387006] [2022-03-19 04:48:16,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:48:16,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:48:16,611 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:48:16,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653277017] [2022-03-19 04:48:16,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:48:16,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:48:16,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:48:16,612 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:48:16,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-19 04:48:16,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:48:16,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:48:16,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 04:48:16,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:48:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 1142 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:48:17,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:48:17,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 302 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-03-19 04:48:17,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:48:17,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005387006] [2022-03-19 04:48:17,781 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:48:17,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653277017] [2022-03-19 04:48:17,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653277017] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:48:17,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:48:17,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-03-19 04:48:17,781 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:48:17,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [89472190] [2022-03-19 04:48:17,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [89472190] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:48:17,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:48:17,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 04:48:17,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236725501] [2022-03-19 04:48:17,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:48:17,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 04:48:17,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:17,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 04:48:17,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 04:48:17,782 INFO L87 Difference]: Start difference. First operand 2102 states and 2849 transitions. Second operand has 25 states, 25 states have (on average 5.6) internal successors, (140), 24 states have internal predecessors, (140), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-19 04:48:19,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:48:19,165 INFO L93 Difference]: Finished difference Result 2602 states and 3604 transitions. [2022-03-19 04:48:19,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-19 04:48:19,166 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 24 states have internal predecessors, (140), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) Word has length 193 [2022-03-19 04:48:19,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:48:19,172 INFO L225 Difference]: With dead ends: 2602 [2022-03-19 04:48:19,172 INFO L226 Difference]: Without dead ends: 2174 [2022-03-19 04:48:19,173 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1895, Invalid=2527, Unknown=0, NotChecked=0, Total=4422 [2022-03-19 04:48:19,173 INFO L912 BasicCegarLoop]: 93 mSDtfsCounter, 390 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 04:48:19,174 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 420 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 04:48:19,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2022-03-19 04:48:19,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 2144. [2022-03-19 04:48:19,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 1609 states have (on average 1.170913610938471) internal successors, (1884), 1637 states have internal predecessors, (1884), 509 states have call successors, (509), 27 states have call predecessors, (509), 25 states have return successors, (507), 479 states have call predecessors, (507), 507 states have call successors, (507) [2022-03-19 04:48:19,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 2900 transitions. [2022-03-19 04:48:19,965 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 2900 transitions. Word has length 193 [2022-03-19 04:48:19,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:48:19,965 INFO L478 AbstractCegarLoop]: Abstraction has 2144 states and 2900 transitions. [2022-03-19 04:48:19,965 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 24 states have internal predecessors, (140), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-19 04:48:19,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 2900 transitions. [2022-03-19 04:48:19,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-03-19 04:48:19,971 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:48:19,971 INFO L500 BasicCegarLoop]: trace histogram [22, 21, 21, 12, 11, 11, 11, 8, 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] [2022-03-19 04:48:19,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-19 04:48:20,172 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:48:20,173 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:48:20,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:48:20,173 INFO L85 PathProgramCache]: Analyzing trace with hash -214855630, now seen corresponding path program 35 times [2022-03-19 04:48:20,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:20,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1952991675] [2022-03-19 04:48:20,174 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:48:20,174 INFO L85 PathProgramCache]: Analyzing trace with hash -214855630, now seen corresponding path program 36 times [2022-03-19 04:48:20,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:48:20,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938061211] [2022-03-19 04:48:20,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:48:20,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:48:20,186 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:48:20,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989971486] [2022-03-19 04:48:20,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:48:20,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:48:20,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:48:20,188 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:48:20,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-19 04:48:23,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-19 04:48:23,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:48:23,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 04:48:23,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:48:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 84 proven. 292 refuted. 0 times theorem prover too weak. 856 trivial. 0 not checked. [2022-03-19 04:48:24,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:48:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 84 proven. 292 refuted. 0 times theorem prover too weak. 856 trivial. 0 not checked. [2022-03-19 04:48:25,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:48:25,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938061211] [2022-03-19 04:48:25,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:48:25,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989971486] [2022-03-19 04:48:25,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989971486] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:48:25,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:48:25,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2022-03-19 04:48:25,017 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:48:25,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1952991675] [2022-03-19 04:48:25,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1952991675] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:48:25,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:48:25,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 04:48:25,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142118864] [2022-03-19 04:48:25,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:48:25,018 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 04:48:25,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:25,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 04:48:25,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-03-19 04:48:25,018 INFO L87 Difference]: Start difference. First operand 2144 states and 2900 transitions. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 11 states have call predecessors, (21), 11 states have call successors, (21) [2022-03-19 04:48:26,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:48:26,417 INFO L93 Difference]: Finished difference Result 2646 states and 3588 transitions. [2022-03-19 04:48:26,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 04:48:26,418 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 11 states have call predecessors, (21), 11 states have call successors, (21) Word has length 195 [2022-03-19 04:48:26,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:48:26,429 INFO L225 Difference]: With dead ends: 2646 [2022-03-19 04:48:26,429 INFO L226 Difference]: Without dead ends: 2516 [2022-03-19 04:48:26,429 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 371 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-03-19 04:48:26,430 INFO L912 BasicCegarLoop]: 233 mSDtfsCounter, 146 mSDsluCounter, 1548 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1781 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 04:48:26,430 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 1781 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 04:48:26,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2022-03-19 04:48:27,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 2351. [2022-03-19 04:48:27,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 1766 states have (on average 1.1766704416761042) internal successors, (2078), 1797 states have internal predecessors, (2078), 559 states have call successors, (559), 27 states have call predecessors, (559), 25 states have return successors, (557), 526 states have call predecessors, (557), 557 states have call successors, (557) [2022-03-19 04:48:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 3194 transitions. [2022-03-19 04:48:27,149 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 3194 transitions. Word has length 195 [2022-03-19 04:48:27,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:48:27,149 INFO L478 AbstractCegarLoop]: Abstraction has 2351 states and 3194 transitions. [2022-03-19 04:48:27,149 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 11 states have call predecessors, (21), 11 states have call successors, (21) [2022-03-19 04:48:27,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 3194 transitions. [2022-03-19 04:48:27,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-03-19 04:48:27,153 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:48:27,153 INFO L500 BasicCegarLoop]: trace histogram [22, 21, 21, 12, 11, 11, 11, 8, 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] [2022-03-19 04:48:27,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-19 04:48:27,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:48:27,359 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:48:27,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:48:27,360 INFO L85 PathProgramCache]: Analyzing trace with hash 667376690, now seen corresponding path program 37 times [2022-03-19 04:48:27,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:27,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1852579269] [2022-03-19 04:48:27,360 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:48:27,360 INFO L85 PathProgramCache]: Analyzing trace with hash 667376690, now seen corresponding path program 38 times [2022-03-19 04:48:27,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:48:27,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584354841] [2022-03-19 04:48:27,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:48:27,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:48:27,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:48:27,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1784191374] [2022-03-19 04:48:27,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:48:27,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:48:27,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:48:27,368 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:48:27,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-19 04:48:27,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:48:27,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:48:27,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 04:48:27,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:48:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 62 proven. 1166 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:48:27,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:48:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 62 proven. 326 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-03-19 04:48:28,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:48:28,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584354841] [2022-03-19 04:48:28,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:48:28,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784191374] [2022-03-19 04:48:28,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784191374] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:48:28,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:48:28,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-03-19 04:48:28,524 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:48:28,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1852579269] [2022-03-19 04:48:28,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1852579269] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:48:28,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:48:28,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 04:48:28,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041466993] [2022-03-19 04:48:28,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:48:28,539 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 04:48:28,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:28,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 04:48:28,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 04:48:28,540 INFO L87 Difference]: Start difference. First operand 2351 states and 3194 transitions. Second operand has 25 states, 25 states have (on average 5.68) internal successors, (142), 24 states have internal predecessors, (142), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-19 04:48:30,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:48:30,054 INFO L93 Difference]: Finished difference Result 2915 states and 4055 transitions. [2022-03-19 04:48:30,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-19 04:48:30,054 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.68) internal successors, (142), 24 states have internal predecessors, (142), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) Word has length 195 [2022-03-19 04:48:30,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:48:30,061 INFO L225 Difference]: With dead ends: 2915 [2022-03-19 04:48:30,061 INFO L226 Difference]: Without dead ends: 2408 [2022-03-19 04:48:30,063 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1960, Invalid=2596, Unknown=0, NotChecked=0, Total=4556 [2022-03-19 04:48:30,063 INFO L912 BasicCegarLoop]: 93 mSDtfsCounter, 359 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 04:48:30,063 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 457 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 04:48:30,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2022-03-19 04:48:30,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 2386. [2022-03-19 04:48:30,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2386 states, 1806 states have (on average 1.172203765227021) internal successors, (2117), 1822 states have internal predecessors, (2117), 554 states have call successors, (554), 27 states have call predecessors, (554), 25 states have return successors, (552), 536 states have call predecessors, (552), 552 states have call successors, (552) [2022-03-19 04:48:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2386 states to 2386 states and 3223 transitions. [2022-03-19 04:48:30,960 INFO L78 Accepts]: Start accepts. Automaton has 2386 states and 3223 transitions. Word has length 195 [2022-03-19 04:48:30,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:48:30,960 INFO L478 AbstractCegarLoop]: Abstraction has 2386 states and 3223 transitions. [2022-03-19 04:48:30,960 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.68) internal successors, (142), 24 states have internal predecessors, (142), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-19 04:48:30,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2386 states and 3223 transitions. [2022-03-19 04:48:30,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-03-19 04:48:30,965 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:48:30,965 INFO L500 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] [2022-03-19 04:48:30,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-19 04:48:31,173 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-03-19 04:48:31,174 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:48:31,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:48:31,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1172412185, now seen corresponding path program 27 times [2022-03-19 04:48:31,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:31,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1674325407] [2022-03-19 04:48:31,174 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:48:31,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1172412185, now seen corresponding path program 28 times [2022-03-19 04:48:31,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:48:31,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380165902] [2022-03-19 04:48:31,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:48:31,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:48:31,179 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:48:31,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [591032392] [2022-03-19 04:48:31,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:48:31,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:48:31,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:48:31,181 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:48:31,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-19 04:48:31,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:48:31,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:48:31,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-19 04:48:31,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:48:31,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 1248 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:48:31,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:48:32,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 324 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-03-19 04:48:32,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:48:32,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380165902] [2022-03-19 04:48:32,356 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:48:32,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591032392] [2022-03-19 04:48:32,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591032392] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:48:32,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:48:32,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-03-19 04:48:32,357 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:48:32,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1674325407] [2022-03-19 04:48:32,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1674325407] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:48:32,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:48:32,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-19 04:48:32,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746295116] [2022-03-19 04:48:32,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:48:32,357 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 04:48:32,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:32,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 04:48:32,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 04:48:32,358 INFO L87 Difference]: Start difference. First operand 2386 states and 3223 transitions. Second operand has 26 states, 26 states have (on average 5.538461538461538) internal successors, (144), 25 states have internal predecessors, (144), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-19 04:48:34,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:48:34,103 INFO L93 Difference]: Finished difference Result 2530 states and 3429 transitions. [2022-03-19 04:48:34,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-19 04:48:34,103 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.538461538461538) internal successors, (144), 25 states have internal predecessors, (144), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) Word has length 199 [2022-03-19 04:48:34,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:48:34,129 INFO L225 Difference]: With dead ends: 2530 [2022-03-19 04:48:34,129 INFO L226 Difference]: Without dead ends: 2525 [2022-03-19 04:48:34,130 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2010, Invalid=2682, Unknown=0, NotChecked=0, Total=4692 [2022-03-19 04:48:34,130 INFO L912 BasicCegarLoop]: 96 mSDtfsCounter, 438 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 04:48:34,130 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 466 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 04:48:34,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2022-03-19 04:48:34,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 2454. [2022-03-19 04:48:34,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2454 states, 1831 states have (on average 1.1714909885308575) internal successors, (2145), 1881 states have internal predecessors, (2145), 596 states have call successors, (596), 28 states have call predecessors, (596), 26 states have return successors, (594), 544 states have call predecessors, (594), 594 states have call successors, (594) [2022-03-19 04:48:34,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2454 states to 2454 states and 3335 transitions. [2022-03-19 04:48:34,937 INFO L78 Accepts]: Start accepts. Automaton has 2454 states and 3335 transitions. Word has length 199 [2022-03-19 04:48:34,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:48:34,937 INFO L478 AbstractCegarLoop]: Abstraction has 2454 states and 3335 transitions. [2022-03-19 04:48:34,938 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.538461538461538) internal successors, (144), 25 states have internal predecessors, (144), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-19 04:48:34,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2454 states and 3335 transitions. [2022-03-19 04:48:34,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-03-19 04:48:34,941 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:48:34,941 INFO L500 BasicCegarLoop]: trace histogram [23, 22, 22, 11, 11, 11, 11, 8, 7, 7, 7, 7, 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] [2022-03-19 04:48:34,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-19 04:48:35,148 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:48:35,148 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:48:35,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:48:35,148 INFO L85 PathProgramCache]: Analyzing trace with hash 866967454, now seen corresponding path program 41 times [2022-03-19 04:48:35,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:48:35,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1248411815] [2022-03-19 04:48:35,149 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:48:35,149 INFO L85 PathProgramCache]: Analyzing trace with hash 866967454, now seen corresponding path program 42 times [2022-03-19 04:48:35,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:48:35,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782574519] [2022-03-19 04:48:35,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:48:35,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:48:35,156 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:48:35,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694920601] [2022-03-19 04:48:35,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:48:35,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:48:35,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:48:35,165 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:48:35,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process