/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/egcd-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 14:55:45,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 14:55:45,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 14:55:45,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 14:55:45,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 14:55:45,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 14:55:45,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 14:55:45,845 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 14:55:45,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 14:55:45,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 14:55:45,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 14:55:45,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 14:55:45,856 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 14:55:45,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 14:55:45,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 14:55:45,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 14:55:45,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 14:55:45,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 14:55:45,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 14:55:45,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 14:55:45,871 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 14:55:45,872 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 14:55:45,879 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 14:55:45,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 14:55:45,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 14:55:45,881 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 14:55:45,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 14:55:45,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 14:55:45,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 14:55:45,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 14:55:45,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 14:55:45,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 14:55:45,882 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 14:55:45,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 14:55:45,882 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 14:55:45,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 14:55:45,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 14:55:45,883 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 14:55:45,883 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 14:55:45,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 14:55:45,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 14:55:45,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 14:55:45,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 14:55:45,883 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 14:55:45,884 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 14:55:45,884 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 14:55:45,884 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 14:55:45,884 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 14:55:46,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 14:55:46,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 14:55:46,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 14:55:46,101 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 14:55:46,101 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 14:55:46,102 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound5.c [2022-03-20 14:55:46,165 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81c654d3e/0afd34f8269f4018ab6506b98346616d/FLAGe176a0d02 [2022-03-20 14:55:46,536 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 14:55:46,537 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound5.c [2022-03-20 14:55:46,543 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81c654d3e/0afd34f8269f4018ab6506b98346616d/FLAGe176a0d02 [2022-03-20 14:55:46,945 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81c654d3e/0afd34f8269f4018ab6506b98346616d [2022-03-20 14:55:46,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 14:55:46,947 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 14:55:46,950 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 14:55:46,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 14:55:46,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 14:55:46,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:55:46" (1/1) ... [2022-03-20 14:55:46,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69398885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:55:46, skipping insertion in model container [2022-03-20 14:55:46,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:55:46" (1/1) ... [2022-03-20 14:55:46,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 14:55:46,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 14:55:47,092 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/egcd-ll_valuebound5.c[489,502] [2022-03-20 14:55:47,143 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 14:55:47,153 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 14:55:47,161 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/egcd-ll_valuebound5.c[489,502] [2022-03-20 14:55:47,165 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 14:55:47,174 INFO L208 MainTranslator]: Completed translation [2022-03-20 14:55:47,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:55:47 WrapperNode [2022-03-20 14:55:47,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 14:55:47,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 14:55:47,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 14:55:47,176 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 14:55:47,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:55:47" (1/1) ... [2022-03-20 14:55:47,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:55:47" (1/1) ... [2022-03-20 14:55:47,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:55:47" (1/1) ... [2022-03-20 14:55:47,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:55:47" (1/1) ... [2022-03-20 14:55:47,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:55:47" (1/1) ... [2022-03-20 14:55:47,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:55:47" (1/1) ... [2022-03-20 14:55:47,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:55:47" (1/1) ... [2022-03-20 14:55:47,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 14:55:47,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 14:55:47,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 14:55:47,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 14:55:47,217 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:55:47" (1/1) ... [2022-03-20 14:55:47,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 14:55:47,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:47,244 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) [2022-03-20 14:55:47,250 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 [2022-03-20 14:55:47,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 14:55:47,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 14:55:47,291 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 14:55:47,291 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 14:55:47,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 14:55:47,291 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 14:55:47,291 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 14:55:47,291 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 14:55:47,291 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 14:55:47,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 14:55:47,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 14:55:47,291 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 14:55:47,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 14:55:47,292 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 14:55:47,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 14:55:47,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 14:55:47,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 14:55:47,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 14:55:47,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 14:55:47,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 14:55:47,340 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 14:55:47,341 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 14:55:47,431 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 14:55:47,435 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 14:55:47,435 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 14:55:47,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:55:47 BoogieIcfgContainer [2022-03-20 14:55:47,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 14:55:47,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 14:55:47,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 14:55:47,443 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 14:55:47,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 02:55:46" (1/3) ... [2022-03-20 14:55:47,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@677d155c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:55:47, skipping insertion in model container [2022-03-20 14:55:47,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:55:47" (2/3) ... [2022-03-20 14:55:47,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@677d155c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:55:47, skipping insertion in model container [2022-03-20 14:55:47,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:55:47" (3/3) ... [2022-03-20 14:55:47,446 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound5.c [2022-03-20 14:55:47,465 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 14:55:47,465 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 14:55:47,508 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 14:55:47,513 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 [2022-03-20 14:55:47,513 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 14:55:47,534 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 14:55:47,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 14:55:47,543 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:47,543 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:55:47,544 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:47,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:47,548 INFO L85 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 1 times [2022-03-20 14:55:47,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:47,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1668727989] [2022-03-20 14:55:47,562 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:47,562 INFO L85 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 2 times [2022-03-20 14:55:47,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:47,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754366158] [2022-03-20 14:55:47,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:47,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:55:47,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 14:55:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:55:47,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 14:55:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:55:47,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 14:55:47,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:55:47,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 14:55:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:55:47,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 14:55:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:55:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 14:55:47,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:47,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754366158] [2022-03-20 14:55:47,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754366158] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:47,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:47,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 14:55:47,718 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:47,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1668727989] [2022-03-20 14:55:47,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1668727989] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:47,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:47,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 14:55:47,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345970120] [2022-03-20 14:55:47,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:47,723 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 14:55:47,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:47,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 14:55:47,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 14:55:47,743 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 14:55:47,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:47,859 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2022-03-20 14:55:47,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 14:55:47,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 14:55:47,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:47,875 INFO L225 Difference]: With dead ends: 67 [2022-03-20 14:55:47,875 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 14:55:47,879 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 14:55:47,884 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:47,885 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:55:47,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 14:55:47,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 14:55:47,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 14:55:47,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-20 14:55:47,933 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2022-03-20 14:55:47,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:47,934 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-20 14:55:47,934 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 14:55:47,934 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-20 14:55:47,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 14:55:47,936 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:47,937 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:55:47,937 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 14:55:47,938 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:47,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:47,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 1 times [2022-03-20 14:55:47,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:47,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [801066492] [2022-03-20 14:55:47,943 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:47,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 2 times [2022-03-20 14:55:47,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:47,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394046495] [2022-03-20 14:55:47,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:47,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:47,986 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:47,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104113891] [2022-03-20 14:55:47,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:55:47,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:47,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:48,002 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) [2022-03-20 14:55:48,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 14:55:48,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 14:55:48,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:48,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 14:55:48,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 14:55:48,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:55:48,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:48,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394046495] [2022-03-20 14:55:48,231 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:48,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104113891] [2022-03-20 14:55:48,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104113891] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:48,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:48,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:55:48,233 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:48,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [801066492] [2022-03-20 14:55:48,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [801066492] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:48,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:48,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:55:48,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749243721] [2022-03-20 14:55:48,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:48,234 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:55:48,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:48,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:55:48,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:55:48,234 INFO L87 Difference]: Start difference. First operand 32 states and 42 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 14:55:48,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:48,272 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2022-03-20 14:55:48,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:55:48,272 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-03-20 14:55:48,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:48,273 INFO L225 Difference]: With dead ends: 48 [2022-03-20 14:55:48,273 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 14:55:48,274 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 14:55:48,274 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:48,275 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 155 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:55:48,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 14:55:48,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-03-20 14:55:48,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 14:55:48,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2022-03-20 14:55:48,298 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2022-03-20 14:55:48,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:48,299 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2022-03-20 14:55:48,299 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 14:55:48,299 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2022-03-20 14:55:48,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 14:55:48,300 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:48,300 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-03-20 14:55:48,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 14:55:48,502 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:48,502 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:48,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:48,503 INFO L85 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 1 times [2022-03-20 14:55:48,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:48,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [136848932] [2022-03-20 14:55:48,504 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:48,504 INFO L85 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 2 times [2022-03-20 14:55:48,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:48,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756780449] [2022-03-20 14:55:48,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:48,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:48,536 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:48,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29326052] [2022-03-20 14:55:48,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:55:48,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:48,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:48,552 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) [2022-03-20 14:55:48,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 14:55:48,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:55:48,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:48,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 14:55:48,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 14:55:48,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:55:48,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:48,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756780449] [2022-03-20 14:55:48,709 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:48,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29326052] [2022-03-20 14:55:48,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29326052] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:48,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:48,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:55:48,709 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:48,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [136848932] [2022-03-20 14:55:48,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [136848932] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:48,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:48,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:55:48,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528732561] [2022-03-20 14:55:48,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:48,710 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:55:48,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:48,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:55:48,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:55:48,711 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 14:55:48,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:48,746 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2022-03-20 14:55:48,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:55:48,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-03-20 14:55:48,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:48,747 INFO L225 Difference]: With dead ends: 52 [2022-03-20 14:55:48,747 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 14:55:48,747 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 14:55:48,748 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:48,748 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 156 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:55:48,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 14:55:48,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-03-20 14:55:48,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 14:55:48,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2022-03-20 14:55:48,756 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 38 [2022-03-20 14:55:48,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:48,757 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2022-03-20 14:55:48,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 14:55:48,757 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2022-03-20 14:55:48,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 14:55:48,758 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:48,758 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:55:48,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:48,975 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,SelfDestructingSolverStorable2 [2022-03-20 14:55:48,976 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:48,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:48,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 1 times [2022-03-20 14:55:48,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:48,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [114879985] [2022-03-20 14:55:48,977 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:48,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 2 times [2022-03-20 14:55:48,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:48,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829721765] [2022-03-20 14:55:48,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:48,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:49,000 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:49,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197083728] [2022-03-20 14:55:49,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:55:49,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:49,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:49,002 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) [2022-03-20 14:55:49,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 14:55:49,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:55:49,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:49,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 14:55:49,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 14:55:49,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:55:49,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:49,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829721765] [2022-03-20 14:55:49,118 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:49,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197083728] [2022-03-20 14:55:49,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197083728] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:49,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:49,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:55:49,119 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:49,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [114879985] [2022-03-20 14:55:49,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [114879985] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:49,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:49,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:55:49,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38960859] [2022-03-20 14:55:49,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:49,119 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:55:49,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:49,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:55:49,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:55:49,120 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 14:55:49,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:49,154 INFO L93 Difference]: Finished difference Result 74 states and 105 transitions. [2022-03-20 14:55:49,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:55:49,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-03-20 14:55:49,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:49,156 INFO L225 Difference]: With dead ends: 74 [2022-03-20 14:55:49,156 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 14:55:49,156 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 14:55:49,157 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:49,157 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 155 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:55:49,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 14:55:49,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-20 14:55:49,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 37 states have internal predecessors, (42), 30 states have call successors, (30), 7 states have call predecessors, (30), 6 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 14:55:49,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2022-03-20 14:55:49,174 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 43 [2022-03-20 14:55:49,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:49,174 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2022-03-20 14:55:49,174 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 14:55:49,174 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2022-03-20 14:55:49,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 14:55:49,175 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:49,175 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:55:49,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:49,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:49,405 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:49,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:49,406 INFO L85 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 1 times [2022-03-20 14:55:49,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:49,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1736596480] [2022-03-20 14:55:49,406 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:49,406 INFO L85 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 2 times [2022-03-20 14:55:49,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:49,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102981836] [2022-03-20 14:55:49,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:49,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:49,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:49,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705409258] [2022-03-20 14:55:49,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:55:49,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:49,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:49,417 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) [2022-03-20 14:55:49,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 14:55:49,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:55:49,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:49,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 14:55:49,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 14:55:49,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:55:49,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:49,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102981836] [2022-03-20 14:55:49,515 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:49,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705409258] [2022-03-20 14:55:49,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705409258] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:49,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:49,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:55:49,516 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:49,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1736596480] [2022-03-20 14:55:49,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1736596480] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:49,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:49,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:55:49,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512279943] [2022-03-20 14:55:49,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:49,516 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:55:49,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:49,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:55:49,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:55:49,517 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-20 14:55:49,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:49,544 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2022-03-20 14:55:49,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:55:49,545 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2022-03-20 14:55:49,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:49,546 INFO L225 Difference]: With dead ends: 76 [2022-03-20 14:55:49,546 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 14:55:49,546 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 14:55:49,547 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:49,547 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 147 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:55:49,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 14:55:49,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-03-20 14:55:49,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 36 states have (on average 1.25) internal successors, (45), 40 states have internal predecessors, (45), 30 states have call successors, (30), 8 states have call predecessors, (30), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 14:55:49,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 101 transitions. [2022-03-20 14:55:49,555 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 101 transitions. Word has length 49 [2022-03-20 14:55:49,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:49,556 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 101 transitions. [2022-03-20 14:55:49,556 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-20 14:55:49,556 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 101 transitions. [2022-03-20 14:55:49,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 14:55:49,557 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:49,557 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:55:49,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:49,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:49,768 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:49,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:49,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1164909737, now seen corresponding path program 1 times [2022-03-20 14:55:49,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:49,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [626860424] [2022-03-20 14:55:49,769 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:49,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1164909737, now seen corresponding path program 2 times [2022-03-20 14:55:49,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:49,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607159207] [2022-03-20 14:55:49,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:49,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:49,780 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:49,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657220851] [2022-03-20 14:55:49,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:55:49,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:49,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:49,788 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) [2022-03-20 14:55:49,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 14:55:49,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:55:49,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:49,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 14:55:49,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-20 14:55:49,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:55:49,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:49,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607159207] [2022-03-20 14:55:49,970 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:49,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657220851] [2022-03-20 14:55:49,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657220851] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:49,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:49,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:55:49,971 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:49,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [626860424] [2022-03-20 14:55:49,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [626860424] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:49,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:49,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:55:49,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324743389] [2022-03-20 14:55:49,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:49,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:55:49,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:49,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:55:49,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:55:49,972 INFO L87 Difference]: Start difference. First operand 74 states and 101 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 14:55:49,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:49,998 INFO L93 Difference]: Finished difference Result 84 states and 109 transitions. [2022-03-20 14:55:49,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:55:49,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-03-20 14:55:49,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:50,000 INFO L225 Difference]: With dead ends: 84 [2022-03-20 14:55:50,000 INFO L226 Difference]: Without dead ends: 81 [2022-03-20 14:55:50,000 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 14:55:50,001 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:50,001 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 158 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:55:50,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-20 14:55:50,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-03-20 14:55:50,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 14:55:50,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2022-03-20 14:55:50,008 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2022-03-20 14:55:50,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:50,009 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2022-03-20 14:55:50,009 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 14:55:50,009 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2022-03-20 14:55:50,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 14:55:50,010 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:50,010 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2022-03-20 14:55:50,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:50,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:50,228 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:50,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:50,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 1 times [2022-03-20 14:55:50,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:50,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [613930353] [2022-03-20 14:55:50,229 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:50,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 2 times [2022-03-20 14:55:50,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:50,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841898393] [2022-03-20 14:55:50,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:50,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:50,238 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:50,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403958212] [2022-03-20 14:55:50,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:55:50,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:50,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:50,240 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) [2022-03-20 14:55:50,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 14:55:50,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:55:50,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:50,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 14:55:50,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:50,397 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 14:55:50,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:50,553 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 14:55:50,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:50,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841898393] [2022-03-20 14:55:50,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:50,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403958212] [2022-03-20 14:55:50,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403958212] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:50,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:50,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 14:55:50,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:50,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [613930353] [2022-03-20 14:55:50,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [613930353] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:50,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:50,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 14:55:50,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589484104] [2022-03-20 14:55:50,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:50,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 14:55:50,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:50,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 14:55:50,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 14:55:50,555 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 14:55:50,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:50,633 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2022-03-20 14:55:50,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 14:55:50,634 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2022-03-20 14:55:50,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:50,635 INFO L225 Difference]: With dead ends: 88 [2022-03-20 14:55:50,635 INFO L226 Difference]: Without dead ends: 84 [2022-03-20 14:55:50,635 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 14:55:50,636 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 14 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:50,636 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 158 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:55:50,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-20 14:55:50,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-03-20 14:55:50,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 14:55:50,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2022-03-20 14:55:50,645 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2022-03-20 14:55:50,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:50,645 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2022-03-20 14:55:50,645 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 14:55:50,645 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2022-03-20 14:55:50,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 14:55:50,646 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:50,646 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 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] [2022-03-20 14:55:50,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:50,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:50,864 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:50,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:50,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 3 times [2022-03-20 14:55:50,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:50,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1954359159] [2022-03-20 14:55:50,865 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:50,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 4 times [2022-03-20 14:55:50,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:50,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609684264] [2022-03-20 14:55:50,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:50,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:50,874 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:50,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2025705766] [2022-03-20 14:55:50,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:55:50,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:50,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:50,875 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) [2022-03-20 14:55:50,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 14:55:50,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:55:50,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:50,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 14:55:50,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 14:55:51,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 14:55:51,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:51,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609684264] [2022-03-20 14:55:51,282 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:51,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025705766] [2022-03-20 14:55:51,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025705766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:51,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:51,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-03-20 14:55:51,283 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:51,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1954359159] [2022-03-20 14:55:51,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1954359159] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:51,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:51,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 14:55:51,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883283213] [2022-03-20 14:55:51,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:51,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 14:55:51,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:51,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 14:55:51,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-20 14:55:51,284 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 14:55:51,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:51,436 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2022-03-20 14:55:51,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 14:55:51,437 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2022-03-20 14:55:51,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:51,438 INFO L225 Difference]: With dead ends: 118 [2022-03-20 14:55:51,438 INFO L226 Difference]: Without dead ends: 116 [2022-03-20 14:55:51,438 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-03-20 14:55:51,439 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 21 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:51,439 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 224 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:55:51,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-20 14:55:51,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2022-03-20 14:55:51,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 14:55:51,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2022-03-20 14:55:51,464 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2022-03-20 14:55:51,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:51,464 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2022-03-20 14:55:51,464 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 14:55:51,464 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2022-03-20 14:55:51,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 14:55:51,465 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:51,465 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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] [2022-03-20 14:55:51,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:51,665 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:51,666 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:51,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:51,666 INFO L85 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 1 times [2022-03-20 14:55:51,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:51,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [570833824] [2022-03-20 14:55:51,667 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:51,667 INFO L85 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 2 times [2022-03-20 14:55:51,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:51,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263222543] [2022-03-20 14:55:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:51,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:51,676 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:51,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616097734] [2022-03-20 14:55:51,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:55:51,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:51,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:51,678 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) [2022-03-20 14:55:51,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 14:55:51,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:55:51,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:51,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 14:55:51,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 14:55:51,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:52,092 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 14:55:52,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:52,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263222543] [2022-03-20 14:55:52,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:52,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616097734] [2022-03-20 14:55:52,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616097734] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:52,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:52,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-20 14:55:52,093 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:52,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [570833824] [2022-03-20 14:55:52,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [570833824] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:52,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:52,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 14:55:52,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501256578] [2022-03-20 14:55:52,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:52,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 14:55:52,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:52,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 14:55:52,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 14:55:52,094 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-20 14:55:52,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:52,192 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2022-03-20 14:55:52,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 14:55:52,192 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 61 [2022-03-20 14:55:52,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:52,194 INFO L225 Difference]: With dead ends: 137 [2022-03-20 14:55:52,194 INFO L226 Difference]: Without dead ends: 131 [2022-03-20 14:55:52,194 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 14:55:52,194 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:52,195 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 198 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:55:52,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-20 14:55:52,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-03-20 14:55:52,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 42 states have call successors, (42), 16 states have call predecessors, (42), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2022-03-20 14:55:52,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2022-03-20 14:55:52,206 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2022-03-20 14:55:52,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:52,206 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2022-03-20 14:55:52,207 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-20 14:55:52,207 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2022-03-20 14:55:52,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 14:55:52,207 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:52,207 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:55:52,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:52,423 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,SelfDestructingSolverStorable8 [2022-03-20 14:55:52,424 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:52,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:52,424 INFO L85 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 1 times [2022-03-20 14:55:52,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:52,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [597427862] [2022-03-20 14:55:52,425 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:52,425 INFO L85 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 2 times [2022-03-20 14:55:52,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:52,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528626969] [2022-03-20 14:55:52,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:52,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:52,432 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:52,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049624613] [2022-03-20 14:55:52,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:55:52,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:52,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:52,440 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) [2022-03-20 14:55:52,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 14:55:52,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:55:52,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:52,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 14:55:52,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:52,693 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 14:55:52,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-03-20 14:55:52,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:52,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528626969] [2022-03-20 14:55:52,833 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:52,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049624613] [2022-03-20 14:55:52,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049624613] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 14:55:52,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 14:55:52,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-03-20 14:55:52,833 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:52,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [597427862] [2022-03-20 14:55:52,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [597427862] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:52,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:52,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:55:52,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490300477] [2022-03-20 14:55:52,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:52,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:55:52,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:52,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:55:52,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 14:55:52,835 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 14:55:52,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:52,867 INFO L93 Difference]: Finished difference Result 137 states and 172 transitions. [2022-03-20 14:55:52,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:55:52,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 69 [2022-03-20 14:55:52,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:52,869 INFO L225 Difference]: With dead ends: 137 [2022-03-20 14:55:52,869 INFO L226 Difference]: Without dead ends: 132 [2022-03-20 14:55:52,869 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 14:55:52,870 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:52,870 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 128 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:55:52,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-20 14:55:52,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-03-20 14:55:52,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 79 states have internal predecessors, (88), 39 states have call successors, (39), 17 states have call predecessors, (39), 16 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 14:55:52,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 164 transitions. [2022-03-20 14:55:52,881 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 164 transitions. Word has length 69 [2022-03-20 14:55:52,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:52,881 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 164 transitions. [2022-03-20 14:55:52,881 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 14:55:52,881 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 164 transitions. [2022-03-20 14:55:52,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 14:55:52,882 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:52,882 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2022-03-20 14:55:52,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:53,096 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 14:55:53,096 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:53,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:53,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 5 times [2022-03-20 14:55:53,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:53,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2013000649] [2022-03-20 14:55:53,097 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:53,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 6 times [2022-03-20 14:55:53,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:53,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028599115] [2022-03-20 14:55:53,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:53,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:53,104 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:53,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050642791] [2022-03-20 14:55:53,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:55:53,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:53,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:53,108 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) [2022-03-20 14:55:53,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 14:55:53,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 14:55:53,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:53,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 14:55:53,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:53,842 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-20 14:55:53,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:54,319 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:56:00,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:56:00,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028599115] [2022-03-20 14:56:00,780 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:56:00,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050642791] [2022-03-20 14:56:00,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050642791] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 14:56:00,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 14:56:00,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-20 14:56:00,780 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:56:00,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2013000649] [2022-03-20 14:56:00,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2013000649] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:56:00,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:56:00,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 14:56:00,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394342370] [2022-03-20 14:56:00,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:56:00,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 14:56:00,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:00,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 14:56:00,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=381, Unknown=3, NotChecked=0, Total=462 [2022-03-20 14:56:00,781 INFO L87 Difference]: Start difference. First operand 132 states and 164 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-03-20 14:56:01,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:56:01,275 INFO L93 Difference]: Finished difference Result 162 states and 204 transitions. [2022-03-20 14:56:01,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 14:56:01,276 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 74 [2022-03-20 14:56:01,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:56:01,277 INFO L225 Difference]: With dead ends: 162 [2022-03-20 14:56:01,277 INFO L226 Difference]: Without dead ends: 160 [2022-03-20 14:56:01,277 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=96, Invalid=501, Unknown=3, NotChecked=0, Total=600 [2022-03-20 14:56:01,278 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 31 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 14:56:01,278 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 292 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 422 Invalid, 0 Unknown, 67 Unchecked, 0.4s Time] [2022-03-20 14:56:01,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-20 14:56:01,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 142. [2022-03-20 14:56:01,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 85 states have internal predecessors, (95), 42 states have call successors, (42), 18 states have call predecessors, (42), 17 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-20 14:56:01,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 177 transitions. [2022-03-20 14:56:01,293 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 177 transitions. Word has length 74 [2022-03-20 14:56:01,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:56:01,293 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 177 transitions. [2022-03-20 14:56:01,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-03-20 14:56:01,293 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 177 transitions. [2022-03-20 14:56:01,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 14:56:01,294 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:56:01,294 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2022-03-20 14:56:01,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-20 14:56:01,511 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,SelfDestructingSolverStorable10 [2022-03-20 14:56:01,511 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:56:01,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:56:01,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 3 times [2022-03-20 14:56:01,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:01,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [773945195] [2022-03-20 14:56:01,512 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:56:01,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 4 times [2022-03-20 14:56:01,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:56:01,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894581566] [2022-03-20 14:56:01,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:56:01,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:56:01,524 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:56:01,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938453218] [2022-03-20 14:56:01,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:56:01,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:01,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:56:01,528 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) [2022-03-20 14:56:01,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 14:56:01,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:56:01,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:56:01,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 14:56:01,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:56:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-03-20 14:56:02,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:56:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-20 14:56:02,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:56:02,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894581566] [2022-03-20 14:56:02,520 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:56:02,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938453218] [2022-03-20 14:56:02,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938453218] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:56:02,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:56:02,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2022-03-20 14:56:02,520 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:56:02,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [773945195] [2022-03-20 14:56:02,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [773945195] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:56:02,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:56:02,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 14:56:02,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147336341] [2022-03-20 14:56:02,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:56:02,521 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 14:56:02,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:02,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 14:56:02,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-03-20 14:56:02,522 INFO L87 Difference]: Start difference. First operand 142 states and 177 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 14:56:02,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:56:02,830 INFO L93 Difference]: Finished difference Result 180 states and 222 transitions. [2022-03-20 14:56:02,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 14:56:02,831 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2022-03-20 14:56:02,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:56:02,832 INFO L225 Difference]: With dead ends: 180 [2022-03-20 14:56:02,832 INFO L226 Difference]: Without dead ends: 178 [2022-03-20 14:56:02,832 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-03-20 14:56:02,833 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 26 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:56:02,833 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 209 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:56:02,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-03-20 14:56:02,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 164. [2022-03-20 14:56:02,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 97 states have (on average 1.1443298969072164) internal successors, (111), 100 states have internal predecessors, (111), 45 states have call successors, (45), 22 states have call predecessors, (45), 21 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-20 14:56:02,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 199 transitions. [2022-03-20 14:56:02,850 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 199 transitions. Word has length 74 [2022-03-20 14:56:02,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:56:02,850 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 199 transitions. [2022-03-20 14:56:02,850 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 14:56:02,850 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 199 transitions. [2022-03-20 14:56:02,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 14:56:02,851 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:56:02,851 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:56:02,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 14:56:03,065 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,SelfDestructingSolverStorable11 [2022-03-20 14:56:03,065 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:56:03,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:56:03,065 INFO L85 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 5 times [2022-03-20 14:56:03,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:03,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1636040569] [2022-03-20 14:56:03,066 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:56:03,066 INFO L85 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 6 times [2022-03-20 14:56:03,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:56:03,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739793285] [2022-03-20 14:56:03,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:56:03,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:56:03,087 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:56:03,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873125658] [2022-03-20 14:56:03,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:56:03,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:03,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:56:03,102 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) [2022-03-20 14:56:03,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 14:56:03,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 14:56:03,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:56:03,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 14:56:03,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:56:03,341 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-03-20 14:56:03,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:56:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 27 proven. 14 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-03-20 14:56:03,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:56:03,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739793285] [2022-03-20 14:56:03,511 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:56:03,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873125658] [2022-03-20 14:56:03,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873125658] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:56:03,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:56:03,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-03-20 14:56:03,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:56:03,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1636040569] [2022-03-20 14:56:03,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1636040569] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:56:03,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:56:03,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 14:56:03,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001196404] [2022-03-20 14:56:03,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:56:03,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 14:56:03,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:03,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 14:56:03,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 14:56:03,512 INFO L87 Difference]: Start difference. First operand 164 states and 199 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 14:56:03,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:56:03,720 INFO L93 Difference]: Finished difference Result 178 states and 218 transitions. [2022-03-20 14:56:03,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 14:56:03,720 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 79 [2022-03-20 14:56:03,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:56:03,721 INFO L225 Difference]: With dead ends: 178 [2022-03-20 14:56:03,721 INFO L226 Difference]: Without dead ends: 165 [2022-03-20 14:56:03,722 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-20 14:56:03,722 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 14 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:56:03,722 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 180 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:56:03,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-20 14:56:03,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 145. [2022-03-20 14:56:03,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 92 states have internal predecessors, (96), 36 states have call successors, (36), 21 states have call predecessors, (36), 20 states have return successors, (35), 31 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-20 14:56:03,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 167 transitions. [2022-03-20 14:56:03,739 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 167 transitions. Word has length 79 [2022-03-20 14:56:03,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:56:03,739 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 167 transitions. [2022-03-20 14:56:03,739 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 14:56:03,739 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 167 transitions. [2022-03-20 14:56:03,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 14:56:03,740 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:56:03,740 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:56:03,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 14:56:03,955 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,SelfDestructingSolverStorable12 [2022-03-20 14:56:03,955 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:56:03,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:56:03,956 INFO L85 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 3 times [2022-03-20 14:56:03,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:03,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [74883860] [2022-03-20 14:56:03,956 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:56:03,956 INFO L85 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 4 times [2022-03-20 14:56:03,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:56:03,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270846232] [2022-03-20 14:56:03,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:56:03,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:56:03,962 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:56:03,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125856165] [2022-03-20 14:56:03,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:56:03,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:03,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:56:03,964 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) [2022-03-20 14:56:03,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 14:56:03,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:56:04,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:56:04,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 14:56:04,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:56:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 38 proven. 37 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-20 14:56:04,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:56:04,670 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 40 proven. 26 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-20 14:56:04,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:56:04,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270846232] [2022-03-20 14:56:04,671 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:56:04,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125856165] [2022-03-20 14:56:04,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125856165] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:56:04,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:56:04,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-03-20 14:56:04,672 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:56:04,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [74883860] [2022-03-20 14:56:04,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [74883860] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:56:04,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:56:04,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 14:56:04,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388925211] [2022-03-20 14:56:04,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:56:04,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 14:56:04,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:04,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 14:56:04,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-03-20 14:56:04,688 INFO L87 Difference]: Start difference. First operand 145 states and 167 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 14:56:04,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:56:04,903 INFO L93 Difference]: Finished difference Result 167 states and 195 transitions. [2022-03-20 14:56:04,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 14:56:04,903 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2022-03-20 14:56:04,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:56:04,906 INFO L225 Difference]: With dead ends: 167 [2022-03-20 14:56:04,906 INFO L226 Difference]: Without dead ends: 165 [2022-03-20 14:56:04,906 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-20 14:56:04,906 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:56:04,906 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 163 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:56:04,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-20 14:56:04,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 155. [2022-03-20 14:56:04,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 94 states have (on average 1.0957446808510638) internal successors, (103), 98 states have internal predecessors, (103), 39 states have call successors, (39), 22 states have call predecessors, (39), 21 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-20 14:56:04,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 180 transitions. [2022-03-20 14:56:04,925 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 180 transitions. Word has length 79 [2022-03-20 14:56:04,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:56:04,926 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 180 transitions. [2022-03-20 14:56:04,926 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 14:56:04,926 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 180 transitions. [2022-03-20 14:56:04,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 14:56:04,927 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:56:04,928 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:56:04,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-20 14:56:05,143 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,SelfDestructingSolverStorable13 [2022-03-20 14:56:05,143 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:56:05,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:56:05,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 7 times [2022-03-20 14:56:05,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:05,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [223154651] [2022-03-20 14:56:05,144 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:56:05,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 8 times [2022-03-20 14:56:05,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:56:05,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606293772] [2022-03-20 14:56:05,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:56:05,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:56:05,150 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:56:05,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318263734] [2022-03-20 14:56:05,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:56:05,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:05,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:56:05,157 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) [2022-03-20 14:56:05,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 14:56:05,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:56:05,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:56:05,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 14:56:05,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:56:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 63 proven. 44 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 14:56:07,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:56:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-03-20 14:56:07,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:56:07,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606293772] [2022-03-20 14:56:07,820 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:56:07,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318263734] [2022-03-20 14:56:07,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318263734] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:56:07,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:56:07,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 21 [2022-03-20 14:56:07,820 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:56:07,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [223154651] [2022-03-20 14:56:07,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [223154651] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:56:07,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:56:07,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 14:56:07,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044727547] [2022-03-20 14:56:07,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:56:07,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 14:56:07,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:07,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 14:56:07,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-03-20 14:56:07,821 INFO L87 Difference]: Start difference. First operand 155 states and 180 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-03-20 14:56:09,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:56:09,478 INFO L93 Difference]: Finished difference Result 183 states and 217 transitions. [2022-03-20 14:56:09,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 14:56:09,479 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 92 [2022-03-20 14:56:09,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:56:09,481 INFO L225 Difference]: With dead ends: 183 [2022-03-20 14:56:09,481 INFO L226 Difference]: Without dead ends: 181 [2022-03-20 14:56:09,483 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 162 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-03-20 14:56:09,484 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 24 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 14:56:09,484 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 256 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 430 Invalid, 0 Unknown, 5 Unchecked, 1.6s Time] [2022-03-20 14:56:09,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-03-20 14:56:09,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2022-03-20 14:56:09,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 107 states have (on average 1.102803738317757) internal successors, (118), 112 states have internal predecessors, (118), 48 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (47), 42 states have call predecessors, (47), 47 states have call successors, (47) [2022-03-20 14:56:09,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 213 transitions. [2022-03-20 14:56:09,520 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 213 transitions. Word has length 92 [2022-03-20 14:56:09,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:56:09,521 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 213 transitions. [2022-03-20 14:56:09,521 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-03-20 14:56:09,521 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 213 transitions. [2022-03-20 14:56:09,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 14:56:09,524 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:56:09,524 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:56:09,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 14:56:09,744 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:09,745 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:56:09,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:56:09,745 INFO L85 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 9 times [2022-03-20 14:56:09,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:09,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1722610228] [2022-03-20 14:56:09,746 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:56:09,746 INFO L85 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 10 times [2022-03-20 14:56:09,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:56:09,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591986672] [2022-03-20 14:56:09,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:56:09,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:56:09,770 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:56:09,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443547969] [2022-03-20 14:56:09,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:56:09,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:09,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:56:09,772 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) [2022-03-20 14:56:09,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 14:56:09,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:56:09,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:56:09,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 14:56:09,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:56:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-03-20 14:56:10,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:56:12,277 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:56:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-03-20 14:56:12,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:56:12,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591986672] [2022-03-20 14:56:12,321 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:56:12,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443547969] [2022-03-20 14:56:12,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443547969] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:56:12,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:56:12,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-03-20 14:56:12,321 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:56:12,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1722610228] [2022-03-20 14:56:12,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1722610228] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:56:12,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:56:12,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 14:56:12,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834962689] [2022-03-20 14:56:12,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:56:12,322 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 14:56:12,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:12,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 14:56:12,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-20 14:56:12,322 INFO L87 Difference]: Start difference. First operand 179 states and 213 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-20 14:56:12,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:56:12,888 INFO L93 Difference]: Finished difference Result 208 states and 249 transitions. [2022-03-20 14:56:12,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 14:56:12,889 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2022-03-20 14:56:12,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:56:12,890 INFO L225 Difference]: With dead ends: 208 [2022-03-20 14:56:12,890 INFO L226 Difference]: Without dead ends: 206 [2022-03-20 14:56:12,891 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-03-20 14:56:12,891 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 13 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 14:56:12,891 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 326 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 14:56:12,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-20 14:56:12,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 196. [2022-03-20 14:56:12,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 118 states have (on average 1.1101694915254237) internal successors, (131), 122 states have internal predecessors, (131), 52 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (51), 47 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-20 14:56:12,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 234 transitions. [2022-03-20 14:56:12,943 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 234 transitions. Word has length 92 [2022-03-20 14:56:12,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:56:12,944 INFO L478 AbstractCegarLoop]: Abstraction has 196 states and 234 transitions. [2022-03-20 14:56:12,944 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-20 14:56:12,944 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 234 transitions. [2022-03-20 14:56:12,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 14:56:12,944 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:56:12,945 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:56:12,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 14:56:13,157 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,SelfDestructingSolverStorable15 [2022-03-20 14:56:13,158 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:56:13,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:56:13,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 11 times [2022-03-20 14:56:13,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:13,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1280807903] [2022-03-20 14:56:13,159 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:56:13,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 12 times [2022-03-20 14:56:13,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:56:13,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345054030] [2022-03-20 14:56:13,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:56:13,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:56:13,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:56:13,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735094527] [2022-03-20 14:56:13,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:56:13,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:13,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:56:13,179 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) [2022-03-20 14:56:13,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 14:56:13,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 14:56:13,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:56:13,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 14:56:13,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:56:13,514 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:56:13,515 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:56:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 70 proven. 11 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-20 14:56:14,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:56:16,625 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:57:36,565 WARN L855 $PredicateComparison]: unable to prove that (forall ((v_main_~p~0_BEFORE_CALL_129 Int) (v_main_~s~0_BEFORE_CALL_125 Int) (v_main_~q~0_BEFORE_CALL_125 Int) (v_main_~r~0_BEFORE_CALL_126 Int)) (or (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_125) v_main_~r~0_BEFORE_CALL_126) v_main_~q~0_BEFORE_CALL_125) 1) (* (+ v_main_~p~0_BEFORE_CALL_129 (* (- 1) v_main_~q~0_BEFORE_CALL_125)) v_main_~s~0_BEFORE_CALL_125))) (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_126 v_main_~q~0_BEFORE_CALL_125) 1))) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (= .cse0 0) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_129) 0)))))) is different from true [2022-03-20 14:58:42,221 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~p~0_BEFORE_CALL_129 Int) (v_main_~s~0_BEFORE_CALL_125 Int) (v_main_~q~0_BEFORE_CALL_125 Int) (v_main_~r~0_BEFORE_CALL_126 Int)) (or (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_125) v_main_~r~0_BEFORE_CALL_126) v_main_~q~0_BEFORE_CALL_125) 1) (* (+ v_main_~p~0_BEFORE_CALL_129 (* (- 1) v_main_~q~0_BEFORE_CALL_125)) v_main_~s~0_BEFORE_CALL_125))) (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_126 v_main_~q~0_BEFORE_CALL_125) 1))) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (= .cse0 0) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_129) 0)))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-03-20 14:59:00,262 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~p~0_BEFORE_CALL_129 Int) (v_main_~s~0_BEFORE_CALL_125 Int) (v_main_~q~0_BEFORE_CALL_125 Int) (v_main_~r~0_BEFORE_CALL_126 Int)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_126 v_main_~q~0_BEFORE_CALL_125) 1))) (or (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_125) v_main_~r~0_BEFORE_CALL_126) v_main_~q~0_BEFORE_CALL_125) 1) (* (+ v_main_~p~0_BEFORE_CALL_129 (* (- 1) v_main_~q~0_BEFORE_CALL_125)) v_main_~s~0_BEFORE_CALL_125))) (= .cse0 0) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_129) 0)))) (not (= |c___VERIFIER_assert_#in~cond| 1))) is different from true [2022-03-20 14:59:10,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:59:10,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345054030] [2022-03-20 14:59:10,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:59:10,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735094527] [2022-03-20 14:59:10,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735094527] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 14:59:10,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 14:59:10,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 14:59:10,148 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:59:10,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1280807903] [2022-03-20 14:59:10,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1280807903] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:59:10,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:59:10,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 14:59:10,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794582650] [2022-03-20 14:59:10,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:59:10,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 14:59:10,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:10,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 14:59:10,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=189, Unknown=8, NotChecked=90, Total=342 [2022-03-20 14:59:10,149 INFO L87 Difference]: Start difference. First operand 196 states and 234 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-20 14:59:13,767 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 [] [2022-03-20 14:59:41,943 WARN L232 SmtUtils]: Spent 28.14s on a formula simplification. DAG size of input: 47 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 14:59:44,951 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 [] [2022-03-20 14:59:45,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:59:45,050 INFO L93 Difference]: Finished difference Result 224 states and 272 transitions. [2022-03-20 14:59:45,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 14:59:45,050 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 92 [2022-03-20 14:59:45,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:59:45,051 INFO L225 Difference]: With dead ends: 224 [2022-03-20 14:59:45,051 INFO L226 Difference]: Without dead ends: 222 [2022-03-20 14:59:45,052 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 51.2s TimeCoverageRelationStatistics Valid=76, Invalid=270, Unknown=8, NotChecked=108, Total=462 [2022-03-20 14:59:45,052 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:59:45,052 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 199 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 170 Invalid, 2 Unknown, 0 Unchecked, 5.1s Time] [2022-03-20 14:59:45,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-03-20 14:59:45,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2022-03-20 14:59:45,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 131 states have (on average 1.1145038167938932) internal successors, (146), 136 states have internal predecessors, (146), 61 states have call successors, (61), 28 states have call predecessors, (61), 27 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2022-03-20 14:59:45,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 267 transitions. [2022-03-20 14:59:45,098 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 267 transitions. Word has length 92 [2022-03-20 14:59:45,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:59:45,098 INFO L478 AbstractCegarLoop]: Abstraction has 220 states and 267 transitions. [2022-03-20 14:59:45,098 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-20 14:59:45,098 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 267 transitions. [2022-03-20 14:59:45,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 14:59:45,099 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:59:45,099 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:59:45,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 14:59:45,315 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,SelfDestructingSolverStorable16 [2022-03-20 14:59:45,315 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:59:45,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:59:45,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 13 times [2022-03-20 14:59:45,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:45,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1157259396] [2022-03-20 14:59:45,316 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:59:45,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 14 times [2022-03-20 14:59:45,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:59:45,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4429452] [2022-03-20 14:59:45,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:59:45,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:59:45,321 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:59:45,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735152648] [2022-03-20 14:59:45,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:59:45,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:45,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:59:45,326 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) [2022-03-20 14:59:45,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 14:59:45,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:59:45,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:59:45,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 14:59:45,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:59:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 71 proven. 35 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-03-20 14:59:45,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:59:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 87 proven. 5 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-20 14:59:46,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:59:46,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4429452] [2022-03-20 14:59:46,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:59:46,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735152648] [2022-03-20 14:59:46,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735152648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:59:46,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:59:46,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-03-20 14:59:46,049 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:59:46,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1157259396] [2022-03-20 14:59:46,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1157259396] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:59:46,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:59:46,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 14:59:46,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566894285] [2022-03-20 14:59:46,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:59:46,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 14:59:46,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:46,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 14:59:46,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-20 14:59:46,050 INFO L87 Difference]: Start difference. First operand 220 states and 267 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 14:59:46,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:59:46,349 INFO L93 Difference]: Finished difference Result 258 states and 307 transitions. [2022-03-20 14:59:46,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 14:59:46,349 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 97 [2022-03-20 14:59:46,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:59:46,351 INFO L225 Difference]: With dead ends: 258 [2022-03-20 14:59:46,352 INFO L226 Difference]: Without dead ends: 256 [2022-03-20 14:59:46,353 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-20 14:59:46,354 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 17 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:59:46,354 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 279 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:59:46,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-03-20 14:59:46,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 242. [2022-03-20 14:59:46,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 147 states have (on average 1.1020408163265305) internal successors, (162), 153 states have internal predecessors, (162), 62 states have call successors, (62), 33 states have call predecessors, (62), 32 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2022-03-20 14:59:46,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 285 transitions. [2022-03-20 14:59:46,404 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 285 transitions. Word has length 97 [2022-03-20 14:59:46,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:59:46,405 INFO L478 AbstractCegarLoop]: Abstraction has 242 states and 285 transitions. [2022-03-20 14:59:46,405 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 14:59:46,405 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 285 transitions. [2022-03-20 14:59:46,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 14:59:46,406 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:59:46,406 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:59:46,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 14:59:46,623 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,SelfDestructingSolverStorable17 [2022-03-20 14:59:46,623 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:59:46,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:59:46,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1451182689, now seen corresponding path program 15 times [2022-03-20 14:59:46,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:46,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1745495644] [2022-03-20 14:59:46,624 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:59:46,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1451182689, now seen corresponding path program 16 times [2022-03-20 14:59:46,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:59:46,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328479743] [2022-03-20 14:59:46,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:59:46,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:59:46,631 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:59:46,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989938322] [2022-03-20 14:59:46,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:59:46,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:46,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:59:46,633 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) [2022-03-20 14:59:46,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 14:59:46,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:59:46,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:59:46,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 14:59:46,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:59:47,949 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 77 proven. 41 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-03-20 14:59:47,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:59:48,277 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 87 proven. 5 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-20 14:59:48,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:59:48,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328479743] [2022-03-20 14:59:48,278 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:59:48,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989938322] [2022-03-20 14:59:48,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989938322] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:59:48,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:59:48,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 23 [2022-03-20 14:59:48,279 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:59:48,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1745495644] [2022-03-20 14:59:48,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1745495644] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:59:48,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:59:48,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 14:59:48,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854621666] [2022-03-20 14:59:48,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:59:48,279 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 14:59:48,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:48,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 14:59:48,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-03-20 14:59:48,280 INFO L87 Difference]: Start difference. First operand 242 states and 285 transitions. Second operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 14:59:48,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:59:48,791 INFO L93 Difference]: Finished difference Result 297 states and 347 transitions. [2022-03-20 14:59:48,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 14:59:48,791 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) Word has length 97 [2022-03-20 14:59:48,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:59:48,792 INFO L225 Difference]: With dead ends: 297 [2022-03-20 14:59:48,792 INFO L226 Difference]: Without dead ends: 242 [2022-03-20 14:59:48,794 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-03-20 14:59:48,794 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 14:59:48,795 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 301 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 14:59:48,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-03-20 14:59:48,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2022-03-20 14:59:48,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 147 states have (on average 1.0952380952380953) internal successors, (161), 153 states have internal predecessors, (161), 62 states have call successors, (62), 33 states have call predecessors, (62), 32 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2022-03-20 14:59:48,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 284 transitions. [2022-03-20 14:59:48,835 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 284 transitions. Word has length 97 [2022-03-20 14:59:48,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:59:48,835 INFO L478 AbstractCegarLoop]: Abstraction has 242 states and 284 transitions. [2022-03-20 14:59:48,835 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 14:59:48,835 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 284 transitions. [2022-03-20 14:59:48,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 14:59:48,836 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:59:48,836 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:59:48,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-20 14:59:49,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:49,051 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:59:49,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:59:49,052 INFO L85 PathProgramCache]: Analyzing trace with hash -792800609, now seen corresponding path program 5 times [2022-03-20 14:59:49,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:49,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1590309535] [2022-03-20 14:59:49,052 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:59:49,052 INFO L85 PathProgramCache]: Analyzing trace with hash -792800609, now seen corresponding path program 6 times [2022-03-20 14:59:49,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:59:49,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903589578] [2022-03-20 14:59:49,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:59:49,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:59:49,058 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:59:49,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315545201] [2022-03-20 14:59:49,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:59:49,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:49,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:59:49,059 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) [2022-03-20 14:59:49,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 14:59:49,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 14:59:49,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:59:49,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 14:59:49,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:59:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 104 proven. 6 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-03-20 14:59:49,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:59:49,555 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 107 proven. 3 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-03-20 14:59:49,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:59:49,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903589578] [2022-03-20 14:59:49,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:59:49,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315545201] [2022-03-20 14:59:49,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315545201] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:59:49,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:59:49,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-20 14:59:49,556 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:59:49,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1590309535] [2022-03-20 14:59:49,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1590309535] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:59:49,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:59:49,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 14:59:49,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059844876] [2022-03-20 14:59:49,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:59:49,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 14:59:49,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:49,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 14:59:49,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-20 14:59:49,557 INFO L87 Difference]: Start difference. First operand 242 states and 284 transitions. Second operand has 10 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 14:59:49,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:59:49,693 INFO L93 Difference]: Finished difference Result 261 states and 307 transitions. [2022-03-20 14:59:49,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 14:59:49,694 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2022-03-20 14:59:49,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:59:49,695 INFO L225 Difference]: With dead ends: 261 [2022-03-20 14:59:49,695 INFO L226 Difference]: Without dead ends: 259 [2022-03-20 14:59:49,695 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-20 14:59:49,695 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:59:49,695 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 137 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:59:49,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-20 14:59:49,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 226. [2022-03-20 14:59:49,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 139 states have (on average 1.0935251798561152) internal successors, (152), 143 states have internal predecessors, (152), 55 states have call successors, (55), 32 states have call predecessors, (55), 31 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-20 14:59:49,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 261 transitions. [2022-03-20 14:59:49,734 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 261 transitions. Word has length 97 [2022-03-20 14:59:49,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:59:49,734 INFO L478 AbstractCegarLoop]: Abstraction has 226 states and 261 transitions. [2022-03-20 14:59:49,734 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 14:59:49,734 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 261 transitions. [2022-03-20 14:59:49,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 14:59:49,735 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:59:49,735 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:59:49,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 14:59:49,936 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:49,937 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:59:49,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:59:49,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1750450403, now seen corresponding path program 17 times [2022-03-20 14:59:49,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:49,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [655803420] [2022-03-20 14:59:49,938 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:59:49,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1750450403, now seen corresponding path program 18 times [2022-03-20 14:59:49,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:59:49,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674192962] [2022-03-20 14:59:49,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:59:49,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:59:49,943 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:59:49,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322902324] [2022-03-20 14:59:49,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:59:49,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:49,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:59:49,944 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) [2022-03-20 14:59:49,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 14:59:50,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 14:59:50,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:59:50,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 14:59:50,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:00:05,256 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:00:05,588 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 91 proven. 53 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-03-20 15:00:05,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:00:11,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:00:11,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674192962] [2022-03-20 15:00:11,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:00:11,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322902324] [2022-03-20 15:00:11,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322902324] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:00:11,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:00:11,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 15:00:11,681 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:00:11,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [655803420] [2022-03-20 15:00:11,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [655803420] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:00:11,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:00:11,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 15:00:11,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748841009] [2022-03-20 15:00:11,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:00:11,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 15:00:11,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:00:11,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 15:00:11,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=426, Unknown=1, NotChecked=0, Total=506 [2022-03-20 15:00:11,682 INFO L87 Difference]: Start difference. First operand 226 states and 261 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-20 15:00:14,108 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:00:19,948 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:00:24,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:00:24,808 INFO L93 Difference]: Finished difference Result 271 states and 316 transitions. [2022-03-20 15:00:24,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 15:00:24,809 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 110 [2022-03-20 15:00:24,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:00:24,812 INFO L225 Difference]: With dead ends: 271 [2022-03-20 15:00:24,812 INFO L226 Difference]: Without dead ends: 269 [2022-03-20 15:00:24,813 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=105, Invalid=596, Unknown=1, NotChecked=0, Total=702 [2022-03-20 15:00:24,814 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 27 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-03-20 15:00:24,814 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 246 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2022-03-20 15:00:24,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-03-20 15:00:24,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 237. [2022-03-20 15:00:24,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 147 states have (on average 1.0952380952380953) internal successors, (161), 150 states have internal predecessors, (161), 56 states have call successors, (56), 34 states have call predecessors, (56), 33 states have return successors, (55), 52 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 15:00:24,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 272 transitions. [2022-03-20 15:00:24,872 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 272 transitions. Word has length 110 [2022-03-20 15:00:24,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:00:24,873 INFO L478 AbstractCegarLoop]: Abstraction has 237 states and 272 transitions. [2022-03-20 15:00:24,873 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-20 15:00:24,873 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 272 transitions. [2022-03-20 15:00:24,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 15:00:24,874 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:00:24,874 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:00:24,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 15:00:25,080 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-20 15:00:25,080 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:00:25,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:00:25,080 INFO L85 PathProgramCache]: Analyzing trace with hash 805225117, now seen corresponding path program 19 times [2022-03-20 15:00:25,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:00:25,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1798913739] [2022-03-20 15:00:25,081 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:00:25,081 INFO L85 PathProgramCache]: Analyzing trace with hash 805225117, now seen corresponding path program 20 times [2022-03-20 15:00:25,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:00:25,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366228778] [2022-03-20 15:00:25,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:00:25,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:00:25,090 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:00:25,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [874150924] [2022-03-20 15:00:25,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:00:25,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:00:25,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:00:25,095 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:00:25,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 15:00:25,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:00:25,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:00:25,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 15:00:25,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:00:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 107 proven. 22 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2022-03-20 15:00:25,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:00:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 38 proven. 45 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-03-20 15:00:25,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:00:25,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366228778] [2022-03-20 15:00:25,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:00:25,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874150924] [2022-03-20 15:00:25,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874150924] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:00:25,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:00:25,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-03-20 15:00:25,674 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:00:25,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1798913739] [2022-03-20 15:00:25,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1798913739] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:00:25,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:00:25,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 15:00:25,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675920199] [2022-03-20 15:00:25,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:00:25,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 15:00:25,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:00:25,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 15:00:25,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-20 15:00:25,675 INFO L87 Difference]: Start difference. First operand 237 states and 272 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 15:00:25,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:00:25,874 INFO L93 Difference]: Finished difference Result 319 states and 393 transitions. [2022-03-20 15:00:25,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 15:00:25,874 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 110 [2022-03-20 15:00:25,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:00:25,876 INFO L225 Difference]: With dead ends: 319 [2022-03-20 15:00:25,876 INFO L226 Difference]: Without dead ends: 291 [2022-03-20 15:00:25,877 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:00:25,877 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 14 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:00:25,877 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 234 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:00:25,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-03-20 15:00:25,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2022-03-20 15:00:25,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 174 states have (on average 1.1206896551724137) internal successors, (195), 177 states have internal predecessors, (195), 83 states have call successors, (83), 34 states have call predecessors, (83), 33 states have return successors, (82), 79 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-20 15:00:25,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 360 transitions. [2022-03-20 15:00:25,967 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 360 transitions. Word has length 110 [2022-03-20 15:00:25,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:00:25,967 INFO L478 AbstractCegarLoop]: Abstraction has 291 states and 360 transitions. [2022-03-20 15:00:25,967 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 15:00:25,967 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 360 transitions. [2022-03-20 15:00:25,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 15:00:25,968 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:00:25,968 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:00:25,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-20 15:00:26,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 15:00:26,171 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:00:26,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:00:26,172 INFO L85 PathProgramCache]: Analyzing trace with hash -2103538785, now seen corresponding path program 21 times [2022-03-20 15:00:26,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:00:26,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1532019954] [2022-03-20 15:00:26,172 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:00:26,172 INFO L85 PathProgramCache]: Analyzing trace with hash -2103538785, now seen corresponding path program 22 times [2022-03-20 15:00:26,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:00:26,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218348808] [2022-03-20 15:00:26,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:00:26,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:00:26,177 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:00:26,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816760361] [2022-03-20 15:00:26,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:00:26,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:00:26,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:00:26,179 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) [2022-03-20 15:00:26,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 15:00:26,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:00:26,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:00:26,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 15:00:26,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:00:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 90 proven. 39 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2022-03-20 15:00:26,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:00:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 38 proven. 45 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-03-20 15:00:26,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:00:26,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218348808] [2022-03-20 15:00:26,669 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:00:26,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816760361] [2022-03-20 15:00:26,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816760361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:00:26,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:00:26,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-03-20 15:00:26,669 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:00:26,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1532019954] [2022-03-20 15:00:26,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1532019954] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:00:26,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:00:26,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 15:00:26,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137473539] [2022-03-20 15:00:26,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:00:26,670 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 15:00:26,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:00:26,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 15:00:26,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-20 15:00:26,670 INFO L87 Difference]: Start difference. First operand 291 states and 360 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 15:00:26,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:00:26,887 INFO L93 Difference]: Finished difference Result 355 states and 450 transitions. [2022-03-20 15:00:26,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 15:00:26,888 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 110 [2022-03-20 15:00:26,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:00:26,889 INFO L225 Difference]: With dead ends: 355 [2022-03-20 15:00:26,889 INFO L226 Difference]: Without dead ends: 287 [2022-03-20 15:00:26,890 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-03-20 15:00:26,891 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 14 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:00:26,891 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 302 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:00:26,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-20 15:00:26,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 285. [2022-03-20 15:00:26,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 169 states have (on average 1.106508875739645) internal successors, (187), 173 states have internal predecessors, (187), 83 states have call successors, (83), 33 states have call predecessors, (83), 32 states have return successors, (82), 78 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-20 15:00:26,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 352 transitions. [2022-03-20 15:00:26,968 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 352 transitions. Word has length 110 [2022-03-20 15:00:26,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:00:26,968 INFO L478 AbstractCegarLoop]: Abstraction has 285 states and 352 transitions. [2022-03-20 15:00:26,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 15:00:26,969 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 352 transitions. [2022-03-20 15:00:26,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 15:00:26,969 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:00:26,969 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:00:26,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 15:00:27,182 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:00:27,183 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:00:27,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:00:27,183 INFO L85 PathProgramCache]: Analyzing trace with hash -527866339, now seen corresponding path program 23 times [2022-03-20 15:00:27,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:00:27,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1321615921] [2022-03-20 15:00:27,184 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:00:27,184 INFO L85 PathProgramCache]: Analyzing trace with hash -527866339, now seen corresponding path program 24 times [2022-03-20 15:00:27,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:00:27,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723677475] [2022-03-20 15:00:27,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:00:27,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:00:27,194 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:00:27,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473844714] [2022-03-20 15:00:27,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:00:27,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:00:27,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:00:27,195 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) [2022-03-20 15:00:27,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 15:00:27,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 15:00:27,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:00:27,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-20 15:00:27,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:00:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 115 proven. 48 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-20 15:00:29,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:00:29,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:00:29,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723677475] [2022-03-20 15:00:29,894 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:00:29,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473844714] [2022-03-20 15:00:29,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473844714] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:00:29,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:00:29,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-20 15:00:29,894 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:00:29,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1321615921] [2022-03-20 15:00:29,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1321615921] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:00:29,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:00:29,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 15:00:29,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443792358] [2022-03-20 15:00:29,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:00:29,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 15:00:29,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:00:29,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 15:00:29,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-03-20 15:00:29,898 INFO L87 Difference]: Start difference. First operand 285 states and 352 transitions. Second operand has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 10 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-03-20 15:00:31,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:00:31,237 INFO L93 Difference]: Finished difference Result 321 states and 396 transitions. [2022-03-20 15:00:31,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 15:00:31,246 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 10 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) Word has length 110 [2022-03-20 15:00:31,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:00:31,248 INFO L225 Difference]: With dead ends: 321 [2022-03-20 15:00:31,248 INFO L226 Difference]: Without dead ends: 319 [2022-03-20 15:00:31,248 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2022-03-20 15:00:31,248 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 37 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:00:31,249 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 192 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 261 Invalid, 0 Unknown, 38 Unchecked, 0.3s Time] [2022-03-20 15:00:31,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-03-20 15:00:31,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 299. [2022-03-20 15:00:31,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 178 states have (on average 1.1067415730337078) internal successors, (197), 182 states have internal predecessors, (197), 86 states have call successors, (86), 35 states have call predecessors, (86), 34 states have return successors, (85), 81 states have call predecessors, (85), 85 states have call successors, (85) [2022-03-20 15:00:31,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 368 transitions. [2022-03-20 15:00:31,333 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 368 transitions. Word has length 110 [2022-03-20 15:00:31,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:00:31,333 INFO L478 AbstractCegarLoop]: Abstraction has 299 states and 368 transitions. [2022-03-20 15:00:31,333 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 10 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-03-20 15:00:31,333 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 368 transitions. [2022-03-20 15:00:31,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 15:00:31,334 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:00:31,340 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:00:31,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-20 15:00:31,545 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:00:31,546 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:00:31,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:00:31,546 INFO L85 PathProgramCache]: Analyzing trace with hash -880954721, now seen corresponding path program 25 times [2022-03-20 15:00:31,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:00:31,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [649428209] [2022-03-20 15:00:31,547 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:00:31,547 INFO L85 PathProgramCache]: Analyzing trace with hash -880954721, now seen corresponding path program 26 times [2022-03-20 15:00:31,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:00:31,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258728458] [2022-03-20 15:00:31,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:00:31,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:00:31,552 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:00:31,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [266127580] [2022-03-20 15:00:31,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:00:31,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:00:31,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:00:31,553 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) [2022-03-20 15:00:31,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 15:00:31,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:00:31,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:00:31,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 15:00:31,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:00:31,787 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 98 proven. 31 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2022-03-20 15:00:31,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:00:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 41 proven. 42 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-03-20 15:00:32,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:00:32,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258728458] [2022-03-20 15:00:32,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:00:32,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266127580] [2022-03-20 15:00:32,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266127580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:00:32,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:00:32,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-03-20 15:00:32,083 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:00:32,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [649428209] [2022-03-20 15:00:32,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [649428209] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:00:32,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:00:32,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 15:00:32,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290029581] [2022-03-20 15:00:32,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:00:32,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 15:00:32,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:00:32,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 15:00:32,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-20 15:00:32,084 INFO L87 Difference]: Start difference. First operand 299 states and 368 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 15:00:32,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:00:32,398 INFO L93 Difference]: Finished difference Result 453 states and 601 transitions. [2022-03-20 15:00:32,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 15:00:32,404 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 110 [2022-03-20 15:00:32,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:00:32,406 INFO L225 Difference]: With dead ends: 453 [2022-03-20 15:00:32,407 INFO L226 Difference]: Without dead ends: 415 [2022-03-20 15:00:32,410 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2022-03-20 15:00:32,411 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 17 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:00:32,411 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 303 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:00:32,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-03-20 15:00:32,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 365. [2022-03-20 15:00:32,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 211 states have (on average 1.1374407582938388) internal successors, (240), 215 states have internal predecessors, (240), 119 states have call successors, (119), 35 states have call predecessors, (119), 34 states have return successors, (118), 114 states have call predecessors, (118), 118 states have call successors, (118) [2022-03-20 15:00:32,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 477 transitions. [2022-03-20 15:00:32,533 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 477 transitions. Word has length 110 [2022-03-20 15:00:32,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:00:32,533 INFO L478 AbstractCegarLoop]: Abstraction has 365 states and 477 transitions. [2022-03-20 15:00:32,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 15:00:32,533 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 477 transitions. [2022-03-20 15:00:32,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 15:00:32,534 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:00:32,534 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:00:32,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 15:00:32,750 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 15:00:32,750 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:00:32,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:00:32,751 INFO L85 PathProgramCache]: Analyzing trace with hash 769627864, now seen corresponding path program 27 times [2022-03-20 15:00:32,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:00:32,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1579676136] [2022-03-20 15:00:32,751 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:00:32,751 INFO L85 PathProgramCache]: Analyzing trace with hash 769627864, now seen corresponding path program 28 times [2022-03-20 15:00:32,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:00:32,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475420536] [2022-03-20 15:00:32,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:00:32,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:00:32,768 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:00:32,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65631589] [2022-03-20 15:00:32,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:00:32,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:00:32,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:00:32,777 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) [2022-03-20 15:00:32,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 15:00:32,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:00:32,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:00:32,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 15:00:32,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:00:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 148 proven. 33 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-03-20 15:00:33,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:00:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 44 proven. 45 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-03-20 15:00:33,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:00:33,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475420536] [2022-03-20 15:00:33,303 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:00:33,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65631589] [2022-03-20 15:00:33,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65631589] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:00:33,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:00:33,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-03-20 15:00:33,303 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:00:33,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1579676136] [2022-03-20 15:00:33,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1579676136] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:00:33,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:00:33,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 15:00:33,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822320113] [2022-03-20 15:00:33,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:00:33,305 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 15:00:33,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:00:33,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 15:00:33,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-20 15:00:33,306 INFO L87 Difference]: Start difference. First operand 365 states and 477 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 15:00:33,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:00:33,559 INFO L93 Difference]: Finished difference Result 415 states and 537 transitions. [2022-03-20 15:00:33,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 15:00:33,560 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 115 [2022-03-20 15:00:33,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:00:33,561 INFO L225 Difference]: With dead ends: 415 [2022-03-20 15:00:33,561 INFO L226 Difference]: Without dead ends: 337 [2022-03-20 15:00:33,562 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:00:33,562 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:00:33,563 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 260 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:00:33,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-03-20 15:00:33,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 307. [2022-03-20 15:00:33,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 182 states have (on average 1.098901098901099) internal successors, (200), 187 states have internal predecessors, (200), 90 states have call successors, (90), 35 states have call predecessors, (90), 34 states have return successors, (89), 84 states have call predecessors, (89), 89 states have call successors, (89) [2022-03-20 15:00:33,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 379 transitions. [2022-03-20 15:00:33,652 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 379 transitions. Word has length 115 [2022-03-20 15:00:33,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:00:33,652 INFO L478 AbstractCegarLoop]: Abstraction has 307 states and 379 transitions. [2022-03-20 15:00:33,652 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 15:00:33,652 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 379 transitions. [2022-03-20 15:00:33,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 15:00:33,653 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:00:33,653 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:00:33,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 15:00:33,867 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,SelfDestructingSolverStorable25 [2022-03-20 15:00:33,868 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:00:33,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:00:33,868 INFO L85 PathProgramCache]: Analyzing trace with hash 256983896, now seen corresponding path program 29 times [2022-03-20 15:00:33,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:00:33,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [169727020] [2022-03-20 15:00:33,868 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:00:33,868 INFO L85 PathProgramCache]: Analyzing trace with hash 256983896, now seen corresponding path program 30 times [2022-03-20 15:00:33,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:00:33,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581657660] [2022-03-20 15:00:33,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:00:33,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:00:33,874 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:00:33,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427658672] [2022-03-20 15:00:33,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:00:33,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:00:33,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:00:33,891 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) [2022-03-20 15:00:33,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 15:00:34,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 15:00:34,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:00:34,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 15:00:34,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:01:00,315 WARN L232 SmtUtils]: Spent 7.21s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 15:01:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 130 proven. 55 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-03-20 15:01:24,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:01:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 146 proven. 3 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-03-20 15:01:39,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:01:39,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581657660] [2022-03-20 15:01:39,292 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:01:39,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427658672] [2022-03-20 15:01:39,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427658672] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:01:39,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:01:39,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 25 [2022-03-20 15:01:39,293 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:01:39,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [169727020] [2022-03-20 15:01:39,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [169727020] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:01:39,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:01:39,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 15:01:39,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563957033] [2022-03-20 15:01:39,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:01:39,293 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 15:01:39,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:01:39,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 15:01:39,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=478, Unknown=1, NotChecked=0, Total=600 [2022-03-20 15:01:39,294 INFO L87 Difference]: Start difference. First operand 307 states and 379 transitions. Second operand has 18 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 15:01:47,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:01:47,890 INFO L93 Difference]: Finished difference Result 423 states and 551 transitions. [2022-03-20 15:01:47,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 15:01:47,890 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) Word has length 115 [2022-03-20 15:01:47,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:01:47,892 INFO L225 Difference]: With dead ends: 423 [2022-03-20 15:01:47,892 INFO L226 Difference]: Without dead ends: 421 [2022-03-20 15:01:47,892 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 39.1s TimeCoverageRelationStatistics Valid=150, Invalid=661, Unknown=1, NotChecked=0, Total=812 [2022-03-20 15:01:47,893 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 34 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:01:47,893 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 281 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 420 Invalid, 0 Unknown, 23 Unchecked, 1.0s Time] [2022-03-20 15:01:47,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-03-20 15:01:48,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 335. [2022-03-20 15:01:48,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 197 states have (on average 1.101522842639594) internal successors, (217), 202 states have internal predecessors, (217), 102 states have call successors, (102), 36 states have call predecessors, (102), 35 states have return successors, (101), 96 states have call predecessors, (101), 101 states have call successors, (101) [2022-03-20 15:01:48,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 420 transitions. [2022-03-20 15:01:48,009 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 420 transitions. Word has length 115 [2022-03-20 15:01:48,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:01:48,009 INFO L478 AbstractCegarLoop]: Abstraction has 335 states and 420 transitions. [2022-03-20 15:01:48,009 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 15:01:48,009 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 420 transitions. [2022-03-20 15:01:48,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 15:01:48,010 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:01:48,010 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:01:48,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 15:01:48,214 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,SelfDestructingSolverStorable26 [2022-03-20 15:01:48,215 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:01:48,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:01:48,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1986999402, now seen corresponding path program 31 times [2022-03-20 15:01:48,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:01:48,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1114266177] [2022-03-20 15:01:48,215 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:01:48,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1986999402, now seen corresponding path program 32 times [2022-03-20 15:01:48,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:01:48,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207540541] [2022-03-20 15:01:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:01:48,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:01:48,220 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:01:48,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105986362] [2022-03-20 15:01:48,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:01:48,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:01:48,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:01:48,222 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) [2022-03-20 15:01:48,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 15:01:48,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:01:48,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:01:48,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-20 15:01:48,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:01:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 103 proven. 85 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-03-20 15:01:49,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:01:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-03-20 15:01:49,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:01:49,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207540541] [2022-03-20 15:01:49,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:01:49,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105986362] [2022-03-20 15:01:49,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105986362] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:01:49,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:01:49,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2022-03-20 15:01:49,393 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:01:49,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1114266177] [2022-03-20 15:01:49,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1114266177] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:01:49,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:01:49,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 15:01:49,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695990404] [2022-03-20 15:01:49,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:01:49,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 15:01:49,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:01:49,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 15:01:49,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-03-20 15:01:49,394 INFO L87 Difference]: Start difference. First operand 335 states and 420 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 15:01:49,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:01:49,811 INFO L93 Difference]: Finished difference Result 420 states and 525 transitions. [2022-03-20 15:01:49,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 15:01:49,811 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 115 [2022-03-20 15:01:49,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:01:49,812 INFO L225 Difference]: With dead ends: 420 [2022-03-20 15:01:49,813 INFO L226 Difference]: Without dead ends: 309 [2022-03-20 15:01:49,813 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:01:49,814 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 24 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:01:49,815 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 294 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 15:01:49,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-03-20 15:01:49,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2022-03-20 15:01:49,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 184 states have (on average 1.0923913043478262) internal successors, (201), 188 states have internal predecessors, (201), 90 states have call successors, (90), 35 states have call predecessors, (90), 34 states have return successors, (89), 85 states have call predecessors, (89), 89 states have call successors, (89) [2022-03-20 15:01:49,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 380 transitions. [2022-03-20 15:01:49,921 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 380 transitions. Word has length 115 [2022-03-20 15:01:49,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:01:49,922 INFO L478 AbstractCegarLoop]: Abstraction has 309 states and 380 transitions. [2022-03-20 15:01:49,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 15:01:49,922 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 380 transitions. [2022-03-20 15:01:49,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 15:01:49,922 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:01:49,923 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:01:49,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 15:01:50,135 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,SelfDestructingSolverStorable27 [2022-03-20 15:01:50,135 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:01:50,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:01:50,136 INFO L85 PathProgramCache]: Analyzing trace with hash 627101656, now seen corresponding path program 33 times [2022-03-20 15:01:50,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:01:50,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1753776385] [2022-03-20 15:01:50,136 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:01:50,136 INFO L85 PathProgramCache]: Analyzing trace with hash 627101656, now seen corresponding path program 34 times [2022-03-20 15:01:50,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:01:50,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053774020] [2022-03-20 15:01:50,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:01:50,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:01:50,141 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:01:50,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336436035] [2022-03-20 15:01:50,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:01:50,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:01:50,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:01:50,146 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) [2022-03-20 15:01:50,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 15:01:50,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:01:50,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:01:50,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 15:01:50,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:01:50,383 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 145 proven. 36 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-03-20 15:01:50,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:01:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 47 proven. 42 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-03-20 15:01:50,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:01:50,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053774020] [2022-03-20 15:01:50,624 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:01:50,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336436035] [2022-03-20 15:01:50,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336436035] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:01:50,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:01:50,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-03-20 15:01:50,625 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:01:50,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1753776385] [2022-03-20 15:01:50,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1753776385] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:01:50,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:01:50,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 15:01:50,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978320407] [2022-03-20 15:01:50,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:01:50,625 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 15:01:50,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:01:50,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 15:01:50,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-20 15:01:50,625 INFO L87 Difference]: Start difference. First operand 309 states and 380 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 15:01:50,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:01:50,873 INFO L93 Difference]: Finished difference Result 371 states and 464 transitions. [2022-03-20 15:01:50,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 15:01:50,874 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 115 [2022-03-20 15:01:50,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:01:50,875 INFO L225 Difference]: With dead ends: 371 [2022-03-20 15:01:50,875 INFO L226 Difference]: Without dead ends: 310 [2022-03-20 15:01:50,875 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-03-20 15:01:50,876 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 14 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:01:50,876 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 302 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:01:50,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-03-20 15:01:50,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 296. [2022-03-20 15:01:50,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 174 states have (on average 1.0919540229885059) internal successors, (190), 177 states have internal predecessors, (190), 91 states have call successors, (91), 31 states have call predecessors, (91), 30 states have return successors, (90), 87 states have call predecessors, (90), 90 states have call successors, (90) [2022-03-20 15:01:50,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 371 transitions. [2022-03-20 15:01:50,973 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 371 transitions. Word has length 115 [2022-03-20 15:01:50,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:01:50,973 INFO L478 AbstractCegarLoop]: Abstraction has 296 states and 371 transitions. [2022-03-20 15:01:50,974 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 15:01:50,974 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 371 transitions. [2022-03-20 15:01:50,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 15:01:50,975 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:01:50,975 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:01:50,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 15:01:51,188 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,SelfDestructingSolverStorable28 [2022-03-20 15:01:51,188 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:01:51,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:01:51,188 INFO L85 PathProgramCache]: Analyzing trace with hash -2129525610, now seen corresponding path program 35 times [2022-03-20 15:01:51,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:01:51,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [656401558] [2022-03-20 15:01:51,189 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:01:51,189 INFO L85 PathProgramCache]: Analyzing trace with hash -2129525610, now seen corresponding path program 36 times [2022-03-20 15:01:51,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:01:51,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703684640] [2022-03-20 15:01:51,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:01:51,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:01:51,194 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:01:51,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819198239] [2022-03-20 15:01:51,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:01:51,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:01:51,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:01:51,195 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) [2022-03-20 15:01:51,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 15:01:51,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 15:01:51,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:01:51,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 15:01:51,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:01:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 95 proven. 39 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2022-03-20 15:01:58,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:01:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-03-20 15:01:58,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:01:58,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703684640] [2022-03-20 15:01:58,387 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:01:58,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819198239] [2022-03-20 15:01:58,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819198239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:01:58,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:01:58,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-03-20 15:01:58,387 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:01:58,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [656401558] [2022-03-20 15:01:58,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [656401558] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:01:58,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:01:58,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 15:01:58,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518074404] [2022-03-20 15:01:58,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:01:58,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 15:01:58,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:01:58,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 15:01:58,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-20 15:01:58,388 INFO L87 Difference]: Start difference. First operand 296 states and 371 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 15:02:00,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:02:00,705 INFO L93 Difference]: Finished difference Result 322 states and 397 transitions. [2022-03-20 15:02:00,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 15:02:00,706 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 115 [2022-03-20 15:02:00,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:02:00,707 INFO L225 Difference]: With dead ends: 322 [2022-03-20 15:02:00,707 INFO L226 Difference]: Without dead ends: 320 [2022-03-20 15:02:00,708 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-20 15:02:00,708 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 15 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:02:00,708 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 273 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 15:02:00,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-03-20 15:02:00,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 318. [2022-03-20 15:02:00,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 189 states have (on average 1.08994708994709) internal successors, (206), 192 states have internal predecessors, (206), 94 states have call successors, (94), 35 states have call predecessors, (94), 34 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2022-03-20 15:02:00,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 393 transitions. [2022-03-20 15:02:00,824 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 393 transitions. Word has length 115 [2022-03-20 15:02:00,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:02:00,824 INFO L478 AbstractCegarLoop]: Abstraction has 318 states and 393 transitions. [2022-03-20 15:02:00,824 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 15:02:00,825 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 393 transitions. [2022-03-20 15:02:00,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 15:02:00,825 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:02:00,825 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:02:00,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 15:02:01,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:02:01,039 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:02:01,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:02:01,040 INFO L85 PathProgramCache]: Analyzing trace with hash -618835194, now seen corresponding path program 37 times [2022-03-20 15:02:01,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:02:01,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1241704635] [2022-03-20 15:02:01,040 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:02:01,040 INFO L85 PathProgramCache]: Analyzing trace with hash -618835194, now seen corresponding path program 38 times [2022-03-20 15:02:01,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:02:01,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8720406] [2022-03-20 15:02:01,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:02:01,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:02:01,045 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:02:01,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [956189992] [2022-03-20 15:02:01,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:02:01,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:02:01,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:02:01,047 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) [2022-03-20 15:02:01,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 15:02:01,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:02:01,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:02:01,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 15:02:01,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:02:01,281 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 258 proven. 39 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2022-03-20 15:02:01,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:02:01,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:02:01,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8720406] [2022-03-20 15:02:01,560 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:02:01,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956189992] [2022-03-20 15:02:01,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956189992] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:02:01,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:02:01,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 15:02:01,560 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:02:01,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1241704635] [2022-03-20 15:02:01,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1241704635] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:02:01,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:02:01,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 15:02:01,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624911527] [2022-03-20 15:02:01,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:02:01,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 15:02:01,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:02:01,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 15:02:01,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-20 15:02:01,561 INFO L87 Difference]: Start difference. First operand 318 states and 393 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-20 15:02:01,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:02:01,807 INFO L93 Difference]: Finished difference Result 410 states and 518 transitions. [2022-03-20 15:02:01,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 15:02:01,808 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 128 [2022-03-20 15:02:01,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:02:01,809 INFO L225 Difference]: With dead ends: 410 [2022-03-20 15:02:01,809 INFO L226 Difference]: Without dead ends: 337 [2022-03-20 15:02:01,809 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-03-20 15:02:01,814 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 16 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:02:01,814 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 269 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:02:01,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-03-20 15:02:01,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2022-03-20 15:02:01,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 198 states have (on average 1.095959595959596) internal successors, (217), 201 states have internal predecessors, (217), 104 states have call successors, (104), 35 states have call predecessors, (104), 34 states have return successors, (102), 100 states have call predecessors, (102), 102 states have call successors, (102) [2022-03-20 15:02:01,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 423 transitions. [2022-03-20 15:02:01,923 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 423 transitions. Word has length 128 [2022-03-20 15:02:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:02:01,923 INFO L478 AbstractCegarLoop]: Abstraction has 337 states and 423 transitions. [2022-03-20 15:02:01,923 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-20 15:02:01,923 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 423 transitions. [2022-03-20 15:02:01,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 15:02:01,924 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:02:01,924 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:02:01,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 15:02:02,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-20 15:02:02,141 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:02:02,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:02:02,141 INFO L85 PathProgramCache]: Analyzing trace with hash -565723256, now seen corresponding path program 39 times [2022-03-20 15:02:02,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:02:02,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2099474783] [2022-03-20 15:02:02,141 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:02:02,142 INFO L85 PathProgramCache]: Analyzing trace with hash -565723256, now seen corresponding path program 40 times [2022-03-20 15:02:02,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:02:02,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307072602] [2022-03-20 15:02:02,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:02:02,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:02:02,148 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:02:02,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850357408] [2022-03-20 15:02:02,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:02:02,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:02:02,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:02:02,149 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) [2022-03-20 15:02:02,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 15:02:02,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:02:02,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:02:02,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 15:02:02,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:02:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 111 proven. 63 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2022-03-20 15:02:02,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:02:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 53 proven. 63 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-03-20 15:02:02,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:02:02,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307072602] [2022-03-20 15:02:02,896 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:02:02,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850357408] [2022-03-20 15:02:02,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850357408] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:02:02,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:02:02,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-03-20 15:02:02,897 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:02:02,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2099474783] [2022-03-20 15:02:02,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2099474783] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:02:02,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:02:02,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 15:02:02,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751798099] [2022-03-20 15:02:02,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:02:02,897 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 15:02:02,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:02:02,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 15:02:02,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-03-20 15:02:02,898 INFO L87 Difference]: Start difference. First operand 337 states and 423 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 15:02:03,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:02:03,228 INFO L93 Difference]: Finished difference Result 437 states and 568 transitions. [2022-03-20 15:02:03,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 15:02:03,229 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 128 [2022-03-20 15:02:03,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:02:03,230 INFO L225 Difference]: With dead ends: 437 [2022-03-20 15:02:03,230 INFO L226 Difference]: Without dead ends: 367 [2022-03-20 15:02:03,232 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2022-03-20 15:02:03,232 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 14 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:02:03,232 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 352 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:02:03,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-03-20 15:02:03,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 345. [2022-03-20 15:02:03,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 200 states have (on average 1.09) internal successors, (218), 205 states have internal predecessors, (218), 110 states have call successors, (110), 35 states have call predecessors, (110), 34 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2022-03-20 15:02:03,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 436 transitions. [2022-03-20 15:02:03,351 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 436 transitions. Word has length 128 [2022-03-20 15:02:03,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:02:03,352 INFO L478 AbstractCegarLoop]: Abstraction has 345 states and 436 transitions. [2022-03-20 15:02:03,352 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 15:02:03,352 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 436 transitions. [2022-03-20 15:02:03,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 15:02:03,352 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:02:03,353 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:02:03,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-20 15:02:03,569 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:02:03,569 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:02:03,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:02:03,570 INFO L85 PathProgramCache]: Analyzing trace with hash 759132938, now seen corresponding path program 41 times [2022-03-20 15:02:03,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:02:03,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [46360341] [2022-03-20 15:02:03,570 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:02:03,570 INFO L85 PathProgramCache]: Analyzing trace with hash 759132938, now seen corresponding path program 42 times [2022-03-20 15:02:03,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:02:03,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627026417] [2022-03-20 15:02:03,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:02:03,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:02:03,576 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:02:03,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877753419] [2022-03-20 15:02:03,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:02:03,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:02:03,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:02:03,578 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) [2022-03-20 15:02:03,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 15:02:03,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 15:02:03,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:02:03,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 15:02:03,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:02:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 176 proven. 18 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2022-03-20 15:02:03,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:02:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-03-20 15:02:04,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:02:04,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627026417] [2022-03-20 15:02:04,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:02:04,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877753419] [2022-03-20 15:02:04,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877753419] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:02:04,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:02:04,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-20 15:02:04,109 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:02:04,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [46360341] [2022-03-20 15:02:04,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [46360341] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:02:04,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:02:04,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 15:02:04,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913101908] [2022-03-20 15:02:04,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:02:04,109 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 15:02:04,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:02:04,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 15:02:04,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-20 15:02:04,110 INFO L87 Difference]: Start difference. First operand 345 states and 436 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 15:02:04,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:02:04,535 INFO L93 Difference]: Finished difference Result 345 states and 436 transitions. [2022-03-20 15:02:04,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 15:02:04,536 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 128 [2022-03-20 15:02:04,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:02:04,536 INFO L225 Difference]: With dead ends: 345 [2022-03-20 15:02:04,536 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 15:02:04,537 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 241 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-20 15:02:04,537 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:02:04,537 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 157 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 45 Invalid, 0 Unknown, 9 Unchecked, 0.3s Time] [2022-03-20 15:02:04,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 15:02:04,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 15:02:04,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 15:02:04,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 15:02:04,538 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 128 [2022-03-20 15:02:04,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:02:04,538 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 15:02:04,538 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 15:02:04,538 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 15:02:04,538 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 15:02:04,540 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 15:02:04,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 15:02:04,746 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:02:04,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 15:02:20,216 WARN L232 SmtUtils]: Spent 11.71s on a formula simplification. DAG size of input: 522 DAG size of output: 479 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-20 15:02:32,197 WARN L232 SmtUtils]: Spent 9.84s on a formula simplification. DAG size of input: 495 DAG size of output: 457 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-20 15:02:44,309 WARN L232 SmtUtils]: Spent 7.83s on a formula simplification. DAG size of input: 76 DAG size of output: 46 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 15:03:09,348 WARN L232 SmtUtils]: Spent 22.49s on a formula simplification. DAG size of input: 78 DAG size of output: 44 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 15:04:54,608 WARN L232 SmtUtils]: Spent 1.75m on a formula simplification. DAG size of input: 445 DAG size of output: 40 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 15:06:11,722 WARN L232 SmtUtils]: Spent 1.29m on a formula simplification. DAG size of input: 216 DAG size of output: 1 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 15:07:56,573 WARN L232 SmtUtils]: Spent 1.75m on a formula simplification. DAG size of input: 446 DAG size of output: 35 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 15:08:08,462 WARN L232 SmtUtils]: Spent 11.89s on a formula simplification. DAG size of input: 78 DAG size of output: 44 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 15:08:20,404 WARN L232 SmtUtils]: Spent 11.86s on a formula simplification. DAG size of input: 82 DAG size of output: 45 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 15:10:08,740 WARN L232 SmtUtils]: Spent 1.81m on a formula simplification. DAG size of input: 425 DAG size of output: 39 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)