/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 01:59:02,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 01:59:02,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 01:59:02,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 01:59:02,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 01:59:02,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 01:59:02,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 01:59:02,927 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-04-06 01:59:02,949 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 01:59:02,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 01:59:02,949 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-04-06 01:59:02,949 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-04-06 01:59:02,950 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 01:59:02,950 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 01:59:02,951 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 01:59:02,951 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 01:59:02,951 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 01:59:02,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 01:59:02,952 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 01:59:02,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 01:59:02,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 01:59:02,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 01:59:02,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 01:59:02,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 01:59:02,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 01:59:02,953 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 01:59:02,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 01:59:02,953 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 01:59:02,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 01:59:02,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 01:59:02,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 01:59:02,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 01:59:02,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 01:59:02,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 01:59:02,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 01:59:02,955 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 01:59:02,955 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 01:59:02,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 01:59:02,955 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-04-06 01:59:02,955 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-04-06 01:59:02,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 01:59:02,956 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 01:59:03,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 01:59:03,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 01:59:03,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 01:59:03,192 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 01:59:03,193 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 01:59:03,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound100.c [2022-04-06 01:59:03,257 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc4e9501a/f08dc956938041098526ca8683e2e4a0/FLAGb54f4c064 [2022-04-06 01:59:03,572 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 01:59:03,572 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound100.c [2022-04-06 01:59:03,577 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc4e9501a/f08dc956938041098526ca8683e2e4a0/FLAGb54f4c064 [2022-04-06 01:59:03,585 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc4e9501a/f08dc956938041098526ca8683e2e4a0 [2022-04-06 01:59:03,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 01:59:03,588 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 01:59:03,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 01:59:03,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 01:59:03,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 01:59:03,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 01:59:03" (1/1) ... [2022-04-06 01:59:03,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c47b241 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:59:03, skipping insertion in model container [2022-04-06 01:59:03,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 01:59:03" (1/1) ... [2022-04-06 01:59:03,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 01:59:03,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 01:59:03,746 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound100.c[535,548] [2022-04-06 01:59:03,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 01:59:03,784 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 01:59:03,797 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound100.c[535,548] [2022-04-06 01:59:03,808 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 01:59:03,817 INFO L208 MainTranslator]: Completed translation [2022-04-06 01:59:03,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:59:03 WrapperNode [2022-04-06 01:59:03,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 01:59:03,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 01:59:03,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 01:59:03,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 01:59:03,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:59:03" (1/1) ... [2022-04-06 01:59:03,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:59:03" (1/1) ... [2022-04-06 01:59:03,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:59:03" (1/1) ... [2022-04-06 01:59:03,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:59:03" (1/1) ... [2022-04-06 01:59:03,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:59:03" (1/1) ... [2022-04-06 01:59:03,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:59:03" (1/1) ... [2022-04-06 01:59:03,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:59:03" (1/1) ... [2022-04-06 01:59:03,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 01:59:03,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 01:59:03,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 01:59:03,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 01:59:03,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:59:03" (1/1) ... [2022-04-06 01:59:03,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 01:59:03,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:03,870 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) [2022-04-06 01:59:03,880 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 [2022-04-06 01:59:03,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 01:59:03,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 01:59:03,903 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 01:59:03,903 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 01:59:03,905 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 01:59:03,906 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 01:59:03,906 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 01:59:03,906 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 01:59:03,906 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 01:59:03,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 01:59:03,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 01:59:03,907 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 01:59:03,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 01:59:03,907 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 01:59:03,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 01:59:03,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 01:59:03,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 01:59:03,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 01:59:03,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 01:59:03,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 01:59:03,952 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 01:59:03,953 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 01:59:04,109 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 01:59:04,121 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 01:59:04,121 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-06 01:59:04,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:59:04 BoogieIcfgContainer [2022-04-06 01:59:04,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 01:59:04,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 01:59:04,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 01:59:04,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 01:59:04,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 01:59:03" (1/3) ... [2022-04-06 01:59:04,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15cbdf23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 01:59:04, skipping insertion in model container [2022-04-06 01:59:04,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:59:03" (2/3) ... [2022-04-06 01:59:04,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15cbdf23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 01:59:04, skipping insertion in model container [2022-04-06 01:59:04,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:59:04" (3/3) ... [2022-04-06 01:59:04,135 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound100.c [2022-04-06 01:59:04,139 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 01:59:04,139 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 01:59:04,172 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 01:59:04,177 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 01:59:04,178 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 01:59:04,192 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 01:59:04,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 01:59:04,195 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 01:59:04,196 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 01:59:04,196 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 01:59:04,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 01:59:04,200 INFO L85 PathProgramCache]: Analyzing trace with hash 928708300, now seen corresponding path program 1 times [2022-04-06 01:59:04,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 01:59:04,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999628182] [2022-04-06 01:59:04,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:04,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 01:59:04,331 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 01:59:04,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083317197] [2022-04-06 01:59:04,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:04,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:04,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:04,339 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) [2022-04-06 01:59:04,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 01:59:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 01:59:04,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2022-04-06 01:59:04,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 01:59:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 01:59:04,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 01:59:04,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 01:59:04,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999628182] [2022-04-06 01:59:04,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 01:59:04,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083317197] [2022-04-06 01:59:04,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083317197] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 01:59:04,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 01:59:04,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-06 01:59:04,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247114948] [2022-04-06 01:59:04,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 01:59:04,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-04-06 01:59:04,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 01:59:04,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-04-06 01:59:04,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-04-06 01:59:04,570 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 01:59:04,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 01:59:04,592 INFO L93 Difference]: Finished difference Result 67 states and 100 transitions. [2022-04-06 01:59:04,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-04-06 01:59:04,594 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-06 01:59:04,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 01:59:04,599 INFO L225 Difference]: With dead ends: 67 [2022-04-06 01:59:04,600 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 01:59:04,603 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-04-06 01:59:04,606 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 01:59:04,607 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 01:59:04,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 01:59:04,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 01:59:04,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 01:59:04,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-04-06 01:59:04,644 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2022-04-06 01:59:04,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 01:59:04,645 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-04-06 01:59:04,645 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 01:59:04,645 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-04-06 01:59:04,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 01:59:04,647 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 01:59:04,648 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 01:59:04,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 01:59:04,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-04-06 01:59:04,864 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 01:59:04,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 01:59:04,864 INFO L85 PathProgramCache]: Analyzing trace with hash -155606603, now seen corresponding path program 1 times [2022-04-06 01:59:04,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 01:59:04,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536138957] [2022-04-06 01:59:04,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:04,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 01:59:04,888 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 01:59:04,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807289286] [2022-04-06 01:59:04,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:04,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:04,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:04,891 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) [2022-04-06 01:59:04,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 01:59:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 01:59:04,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 01:59:04,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 01:59:05,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 01:59:05,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 01:59:05,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 01:59:05,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536138957] [2022-04-06 01:59:05,077 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 01:59:05,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807289286] [2022-04-06 01:59:05,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807289286] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 01:59:05,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 01:59:05,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 01:59:05,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973311371] [2022-04-06 01:59:05,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 01:59:05,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 01:59:05,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 01:59:05,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 01:59:05,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 01:59:05,079 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 01:59:05,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 01:59:05,095 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2022-04-06 01:59:05,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 01:59:05,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-06 01:59:05,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 01:59:05,096 INFO L225 Difference]: With dead ends: 41 [2022-04-06 01:59:05,096 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 01:59:05,097 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 01:59:05,098 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 01:59:05,098 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 01:59:05,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 01:59:05,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-04-06 01:59:05,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 01:59:05,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-04-06 01:59:05,105 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2022-04-06 01:59:05,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 01:59:05,106 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-04-06 01:59:05,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 01:59:05,107 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-04-06 01:59:05,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 01:59:05,107 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 01:59:05,107 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 01:59:05,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 01:59:05,333 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-04-06 01:59:05,334 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 01:59:05,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 01:59:05,335 INFO L85 PathProgramCache]: Analyzing trace with hash -153938307, now seen corresponding path program 1 times [2022-04-06 01:59:05,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 01:59:05,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161005625] [2022-04-06 01:59:05,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:05,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 01:59:05,346 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 01:59:05,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256067717] [2022-04-06 01:59:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:05,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:05,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:05,348 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) [2022-04-06 01:59:05,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 01:59:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 01:59:05,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 01:59:05,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 01:59:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 01:59:08,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 01:59:08,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 01:59:08,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161005625] [2022-04-06 01:59:08,454 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 01:59:08,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256067717] [2022-04-06 01:59:08,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256067717] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 01:59:08,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 01:59:08,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 01:59:08,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310556965] [2022-04-06 01:59:08,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 01:59:08,455 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 01:59:08,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 01:59:08,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 01:59:08,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 01:59:08,459 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 01:59:10,963 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 01:59:13,517 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 [] [2022-04-06 01:59:13,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 01:59:13,551 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-04-06 01:59:13,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 01:59:13,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-04-06 01:59:13,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 01:59:13,553 INFO L225 Difference]: With dead ends: 53 [2022-04-06 01:59:13,553 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 01:59:13,553 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 01:59:13,554 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-04-06 01:59:13,555 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 116 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2022-04-06 01:59:13,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 01:59:13,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-04-06 01:59:13,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 01:59:13,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2022-04-06 01:59:13,564 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2022-04-06 01:59:13,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 01:59:13,565 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2022-04-06 01:59:13,565 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 01:59:13,565 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2022-04-06 01:59:13,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 01:59:13,566 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 01:59:13,566 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 01:59:13,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 01:59:13,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:13,767 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 01:59:13,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 01:59:13,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1676885497, now seen corresponding path program 1 times [2022-04-06 01:59:13,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 01:59:13,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814250623] [2022-04-06 01:59:13,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:13,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 01:59:13,779 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 01:59:13,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237775622] [2022-04-06 01:59:13,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:13,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:13,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:13,782 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) [2022-04-06 01:59:13,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 01:59:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 01:59:13,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 01:59:13,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 01:59:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 01:59:13,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 01:59:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 01:59:14,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 01:59:14,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814250623] [2022-04-06 01:59:14,090 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 01:59:14,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237775622] [2022-04-06 01:59:14,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237775622] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 01:59:14,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 01:59:14,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-06 01:59:14,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054571625] [2022-04-06 01:59:14,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 01:59:14,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 01:59:14,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 01:59:14,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 01:59:14,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-06 01:59:14,093 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 01:59:14,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 01:59:14,221 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2022-04-06 01:59:14,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 01:59:14,222 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2022-04-06 01:59:14,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 01:59:14,223 INFO L225 Difference]: With dead ends: 57 [2022-04-06 01:59:14,223 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 01:59:14,223 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-04-06 01:59:14,224 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 01:59:14,225 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 101 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 01:59:14,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 01:59:14,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2022-04-06 01:59:14,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 01:59:14,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-04-06 01:59:14,232 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 29 [2022-04-06 01:59:14,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 01:59:14,233 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-04-06 01:59:14,233 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 01:59:14,233 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-04-06 01:59:14,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 01:59:14,234 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 01:59:14,234 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 01:59:14,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 01:59:14,434 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:14,435 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 01:59:14,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 01:59:14,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1154059858, now seen corresponding path program 1 times [2022-04-06 01:59:14,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 01:59:14,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937238759] [2022-04-06 01:59:14,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:14,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 01:59:14,444 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 01:59:14,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716895276] [2022-04-06 01:59:14,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:14,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:14,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:14,446 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) [2022-04-06 01:59:14,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 01:59:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 01:59:14,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 01:59:14,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 01:59:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 01:59:14,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 01:59:14,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 01:59:14,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937238759] [2022-04-06 01:59:14,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 01:59:14,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716895276] [2022-04-06 01:59:14,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716895276] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 01:59:14,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 01:59:14,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 01:59:14,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830301748] [2022-04-06 01:59:14,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 01:59:14,559 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 01:59:14,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 01:59:14,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 01:59:14,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 01:59:14,560 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 01:59:14,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 01:59:14,586 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2022-04-06 01:59:14,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 01:59:14,586 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2022-04-06 01:59:14,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 01:59:14,587 INFO L225 Difference]: With dead ends: 65 [2022-04-06 01:59:14,587 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 01:59:14,588 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 01:59:14,589 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 01:59:14,589 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 103 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 01:59:14,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 01:59:14,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-04-06 01:59:14,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 01:59:14,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-04-06 01:59:14,602 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 35 [2022-04-06 01:59:14,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 01:59:14,602 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-04-06 01:59:14,602 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 01:59:14,602 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-04-06 01:59:14,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 01:59:14,604 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 01:59:14,604 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 01:59:14,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 01:59:14,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:14,824 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 01:59:14,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 01:59:14,824 INFO L85 PathProgramCache]: Analyzing trace with hash -174895632, now seen corresponding path program 1 times [2022-04-06 01:59:14,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 01:59:14,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320468523] [2022-04-06 01:59:14,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:14,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 01:59:14,833 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 01:59:14,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149375579] [2022-04-06 01:59:14,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:14,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:14,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:14,835 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) [2022-04-06 01:59:14,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 01:59:14,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 01:59:14,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 01:59:14,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 01:59:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 01:59:14,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 01:59:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 01:59:15,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 01:59:15,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320468523] [2022-04-06 01:59:15,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 01:59:15,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149375579] [2022-04-06 01:59:15,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149375579] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 01:59:15,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 01:59:15,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-04-06 01:59:15,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014127781] [2022-04-06 01:59:15,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 01:59:15,106 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 01:59:15,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 01:59:15,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 01:59:15,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 01:59:15,107 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-06 01:59:15,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 01:59:15,147 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2022-04-06 01:59:15,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 01:59:15,148 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-04-06 01:59:15,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 01:59:15,149 INFO L225 Difference]: With dead ends: 74 [2022-04-06 01:59:15,149 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 01:59:15,149 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 01:59:15,150 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 28 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 01:59:15,150 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 112 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 01:59:15,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 01:59:15,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-04-06 01:59:15,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 01:59:15,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-04-06 01:59:15,158 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 41 [2022-04-06 01:59:15,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 01:59:15,159 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-04-06 01:59:15,159 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-06 01:59:15,159 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-04-06 01:59:15,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 01:59:15,160 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 01:59:15,160 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 01:59:15,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 01:59:15,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:15,364 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 01:59:15,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 01:59:15,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1292932747, now seen corresponding path program 1 times [2022-04-06 01:59:15,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 01:59:15,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289140772] [2022-04-06 01:59:15,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:15,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 01:59:15,373 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 01:59:15,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975288541] [2022-04-06 01:59:15,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:15,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:15,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:15,374 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) [2022-04-06 01:59:15,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 01:59:15,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 01:59:15,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 01:59:15,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 01:59:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 01:59:15,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 01:59:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 01:59:15,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 01:59:15,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289140772] [2022-04-06 01:59:15,634 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 01:59:15,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975288541] [2022-04-06 01:59:15,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975288541] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 01:59:15,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 01:59:15,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-06 01:59:15,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374359002] [2022-04-06 01:59:15,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 01:59:15,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 01:59:15,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 01:59:15,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 01:59:15,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 01:59:15,636 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-04-06 01:59:15,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 01:59:15,769 INFO L93 Difference]: Finished difference Result 129 states and 160 transitions. [2022-04-06 01:59:15,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 01:59:15,770 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 43 [2022-04-06 01:59:15,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 01:59:15,771 INFO L225 Difference]: With dead ends: 129 [2022-04-06 01:59:15,771 INFO L226 Difference]: Without dead ends: 108 [2022-04-06 01:59:15,771 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-04-06 01:59:15,772 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 88 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 01:59:15,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 180 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 01:59:15,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-04-06 01:59:15,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2022-04-06 01:59:15,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 69 states have internal predecessors, (83), 18 states have call successors, (18), 10 states have call predecessors, (18), 8 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 01:59:15,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2022-04-06 01:59:15,802 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 43 [2022-04-06 01:59:15,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 01:59:15,803 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2022-04-06 01:59:15,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-04-06 01:59:15,803 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2022-04-06 01:59:15,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 01:59:15,804 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 01:59:15,804 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 01:59:15,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 01:59:16,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:16,020 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 01:59:16,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 01:59:16,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1407897436, now seen corresponding path program 1 times [2022-04-06 01:59:16,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 01:59:16,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171245987] [2022-04-06 01:59:16,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:16,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 01:59:16,031 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 01:59:16,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [544555332] [2022-04-06 01:59:16,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:16,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:16,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:16,036 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) [2022-04-06 01:59:16,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 01:59:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 01:59:16,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 01:59:16,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 01:59:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 01:59:16,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 01:59:16,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 01:59:16,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171245987] [2022-04-06 01:59:16,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 01:59:16,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544555332] [2022-04-06 01:59:16,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544555332] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 01:59:16,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 01:59:16,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 01:59:16,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190438340] [2022-04-06 01:59:16,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 01:59:16,177 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 01:59:16,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 01:59:16,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 01:59:16,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-04-06 01:59:16,178 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 01:59:16,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 01:59:16,214 INFO L93 Difference]: Finished difference Result 158 states and 202 transitions. [2022-04-06 01:59:16,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 01:59:16,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-04-06 01:59:16,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 01:59:16,217 INFO L225 Difference]: With dead ends: 158 [2022-04-06 01:59:16,217 INFO L226 Difference]: Without dead ends: 119 [2022-04-06 01:59:16,217 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-04-06 01:59:16,218 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 23 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 01:59:16,218 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 94 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 01:59:16,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-04-06 01:59:16,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2022-04-06 01:59:16,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 80 states have internal predecessors, (97), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 01:59:16,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 137 transitions. [2022-04-06 01:59:16,235 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 137 transitions. Word has length 47 [2022-04-06 01:59:16,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 01:59:16,235 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 137 transitions. [2022-04-06 01:59:16,235 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 01:59:16,236 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 137 transitions. [2022-04-06 01:59:16,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 01:59:16,236 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 01:59:16,237 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 01:59:16,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 01:59:16,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-04-06 01:59:16,459 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 01:59:16,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 01:59:16,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1915058849, now seen corresponding path program 1 times [2022-04-06 01:59:16,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 01:59:16,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788709330] [2022-04-06 01:59:16,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:16,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 01:59:16,467 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 01:59:16,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261204448] [2022-04-06 01:59:16,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:16,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:16,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:16,469 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) [2022-04-06 01:59:16,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 01:59:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 01:59:16,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 01:59:16,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 01:59:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 01:59:16,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 01:59:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 01:59:16,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 01:59:16,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788709330] [2022-04-06 01:59:16,762 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 01:59:16,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261204448] [2022-04-06 01:59:16,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261204448] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 01:59:16,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 01:59:16,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-06 01:59:16,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041709823] [2022-04-06 01:59:16,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 01:59:16,763 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 01:59:16,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 01:59:16,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 01:59:16,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-06 01:59:16,764 INFO L87 Difference]: Start difference. First operand 109 states and 137 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2022-04-06 01:59:16,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 01:59:16,953 INFO L93 Difference]: Finished difference Result 219 states and 283 transitions. [2022-04-06 01:59:16,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 01:59:16,954 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) Word has length 49 [2022-04-06 01:59:16,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 01:59:16,955 INFO L225 Difference]: With dead ends: 219 [2022-04-06 01:59:16,955 INFO L226 Difference]: Without dead ends: 172 [2022-04-06 01:59:16,956 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-04-06 01:59:16,956 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 181 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 01:59:16,957 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 201 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 01:59:16,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-04-06 01:59:16,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 153. [2022-04-06 01:59:16,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 113 states have internal predecessors, (139), 30 states have call successors, (30), 12 states have call predecessors, (30), 10 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 01:59:16,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 197 transitions. [2022-04-06 01:59:16,975 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 197 transitions. Word has length 49 [2022-04-06 01:59:16,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 01:59:16,976 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 197 transitions. [2022-04-06 01:59:16,976 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2022-04-06 01:59:16,976 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 197 transitions. [2022-04-06 01:59:16,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 01:59:16,977 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 01:59:16,977 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 01:59:17,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 01:59:17,193 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:17,193 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 01:59:17,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 01:59:17,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1067781299, now seen corresponding path program 1 times [2022-04-06 01:59:17,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 01:59:17,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416939177] [2022-04-06 01:59:17,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:17,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 01:59:17,201 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 01:59:17,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541143556] [2022-04-06 01:59:17,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:17,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:17,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:17,203 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) [2022-04-06 01:59:17,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 01:59:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 01:59:17,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 01:59:17,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 01:59:17,359 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 01:59:17,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 01:59:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 01:59:17,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 01:59:17,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416939177] [2022-04-06 01:59:17,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 01:59:17,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541143556] [2022-04-06 01:59:17,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541143556] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 01:59:17,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 01:59:17,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 01:59:17,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484694168] [2022-04-06 01:59:17,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 01:59:17,503 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 01:59:17,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 01:59:17,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 01:59:17,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 01:59:17,504 INFO L87 Difference]: Start difference. First operand 153 states and 197 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-04-06 01:59:17,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 01:59:17,748 INFO L93 Difference]: Finished difference Result 211 states and 278 transitions. [2022-04-06 01:59:17,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 01:59:17,748 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) Word has length 55 [2022-04-06 01:59:17,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 01:59:17,751 INFO L225 Difference]: With dead ends: 211 [2022-04-06 01:59:17,751 INFO L226 Difference]: Without dead ends: 206 [2022-04-06 01:59:17,751 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2022-04-06 01:59:17,752 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 187 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 01:59:17,753 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 266 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 01:59:17,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-04-06 01:59:17,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2022-04-06 01:59:17,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 145 states have (on average 1.2344827586206897) internal successors, (179), 149 states have internal predecessors, (179), 40 states have call successors, (40), 14 states have call predecessors, (40), 12 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2022-04-06 01:59:17,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 257 transitions. [2022-04-06 01:59:17,781 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 257 transitions. Word has length 55 [2022-04-06 01:59:17,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 01:59:17,781 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 257 transitions. [2022-04-06 01:59:17,782 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-04-06 01:59:17,782 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 257 transitions. [2022-04-06 01:59:17,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 01:59:17,785 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 01:59:17,785 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 01:59:17,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 01:59:17,999 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 01:59:17,999 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 01:59:18,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 01:59:18,000 INFO L85 PathProgramCache]: Analyzing trace with hash -304792209, now seen corresponding path program 1 times [2022-04-06 01:59:18,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 01:59:18,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918122140] [2022-04-06 01:59:18,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:18,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 01:59:18,009 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 01:59:18,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692994563] [2022-04-06 01:59:18,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:18,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:18,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:18,013 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) [2022-04-06 01:59:18,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 01:59:18,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 01:59:18,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 01:59:18,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 01:59:18,224 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-04-06 01:59:18,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 01:59:18,399 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-04-06 01:59:18,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 01:59:18,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918122140] [2022-04-06 01:59:18,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 01:59:18,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692994563] [2022-04-06 01:59:18,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692994563] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 01:59:18,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 01:59:18,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-04-06 01:59:18,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79570320] [2022-04-06 01:59:18,407 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 01:59:18,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 01:59:18,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 01:59:18,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 01:59:18,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 01:59:18,408 INFO L87 Difference]: Start difference. First operand 198 states and 257 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 01:59:18,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 01:59:18,490 INFO L93 Difference]: Finished difference Result 502 states and 697 transitions. [2022-04-06 01:59:18,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 01:59:18,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 91 [2022-04-06 01:59:18,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 01:59:18,496 INFO L225 Difference]: With dead ends: 502 [2022-04-06 01:59:18,496 INFO L226 Difference]: Without dead ends: 359 [2022-04-06 01:59:18,498 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 01:59:18,499 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 16 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 01:59:18,499 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 142 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 01:59:18,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-04-06 01:59:18,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 342. [2022-04-06 01:59:18,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 255 states have (on average 1.2666666666666666) internal successors, (323), 261 states have internal predecessors, (323), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2022-04-06 01:59:18,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 469 transitions. [2022-04-06 01:59:18,545 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 469 transitions. Word has length 91 [2022-04-06 01:59:18,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 01:59:18,546 INFO L478 AbstractCegarLoop]: Abstraction has 342 states and 469 transitions. [2022-04-06 01:59:18,546 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 01:59:18,546 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 469 transitions. [2022-04-06 01:59:18,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 01:59:18,547 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 01:59:18,548 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 01:59:18,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 01:59:18,758 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 01:59:18,759 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 01:59:18,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 01:59:18,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1103092705, now seen corresponding path program 2 times [2022-04-06 01:59:18,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 01:59:18,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435013216] [2022-04-06 01:59:18,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:18,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 01:59:18,777 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 01:59:18,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286479835] [2022-04-06 01:59:18,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 01:59:18,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:18,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:18,779 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) [2022-04-06 01:59:18,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 01:59:18,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 01:59:18,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 01:59:18,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 01:59:18,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 01:59:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 01:59:19,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 01:59:19,382 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-04-06 01:59:19,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 01:59:19,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435013216] [2022-04-06 01:59:19,382 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 01:59:19,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286479835] [2022-04-06 01:59:19,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286479835] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 01:59:19,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 01:59:19,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-04-06 01:59:19,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389153438] [2022-04-06 01:59:19,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 01:59:19,384 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 01:59:19,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 01:59:19,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 01:59:19,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-04-06 01:59:19,384 INFO L87 Difference]: Start difference. First operand 342 states and 469 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 18 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) [2022-04-06 01:59:19,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 01:59:19,890 INFO L93 Difference]: Finished difference Result 985 states and 1423 transitions. [2022-04-06 01:59:19,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 01:59:19,890 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 18 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) Word has length 91 [2022-04-06 01:59:19,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 01:59:19,894 INFO L225 Difference]: With dead ends: 985 [2022-04-06 01:59:19,894 INFO L226 Difference]: Without dead ends: 842 [2022-04-06 01:59:19,895 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=719, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 01:59:19,896 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 369 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 01:59:19,896 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 447 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 01:59:19,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-04-06 01:59:19,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 793. [2022-04-06 01:59:19,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 597 states have (on average 1.2680067001675042) internal successors, (757), 606 states have internal predecessors, (757), 177 states have call successors, (177), 20 states have call predecessors, (177), 18 states have return successors, (175), 166 states have call predecessors, (175), 175 states have call successors, (175) [2022-04-06 01:59:19,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1109 transitions. [2022-04-06 01:59:19,997 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1109 transitions. Word has length 91 [2022-04-06 01:59:19,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 01:59:19,997 INFO L478 AbstractCegarLoop]: Abstraction has 793 states and 1109 transitions. [2022-04-06 01:59:19,998 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 18 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) [2022-04-06 01:59:19,998 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1109 transitions. [2022-04-06 01:59:19,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 01:59:19,999 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 01:59:19,999 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 01:59:20,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 01:59:20,222 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 01:59:20,222 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 01:59:20,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 01:59:20,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1660747519, now seen corresponding path program 1 times [2022-04-06 01:59:20,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 01:59:20,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204139371] [2022-04-06 01:59:20,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:20,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 01:59:20,231 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 01:59:20,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079649560] [2022-04-06 01:59:20,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:20,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:20,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:20,233 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) [2022-04-06 01:59:20,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 01:59:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 01:59:20,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 01:59:20,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 01:59:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 01:59:20,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 01:59:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-04-06 01:59:20,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 01:59:20,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204139371] [2022-04-06 01:59:20,793 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 01:59:20,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079649560] [2022-04-06 01:59:20,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079649560] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 01:59:20,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 01:59:20,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-04-06 01:59:20,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794974140] [2022-04-06 01:59:20,793 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 01:59:20,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 01:59:20,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 01:59:20,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 01:59:20,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-06 01:59:20,795 INFO L87 Difference]: Start difference. First operand 793 states and 1109 transitions. Second operand has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) [2022-04-06 01:59:21,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 01:59:21,452 INFO L93 Difference]: Finished difference Result 1285 states and 1799 transitions. [2022-04-06 01:59:21,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 01:59:21,453 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) Word has length 97 [2022-04-06 01:59:21,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 01:59:21,456 INFO L225 Difference]: With dead ends: 1285 [2022-04-06 01:59:21,456 INFO L226 Difference]: Without dead ends: 795 [2022-04-06 01:59:21,458 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=1056, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 01:59:21,459 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 479 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 01:59:21,459 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 530 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 01:59:21,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-04-06 01:59:21,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 740. [2022-04-06 01:59:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 553 states have (on average 1.2206148282097649) internal successors, (675), 557 states have internal predecessors, (675), 164 states have call successors, (164), 24 states have call predecessors, (164), 22 states have return successors, (162), 158 states have call predecessors, (162), 162 states have call successors, (162) [2022-04-06 01:59:21,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1001 transitions. [2022-04-06 01:59:21,560 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1001 transitions. Word has length 97 [2022-04-06 01:59:21,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 01:59:21,561 INFO L478 AbstractCegarLoop]: Abstraction has 740 states and 1001 transitions. [2022-04-06 01:59:21,561 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) [2022-04-06 01:59:21,561 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1001 transitions. [2022-04-06 01:59:21,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 01:59:21,562 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 01:59:21,563 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 01:59:21,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 01:59:21,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 01:59:21,775 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 01:59:21,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 01:59:21,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1761003221, now seen corresponding path program 1 times [2022-04-06 01:59:21,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 01:59:21,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549652413] [2022-04-06 01:59:21,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:21,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 01:59:21,783 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 01:59:21,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095170836] [2022-04-06 01:59:21,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:21,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:21,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:21,785 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) [2022-04-06 01:59:21,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 01:59:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 01:59:21,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 01:59:21,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 01:59:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 01:59:22,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 01:59:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 01:59:22,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 01:59:22,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549652413] [2022-04-06 01:59:22,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 01:59:22,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095170836] [2022-04-06 01:59:22,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095170836] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 01:59:22,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 01:59:22,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-04-06 01:59:22,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904176889] [2022-04-06 01:59:22,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 01:59:22,373 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 01:59:22,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 01:59:22,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 01:59:22,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-04-06 01:59:22,374 INFO L87 Difference]: Start difference. First operand 740 states and 1001 transitions. Second operand has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 26 states have internal predecessors, (114), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2022-04-06 01:59:23,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 01:59:23,094 INFO L93 Difference]: Finished difference Result 850 states and 1161 transitions. [2022-04-06 01:59:23,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 01:59:23,094 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 26 states have internal predecessors, (114), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) Word has length 103 [2022-04-06 01:59:23,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 01:59:23,098 INFO L225 Difference]: With dead ends: 850 [2022-04-06 01:59:23,098 INFO L226 Difference]: Without dead ends: 845 [2022-04-06 01:59:23,099 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=670, Invalid=1222, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 01:59:23,099 INFO L913 BasicCegarLoop]: 93 mSDtfsCounter, 656 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 01:59:23,099 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 523 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 01:59:23,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-04-06 01:59:23,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 830. [2022-04-06 01:59:23,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 621 states have (on average 1.1996779388083736) internal successors, (745), 627 states have internal predecessors, (745), 184 states have call successors, (184), 26 states have call predecessors, (184), 24 states have return successors, (182), 176 states have call predecessors, (182), 182 states have call successors, (182) [2022-04-06 01:59:23,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1111 transitions. [2022-04-06 01:59:23,183 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1111 transitions. Word has length 103 [2022-04-06 01:59:23,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 01:59:23,183 INFO L478 AbstractCegarLoop]: Abstraction has 830 states and 1111 transitions. [2022-04-06 01:59:23,184 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 26 states have internal predecessors, (114), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2022-04-06 01:59:23,184 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1111 transitions. [2022-04-06 01:59:23,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-04-06 01:59:23,191 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 01:59:23,191 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 9, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 01:59:23,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 01:59:23,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:23,411 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 01:59:23,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 01:59:23,412 INFO L85 PathProgramCache]: Analyzing trace with hash -599363247, now seen corresponding path program 3 times [2022-04-06 01:59:23,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 01:59:23,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687668181] [2022-04-06 01:59:23,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:23,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 01:59:23,430 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 01:59:23,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1196446640] [2022-04-06 01:59:23,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 01:59:23,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:23,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:23,432 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) [2022-04-06 01:59:23,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 01:59:23,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 01:59:23,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 01:59:23,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 01:59:23,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 01:59:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 263 proven. 0 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2022-04-06 01:59:23,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 01:59:23,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 01:59:23,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687668181] [2022-04-06 01:59:23,715 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 01:59:23,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196446640] [2022-04-06 01:59:23,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196446640] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 01:59:23,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 01:59:23,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 01:59:23,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691102486] [2022-04-06 01:59:23,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 01:59:23,716 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 01:59:23,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 01:59:23,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 01:59:23,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-04-06 01:59:23,717 INFO L87 Difference]: Start difference. First operand 830 states and 1111 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 01:59:23,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 01:59:23,809 INFO L93 Difference]: Finished difference Result 1103 states and 1482 transitions. [2022-04-06 01:59:23,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 01:59:23,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 181 [2022-04-06 01:59:23,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 01:59:23,813 INFO L225 Difference]: With dead ends: 1103 [2022-04-06 01:59:23,814 INFO L226 Difference]: Without dead ends: 896 [2022-04-06 01:59:23,814 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 01:59:23,815 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 01:59:23,815 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 194 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 01:59:23,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-04-06 01:59:23,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 861. [2022-04-06 01:59:23,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 645 states have (on average 1.1767441860465115) internal successors, (759), 652 states have internal predecessors, (759), 186 states have call successors, (186), 31 states have call predecessors, (186), 29 states have return successors, (184), 177 states have call predecessors, (184), 184 states have call successors, (184) [2022-04-06 01:59:23,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1129 transitions. [2022-04-06 01:59:23,906 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1129 transitions. Word has length 181 [2022-04-06 01:59:23,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 01:59:23,906 INFO L478 AbstractCegarLoop]: Abstraction has 861 states and 1129 transitions. [2022-04-06 01:59:23,907 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 01:59:23,907 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1129 transitions. [2022-04-06 01:59:23,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-04-06 01:59:23,916 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 01:59:23,916 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 9, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 01:59:23,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 01:59:24,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 01:59:24,131 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 01:59:24,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 01:59:24,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1408642227, now seen corresponding path program 4 times [2022-04-06 01:59:24,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 01:59:24,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024540473] [2022-04-06 01:59:24,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:24,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 01:59:24,142 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 01:59:24,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711240415] [2022-04-06 01:59:24,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 01:59:24,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:24,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:24,143 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) [2022-04-06 01:59:24,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 01:59:24,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 01:59:24,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 01:59:24,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 2 conjunts are in the unsatisfiable core [2022-04-06 01:59:24,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 01:59:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 604 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2022-04-06 01:59:24,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 01:59:24,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 01:59:24,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024540473] [2022-04-06 01:59:24,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 01:59:24,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711240415] [2022-04-06 01:59:24,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711240415] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 01:59:24,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 01:59:24,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 01:59:24,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072622375] [2022-04-06 01:59:24,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 01:59:24,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 01:59:24,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 01:59:24,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 01:59:24,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 01:59:24,425 INFO L87 Difference]: Start difference. First operand 861 states and 1129 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-04-06 01:59:24,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 01:59:24,539 INFO L93 Difference]: Finished difference Result 1462 states and 1917 transitions. [2022-04-06 01:59:24,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 01:59:24,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 187 [2022-04-06 01:59:24,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 01:59:24,544 INFO L225 Difference]: With dead ends: 1462 [2022-04-06 01:59:24,544 INFO L226 Difference]: Without dead ends: 919 [2022-04-06 01:59:24,545 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 01:59:24,546 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 3 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 01:59:24,546 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 81 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 01:59:24,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-04-06 01:59:24,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 867. [2022-04-06 01:59:24,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 651 states have (on average 1.1751152073732718) internal successors, (765), 660 states have internal predecessors, (765), 186 states have call successors, (186), 31 states have call predecessors, (186), 29 states have return successors, (184), 175 states have call predecessors, (184), 184 states have call successors, (184) [2022-04-06 01:59:24,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1135 transitions. [2022-04-06 01:59:24,627 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1135 transitions. Word has length 187 [2022-04-06 01:59:24,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 01:59:24,627 INFO L478 AbstractCegarLoop]: Abstraction has 867 states and 1135 transitions. [2022-04-06 01:59:24,627 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-04-06 01:59:24,627 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1135 transitions. [2022-04-06 01:59:24,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-04-06 01:59:24,631 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 01:59:24,631 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 10, 9, 9, 9, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 01:59:24,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 01:59:24,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 01:59:24,847 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 01:59:24,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 01:59:24,848 INFO L85 PathProgramCache]: Analyzing trace with hash -464040263, now seen corresponding path program 5 times [2022-04-06 01:59:24,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 01:59:24,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746461696] [2022-04-06 01:59:24,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:24,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 01:59:24,859 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 01:59:24,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407496734] [2022-04-06 01:59:24,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 01:59:24,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:24,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:24,861 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) [2022-04-06 01:59:24,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 01:59:25,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-04-06 01:59:25,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 01:59:25,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 01:59:25,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 01:59:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 753 trivial. 0 not checked. [2022-04-06 01:59:25,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 01:59:25,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 01:59:25,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746461696] [2022-04-06 01:59:25,447 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 01:59:25,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407496734] [2022-04-06 01:59:25,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407496734] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 01:59:25,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 01:59:25,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 01:59:25,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668978837] [2022-04-06 01:59:25,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 01:59:25,448 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 01:59:25,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 01:59:25,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 01:59:25,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 01:59:25,448 INFO L87 Difference]: Start difference. First operand 867 states and 1135 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 01:59:25,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 01:59:25,526 INFO L93 Difference]: Finished difference Result 887 states and 1154 transitions. [2022-04-06 01:59:25,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 01:59:25,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 187 [2022-04-06 01:59:25,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 01:59:25,530 INFO L225 Difference]: With dead ends: 887 [2022-04-06 01:59:25,530 INFO L226 Difference]: Without dead ends: 831 [2022-04-06 01:59:25,531 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 01:59:25,531 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 01:59:25,531 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 143 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 01:59:25,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-04-06 01:59:25,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 806. [2022-04-06 01:59:25,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 604 states have (on average 1.1688741721854305) internal successors, (706), 612 states have internal predecessors, (706), 177 states have call successors, (177), 26 states have call predecessors, (177), 24 states have return successors, (175), 167 states have call predecessors, (175), 175 states have call successors, (175) [2022-04-06 01:59:25,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1058 transitions. [2022-04-06 01:59:25,607 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1058 transitions. Word has length 187 [2022-04-06 01:59:25,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 01:59:25,607 INFO L478 AbstractCegarLoop]: Abstraction has 806 states and 1058 transitions. [2022-04-06 01:59:25,607 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 01:59:25,607 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1058 transitions. [2022-04-06 01:59:25,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-04-06 01:59:25,611 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 01:59:25,611 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 9, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 01:59:25,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-04-06 01:59:25,816 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 01:59:25,817 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 01:59:25,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 01:59:25,817 INFO L85 PathProgramCache]: Analyzing trace with hash 372440269, now seen corresponding path program 6 times [2022-04-06 01:59:25,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 01:59:25,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653911340] [2022-04-06 01:59:25,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:25,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 01:59:25,827 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 01:59:25,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26705055] [2022-04-06 01:59:25,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 01:59:25,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:25,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:25,828 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) [2022-04-06 01:59:25,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 01:59:26,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 01:59:26,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 01:59:26,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 01:59:26,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 01:59:26,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2022-04-06 01:59:26,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 01:59:26,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 01:59:26,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653911340] [2022-04-06 01:59:26,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 01:59:26,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26705055] [2022-04-06 01:59:26,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26705055] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 01:59:26,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 01:59:26,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 01:59:26,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823932836] [2022-04-06 01:59:26,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 01:59:26,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 01:59:26,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 01:59:26,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 01:59:26,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-04-06 01:59:26,256 INFO L87 Difference]: Start difference. First operand 806 states and 1058 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 01:59:26,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 01:59:26,338 INFO L93 Difference]: Finished difference Result 853 states and 1107 transitions. [2022-04-06 01:59:26,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 01:59:26,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 187 [2022-04-06 01:59:26,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 01:59:26,341 INFO L225 Difference]: With dead ends: 853 [2022-04-06 01:59:26,341 INFO L226 Difference]: Without dead ends: 782 [2022-04-06 01:59:26,342 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-04-06 01:59:26,342 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 12 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 01:59:26,343 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 124 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 01:59:26,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-04-06 01:59:26,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 755. [2022-04-06 01:59:26,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 566 states have (on average 1.1625441696113075) internal successors, (658), 573 states have internal predecessors, (658), 164 states have call successors, (164), 26 states have call predecessors, (164), 24 states have return successors, (162), 155 states have call predecessors, (162), 162 states have call successors, (162) [2022-04-06 01:59:26,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 984 transitions. [2022-04-06 01:59:26,425 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 984 transitions. Word has length 187 [2022-04-06 01:59:26,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 01:59:26,426 INFO L478 AbstractCegarLoop]: Abstraction has 755 states and 984 transitions. [2022-04-06 01:59:26,426 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 01:59:26,426 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 984 transitions. [2022-04-06 01:59:26,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-04-06 01:59:26,429 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 01:59:26,430 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 01:59:26,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 01:59:26,636 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 01:59:26,636 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 01:59:26,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 01:59:26,636 INFO L85 PathProgramCache]: Analyzing trace with hash -288806385, now seen corresponding path program 7 times [2022-04-06 01:59:26,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 01:59:26,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069087083] [2022-04-06 01:59:26,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:26,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 01:59:26,644 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 01:59:26,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338188974] [2022-04-06 01:59:26,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 01:59:26,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:26,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:26,645 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) [2022-04-06 01:59:26,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 01:59:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 01:59:26,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 01:59:26,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 01:59:27,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 280 proven. 184 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2022-04-06 01:59:27,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 01:59:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 140 proven. 184 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-04-06 01:59:27,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 01:59:27,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069087083] [2022-04-06 01:59:27,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 01:59:27,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338188974] [2022-04-06 01:59:27,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338188974] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 01:59:27,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 01:59:27,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2022-04-06 01:59:27,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834407009] [2022-04-06 01:59:27,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 01:59:27,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 01:59:27,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 01:59:27,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 01:59:27,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-04-06 01:59:27,347 INFO L87 Difference]: Start difference. First operand 755 states and 984 transitions. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-04-06 01:59:28,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 01:59:28,052 INFO L93 Difference]: Finished difference Result 1720 states and 2275 transitions. [2022-04-06 01:59:28,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 01:59:28,053 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) Word has length 187 [2022-04-06 01:59:28,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 01:59:28,058 INFO L225 Difference]: With dead ends: 1720 [2022-04-06 01:59:28,059 INFO L226 Difference]: Without dead ends: 1523 [2022-04-06 01:59:28,059 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 363 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-04-06 01:59:28,060 INFO L913 BasicCegarLoop]: 201 mSDtfsCounter, 151 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 01:59:28,060 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 814 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 01:59:28,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2022-04-06 01:59:28,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 1314. [2022-04-06 01:59:28,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 986 states have (on average 1.1795131845841784) internal successors, (1163), 1002 states have internal predecessors, (1163), 303 states have call successors, (303), 26 states have call predecessors, (303), 24 states have return successors, (301), 285 states have call predecessors, (301), 301 states have call successors, (301) [2022-04-06 01:59:28,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 1767 transitions. [2022-04-06 01:59:28,204 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 1767 transitions. Word has length 187 [2022-04-06 01:59:28,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 01:59:28,205 INFO L478 AbstractCegarLoop]: Abstraction has 1314 states and 1767 transitions. [2022-04-06 01:59:28,205 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-04-06 01:59:28,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 1767 transitions. [2022-04-06 01:59:28,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-04-06 01:59:28,216 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 01:59:28,217 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 10, 9, 9, 9, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 01:59:28,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 01:59:28,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:28,440 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 01:59:28,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 01:59:28,440 INFO L85 PathProgramCache]: Analyzing trace with hash -719610275, now seen corresponding path program 8 times [2022-04-06 01:59:28,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 01:59:28,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514864347] [2022-04-06 01:59:28,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:28,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 01:59:28,451 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 01:59:28,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2056869337] [2022-04-06 01:59:28,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 01:59:28,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:28,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:28,463 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) [2022-04-06 01:59:28,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 01:59:28,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 01:59:28,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 01:59:28,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 01:59:28,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 01:59:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 516 proven. 84 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-04-06 01:59:28,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 01:59:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 226 proven. 84 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2022-04-06 01:59:29,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 01:59:29,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514864347] [2022-04-06 01:59:29,207 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 01:59:29,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056869337] [2022-04-06 01:59:29,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056869337] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 01:59:29,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 01:59:29,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 01:59:29,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068479369] [2022-04-06 01:59:29,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 01:59:29,208 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 01:59:29,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 01:59:29,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 01:59:29,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-04-06 01:59:29,209 INFO L87 Difference]: Start difference. First operand 1314 states and 1767 transitions. Second operand has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 14 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 14 states have call predecessors, (36), 14 states have call successors, (36) [2022-04-06 01:59:30,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 01:59:30,172 INFO L93 Difference]: Finished difference Result 2714 states and 3675 transitions. [2022-04-06 01:59:30,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 01:59:30,173 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 14 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 14 states have call predecessors, (36), 14 states have call successors, (36) Word has length 187 [2022-04-06 01:59:30,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 01:59:30,182 INFO L225 Difference]: With dead ends: 2714 [2022-04-06 01:59:30,183 INFO L226 Difference]: Without dead ends: 2417 [2022-04-06 01:59:30,184 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=385, Invalid=1097, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 01:59:30,185 INFO L913 BasicCegarLoop]: 153 mSDtfsCounter, 232 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 01:59:30,185 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 738 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 01:59:30,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2022-04-06 01:59:30,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1968. [2022-04-06 01:59:30,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1475 states have (on average 1.1627118644067798) internal successors, (1715), 1503 states have internal predecessors, (1715), 468 states have call successors, (468), 26 states have call predecessors, (468), 24 states have return successors, (466), 438 states have call predecessors, (466), 466 states have call successors, (466) [2022-04-06 01:59:30,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2649 transitions. [2022-04-06 01:59:30,432 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2649 transitions. Word has length 187 [2022-04-06 01:59:30,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 01:59:30,432 INFO L478 AbstractCegarLoop]: Abstraction has 1968 states and 2649 transitions. [2022-04-06 01:59:30,433 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 14 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 14 states have call predecessors, (36), 14 states have call successors, (36) [2022-04-06 01:59:30,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2649 transitions. [2022-04-06 01:59:30,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-04-06 01:59:30,440 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 01:59:30,440 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 01:59:30,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 01:59:30,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:30,664 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 01:59:30,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 01:59:30,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1188230671, now seen corresponding path program 9 times [2022-04-06 01:59:30,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 01:59:30,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432219616] [2022-04-06 01:59:30,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:30,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 01:59:30,676 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 01:59:30,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780775758] [2022-04-06 01:59:30,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 01:59:30,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:30,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:30,679 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) [2022-04-06 01:59:30,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 01:59:31,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-04-06 01:59:31,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 01:59:31,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 01:59:31,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 01:59:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 84 proven. 248 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-04-06 01:59:31,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 01:59:32,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 84 proven. 248 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-04-06 01:59:32,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 01:59:32,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432219616] [2022-04-06 01:59:32,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 01:59:32,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780775758] [2022-04-06 01:59:32,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780775758] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 01:59:32,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 01:59:32,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-04-06 01:59:32,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215509886] [2022-04-06 01:59:32,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 01:59:32,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 01:59:32,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 01:59:32,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 01:59:32,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-04-06 01:59:32,250 INFO L87 Difference]: Start difference. First operand 1968 states and 2649 transitions. Second operand has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 18 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33) [2022-04-06 01:59:34,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 01:59:34,427 INFO L93 Difference]: Finished difference Result 3252 states and 4395 transitions. [2022-04-06 01:59:34,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 01:59:34,428 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 18 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33) Word has length 187 [2022-04-06 01:59:34,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 01:59:34,438 INFO L225 Difference]: With dead ends: 3252 [2022-04-06 01:59:34,438 INFO L226 Difference]: Without dead ends: 2993 [2022-04-06 01:59:34,440 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 356 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=507, Invalid=2573, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 01:59:34,440 INFO L913 BasicCegarLoop]: 332 mSDtfsCounter, 274 mSDsluCounter, 1680 mSDsCounter, 0 mSdLazyCounter, 2083 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 2012 SdHoareTripleChecker+Invalid, 2278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 2083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 01:59:34,441 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 2012 Invalid, 2278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 2083 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 01:59:34,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2022-04-06 01:59:34,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 2462. [2022-04-06 01:59:34,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 1845 states have (on average 1.1718157181571816) internal successors, (2162), 1887 states have internal predecessors, (2162), 592 states have call successors, (592), 26 states have call predecessors, (592), 24 states have return successors, (590), 548 states have call predecessors, (590), 590 states have call successors, (590) [2022-04-06 01:59:34,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 3344 transitions. [2022-04-06 01:59:34,730 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 3344 transitions. Word has length 187 [2022-04-06 01:59:34,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 01:59:34,730 INFO L478 AbstractCegarLoop]: Abstraction has 2462 states and 3344 transitions. [2022-04-06 01:59:34,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 18 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33) [2022-04-06 01:59:34,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 3344 transitions. [2022-04-06 01:59:34,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-04-06 01:59:34,738 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 01:59:34,738 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 01:59:34,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-04-06 01:59:34,944 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:34,944 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 01:59:34,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 01:59:34,945 INFO L85 PathProgramCache]: Analyzing trace with hash 2070462991, now seen corresponding path program 10 times [2022-04-06 01:59:34,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 01:59:34,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816586623] [2022-04-06 01:59:34,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:34,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 01:59:34,955 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 01:59:34,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509604994] [2022-04-06 01:59:34,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 01:59:34,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:34,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:34,962 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) [2022-04-06 01:59:34,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 01:59:35,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 01:59:35,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 01:59:35,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 01:59:35,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 01:59:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 1044 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 01:59:35,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 01:59:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 284 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-04-06 01:59:36,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 01:59:36,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816586623] [2022-04-06 01:59:36,311 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 01:59:36,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509604994] [2022-04-06 01:59:36,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509604994] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 01:59:36,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 01:59:36,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-04-06 01:59:36,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056219265] [2022-04-06 01:59:36,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 01:59:36,312 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 01:59:36,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 01:59:36,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 01:59:36,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 01:59:36,313 INFO L87 Difference]: Start difference. First operand 2462 states and 3344 transitions. Second operand has 46 states, 46 states have (on average 4.521739130434782) internal successors, (208), 46 states have internal predecessors, (208), 44 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (46), 42 states have call predecessors, (46), 43 states have call successors, (46) [2022-04-06 01:59:39,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 01:59:39,338 INFO L93 Difference]: Finished difference Result 9906 states and 14925 transitions. [2022-04-06 01:59:39,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-04-06 01:59:39,339 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.521739130434782) internal successors, (208), 46 states have internal predecessors, (208), 44 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (46), 42 states have call predecessors, (46), 43 states have call successors, (46) Word has length 187 [2022-04-06 01:59:39,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 01:59:39,371 INFO L225 Difference]: With dead ends: 9906 [2022-04-06 01:59:39,371 INFO L226 Difference]: Without dead ends: 9897 [2022-04-06 01:59:39,375 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2691, Invalid=4619, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 01:59:39,375 INFO L913 BasicCegarLoop]: 153 mSDtfsCounter, 1412 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 990 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1412 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 990 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 01:59:39,376 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1412 Valid, 879 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [990 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 01:59:39,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9897 states. [2022-04-06 01:59:40,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9897 to 9645. [2022-04-06 01:59:40,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9645 states, 7245 states have (on average 1.2641821946169771) internal successors, (9159), 7308 states have internal predecessors, (9159), 2355 states have call successors, (2355), 46 states have call predecessors, (2355), 44 states have return successors, (2353), 2290 states have call predecessors, (2353), 2353 states have call successors, (2353) [2022-04-06 01:59:40,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9645 states to 9645 states and 13867 transitions. [2022-04-06 01:59:40,721 INFO L78 Accepts]: Start accepts. Automaton has 9645 states and 13867 transitions. Word has length 187 [2022-04-06 01:59:40,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 01:59:40,721 INFO L478 AbstractCegarLoop]: Abstraction has 9645 states and 13867 transitions. [2022-04-06 01:59:40,722 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.521739130434782) internal successors, (208), 46 states have internal predecessors, (208), 44 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (46), 42 states have call predecessors, (46), 43 states have call successors, (46) [2022-04-06 01:59:40,722 INFO L276 IsEmpty]: Start isEmpty. Operand 9645 states and 13867 transitions. [2022-04-06 01:59:40,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-04-06 01:59:40,731 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 01:59:40,731 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 10, 10, 10, 10, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 01:59:40,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-04-06 01:59:40,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:40,947 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 01:59:40,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 01:59:40,948 INFO L85 PathProgramCache]: Analyzing trace with hash 179284923, now seen corresponding path program 2 times [2022-04-06 01:59:40,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 01:59:40,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963491250] [2022-04-06 01:59:40,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:40,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 01:59:40,957 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 01:59:40,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030717426] [2022-04-06 01:59:40,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 01:59:40,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:40,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:40,958 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) [2022-04-06 01:59:40,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 01:59:41,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 01:59:41,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 01:59:41,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 01:59:41,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 01:59:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 1142 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 01:59:41,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 01:59:42,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 302 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-04-06 01:59:42,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 01:59:42,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963491250] [2022-04-06 01:59:42,292 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 01:59:42,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030717426] [2022-04-06 01:59:42,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030717426] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 01:59:42,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 01:59:42,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-04-06 01:59:42,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689895551] [2022-04-06 01:59:42,292 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 01:59:42,293 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 01:59:42,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 01:59:42,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 01:59:42,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 01:59:42,295 INFO L87 Difference]: Start difference. First operand 9645 states and 13867 transitions. Second operand has 48 states, 48 states have (on average 4.479166666666667) internal successors, (215), 48 states have internal predecessors, (215), 46 states have call successors, (50), 25 states have call predecessors, (50), 24 states have return successors, (48), 44 states have call predecessors, (48), 45 states have call successors, (48) [2022-04-06 01:59:45,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 01:59:45,091 INFO L93 Difference]: Finished difference Result 14792 states and 21463 transitions. [2022-04-06 01:59:45,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-04-06 01:59:45,092 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.479166666666667) internal successors, (215), 48 states have internal predecessors, (215), 46 states have call successors, (50), 25 states have call predecessors, (50), 24 states have return successors, (48), 44 states have call predecessors, (48), 45 states have call successors, (48) Word has length 193 [2022-04-06 01:59:45,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 01:59:45,116 INFO L225 Difference]: With dead ends: 14792 [2022-04-06 01:59:45,117 INFO L226 Difference]: Without dead ends: 7697 [2022-04-06 01:59:45,136 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2864, Invalid=4968, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 01:59:45,136 INFO L913 BasicCegarLoop]: 159 mSDtfsCounter, 1386 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 995 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1386 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 1738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 995 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 01:59:45,137 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1386 Valid, 1018 Invalid, 1738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [995 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 01:59:45,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7697 states. [2022-04-06 01:59:46,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7697 to 7470. [2022-04-06 01:59:46,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7470 states, 5600 states have (on average 1.1821428571428572) internal successors, (6620), 5644 states have internal predecessors, (6620), 1823 states have call successors, (1823), 48 states have call predecessors, (1823), 46 states have return successors, (1821), 1777 states have call predecessors, (1821), 1821 states have call successors, (1821) [2022-04-06 01:59:46,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7470 states to 7470 states and 10264 transitions. [2022-04-06 01:59:46,124 INFO L78 Accepts]: Start accepts. Automaton has 7470 states and 10264 transitions. Word has length 193 [2022-04-06 01:59:46,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 01:59:46,124 INFO L478 AbstractCegarLoop]: Abstraction has 7470 states and 10264 transitions. [2022-04-06 01:59:46,125 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.479166666666667) internal successors, (215), 48 states have internal predecessors, (215), 46 states have call successors, (50), 25 states have call predecessors, (50), 24 states have return successors, (48), 44 states have call predecessors, (48), 45 states have call successors, (48) [2022-04-06 01:59:46,125 INFO L276 IsEmpty]: Start isEmpty. Operand 7470 states and 10264 transitions. [2022-04-06 01:59:46,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-04-06 01:59:46,132 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 01:59:46,132 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 10, 10, 10, 10, 8, 8, 8, 8, 6, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 01:59:46,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 01:59:46,347 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:46,347 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 01:59:46,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 01:59:46,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1172412185, now seen corresponding path program 2 times [2022-04-06 01:59:46,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 01:59:46,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456480027] [2022-04-06 01:59:46,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:46,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 01:59:46,356 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 01:59:46,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830307849] [2022-04-06 01:59:46,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 01:59:46,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:46,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:46,359 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) [2022-04-06 01:59:46,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 01:59:46,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 01:59:46,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 01:59:46,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 01:59:46,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 01:59:47,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 1248 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 01:59:47,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 01:59:47,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 324 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-04-06 01:59:47,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 01:59:47,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456480027] [2022-04-06 01:59:47,784 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 01:59:47,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830307849] [2022-04-06 01:59:47,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830307849] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 01:59:47,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 01:59:47,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-04-06 01:59:47,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810471228] [2022-04-06 01:59:47,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 01:59:47,784 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 01:59:47,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 01:59:47,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 01:59:47,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 01:59:47,786 INFO L87 Difference]: Start difference. First operand 7470 states and 10264 transitions. Second operand has 50 states, 50 states have (on average 4.44) internal successors, (222), 50 states have internal predecessors, (222), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) [2022-04-06 01:59:50,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 01:59:50,533 INFO L93 Difference]: Finished difference Result 8076 states and 11149 transitions. [2022-04-06 01:59:50,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-04-06 01:59:50,534 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.44) internal successors, (222), 50 states have internal predecessors, (222), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) Word has length 199 [2022-04-06 01:59:50,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 01:59:50,555 INFO L225 Difference]: With dead ends: 8076 [2022-04-06 01:59:50,555 INFO L226 Difference]: Without dead ends: 7927 [2022-04-06 01:59:50,561 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3046, Invalid=5326, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 01:59:50,561 INFO L913 BasicCegarLoop]: 165 mSDtfsCounter, 1526 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 1054 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1526 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1054 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 01:59:50,562 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1526 Valid, 1003 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1054 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 01:59:50,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2022-04-06 01:59:51,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 7220. [2022-04-06 01:59:51,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7220 states, 5413 states have (on average 1.1211897284315537) internal successors, (6069), 5457 states have internal predecessors, (6069), 1758 states have call successors, (1758), 50 states have call predecessors, (1758), 48 states have return successors, (1756), 1712 states have call predecessors, (1756), 1756 states have call successors, (1756) [2022-04-06 01:59:51,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7220 states to 7220 states and 9583 transitions. [2022-04-06 01:59:51,373 INFO L78 Accepts]: Start accepts. Automaton has 7220 states and 9583 transitions. Word has length 199 [2022-04-06 01:59:51,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 01:59:51,373 INFO L478 AbstractCegarLoop]: Abstraction has 7220 states and 9583 transitions. [2022-04-06 01:59:51,373 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.44) internal successors, (222), 50 states have internal predecessors, (222), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) [2022-04-06 01:59:51,374 INFO L276 IsEmpty]: Start isEmpty. Operand 7220 states and 9583 transitions. [2022-04-06 01:59:51,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-04-06 01:59:51,396 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 01:59:51,396 INFO L499 BasicCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 01:59:51,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 01:59:51,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:51,611 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 01:59:51,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 01:59:51,612 INFO L85 PathProgramCache]: Analyzing trace with hash -2044709741, now seen corresponding path program 11 times [2022-04-06 01:59:51,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 01:59:51,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62272193] [2022-04-06 01:59:51,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 01:59:51,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 01:59:51,679 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 01:59:51,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600328894] [2022-04-06 01:59:51,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 01:59:51,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 01:59:51,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 01:59:51,689 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) [2022-04-06 01:59:51,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 01:59:52,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-04-06 01:59:52,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 01:59:52,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 01:59:52,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 02:00:11,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5272 backedges. 480 proven. 988 refuted. 4 times theorem prover too weak. 3800 trivial. 0 not checked. [2022-04-06 02:00:11,182 INFO L328 TraceCheckSpWp]: Computing backward predicates...