/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 16:26:57,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 16:26:57,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 16:26:57,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 16:26:57,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 16:26:57,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 16:26:57,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 16:26:57,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 16:26:57,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 16:26:57,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 16:26:57,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 16:26:57,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 16:26:57,629 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 16:26:57,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 16:26:57,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 16:26:57,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 16:26:57,634 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 16:26:57,636 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 16:26:57,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 16:26:57,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 16:26:57,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 16:26:57,646 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 16:26:57,657 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 16:26:57,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 16:26:57,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 16:26:57,658 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 16:26:57,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 16:26:57,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 16:26:57,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 16:26:57,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 16:26:57,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 16:26:57,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 16:26:57,660 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 16:26:57,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 16:26:57,660 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 16:26:57,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 16:26:57,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 16:26:57,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 16:26:57,660 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 16:26:57,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 16:26:57,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:26:57,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 16:26:57,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 16:26:57,661 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 16:26:57,661 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 16:26:57,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 16:26:57,661 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 16:26:57,661 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 16:26:57,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 16:26:57,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 16:26:57,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 16:26:57,900 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 16:26:57,903 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 16:26:57,904 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound5.c [2022-04-06 16:26:57,968 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66744fbb7/020b320b1fcf46978ab9157977522c29/FLAGed1cd7455 [2022-04-06 16:26:58,371 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 16:26:58,372 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound5.c [2022-04-06 16:26:58,379 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66744fbb7/020b320b1fcf46978ab9157977522c29/FLAGed1cd7455 [2022-04-06 16:26:58,769 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66744fbb7/020b320b1fcf46978ab9157977522c29 [2022-04-06 16:26:58,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 16:26:58,772 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 16:26:58,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 16:26:58,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 16:26:58,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 16:26:58,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:26:58" (1/1) ... [2022-04-06 16:26:58,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b2ff2e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:26:58, skipping insertion in model container [2022-04-06 16:26:58,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:26:58" (1/1) ... [2022-04-06 16:26:58,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 16:26:58,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 16:26:58,941 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound5.c[489,502] [2022-04-06 16:26:58,955 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:26:58,961 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 16:26:58,969 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound5.c[489,502] [2022-04-06 16:26:58,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:26:58,985 INFO L208 MainTranslator]: Completed translation [2022-04-06 16:26:58,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:26:58 WrapperNode [2022-04-06 16:26:58,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 16:26:58,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 16:26:58,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 16:26:58,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 16:26:58,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:26:58" (1/1) ... [2022-04-06 16:26:58,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:26:58" (1/1) ... [2022-04-06 16:26:59,000 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:26:58" (1/1) ... [2022-04-06 16:26:59,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:26:58" (1/1) ... [2022-04-06 16:26:59,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:26:58" (1/1) ... [2022-04-06 16:26:59,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:26:58" (1/1) ... [2022-04-06 16:26:59,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:26:58" (1/1) ... [2022-04-06 16:26:59,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 16:26:59,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 16:26:59,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 16:26:59,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 16:26:59,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:26:58" (1/1) ... [2022-04-06 16:26:59,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:26:59,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:59,034 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 16:26:59,049 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 16:26:59,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 16:26:59,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 16:26:59,071 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 16:26:59,072 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 16:26:59,072 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 16:26:59,072 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 16:26:59,072 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 16:26:59,072 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 16:26:59,072 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 16:26:59,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 16:26:59,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 16:26:59,072 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 16:26:59,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 16:26:59,073 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 16:26:59,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 16:26:59,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 16:26:59,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 16:26:59,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 16:26:59,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 16:26:59,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 16:26:59,127 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 16:26:59,128 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 16:26:59,284 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 16:26:59,290 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 16:26:59,291 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 16:26:59,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:26:59 BoogieIcfgContainer [2022-04-06 16:26:59,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 16:26:59,293 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 16:26:59,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 16:26:59,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 16:26:59,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 04:26:58" (1/3) ... [2022-04-06 16:26:59,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b599392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:26:59, skipping insertion in model container [2022-04-06 16:26:59,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:26:58" (2/3) ... [2022-04-06 16:26:59,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b599392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:26:59, skipping insertion in model container [2022-04-06 16:26:59,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:26:59" (3/3) ... [2022-04-06 16:26:59,311 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound5.c [2022-04-06 16:26:59,315 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 16:26:59,315 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 16:26:59,361 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 16:26:59,384 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 16:26:59,384 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 16:26:59,396 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 16:26:59,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 16:26:59,403 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:59,403 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:59,404 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:59,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:59,408 INFO L85 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 1 times [2022-04-06 16:26:59,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:59,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [608404906] [2022-04-06 16:26:59,424 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:59,424 INFO L85 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 2 times [2022-04-06 16:26:59,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:59,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969672949] [2022-04-06 16:26:59,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:59,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:26:59,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 16:26:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:26:59,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 16:26:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:26:59,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 16:26:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:26:59,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 16:26:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:26:59,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 16:26:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:26:59,634 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:26:59,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:59,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969672949] [2022-04-06 16:26:59,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969672949] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:59,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:59,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:26:59,637 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:59,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [608404906] [2022-04-06 16:26:59,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [608404906] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:59,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:59,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:26:59,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776967850] [2022-04-06 16:26:59,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:59,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 16:26:59,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:59,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 16:26:59,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:26:59,667 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:26:59,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:59,737 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2022-04-06 16:26:59,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 16:26:59,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-04-06 16:26:59,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:59,745 INFO L225 Difference]: With dead ends: 67 [2022-04-06 16:26:59,745 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 16:26:59,748 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:26:59,751 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:59,752 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:26:59,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 16:26:59,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 16:26:59,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 16:26:59,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-04-06 16:26:59,790 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2022-04-06 16:26:59,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:59,790 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-04-06 16:26:59,790 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:26:59,791 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-04-06 16:26:59,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 16:26:59,792 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:59,792 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:59,792 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 16:26:59,792 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:59,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:59,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 1 times [2022-04-06 16:26:59,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:59,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [795673699] [2022-04-06 16:26:59,794 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:59,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 2 times [2022-04-06 16:26:59,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:59,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388805617] [2022-04-06 16:26:59,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:59,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:59,814 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:59,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379238766] [2022-04-06 16:26:59,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:26:59,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:59,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:59,816 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 16:26:59,817 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 16:26:59,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 16:26:59,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:59,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:26:59,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:59,979 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:26:59,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:26:59,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:59,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388805617] [2022-04-06 16:26:59,980 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:59,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379238766] [2022-04-06 16:26:59,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379238766] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:59,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:59,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:26:59,981 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:59,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [795673699] [2022-04-06 16:26:59,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [795673699] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:59,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:59,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:26:59,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567503225] [2022-04-06 16:26:59,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:59,983 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:26:59,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:59,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:26:59,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:26:59,984 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 16:27:00,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:27:00,034 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2022-04-06 16:27:00,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:27:00,034 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-04-06 16:27:00,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:27:00,036 INFO L225 Difference]: With dead ends: 48 [2022-04-06 16:27:00,036 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 16:27:00,036 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:27:00,037 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:27:00,038 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 143 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:27:00,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 16:27:00,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-04-06 16:27:00,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 16:27:00,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2022-04-06 16:27:00,050 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2022-04-06 16:27:00,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:27:00,051 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2022-04-06 16:27:00,051 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 16:27:00,051 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2022-04-06 16:27:00,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 16:27:00,052 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:27:00,052 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:27:00,078 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 16:27:00,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:00,275 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:27:00,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:27:00,276 INFO L85 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 1 times [2022-04-06 16:27:00,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:00,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [39180714] [2022-04-06 16:27:00,277 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:27:00,277 INFO L85 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 2 times [2022-04-06 16:27:00,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:27:00,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322941287] [2022-04-06 16:27:00,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:27:00,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:27:00,301 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:27:00,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457529094] [2022-04-06 16:27:00,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:27:00,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:00,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:27:00,305 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 16:27:00,314 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 16:27:00,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:27:00,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:27:00,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:27:00,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:27:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:27:00,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:27:00,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:27:00,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322941287] [2022-04-06 16:27:00,497 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:27:00,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457529094] [2022-04-06 16:27:00,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457529094] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:27:00,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:27:00,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:27:00,498 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:27:00,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [39180714] [2022-04-06 16:27:00,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [39180714] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:27:00,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:27:00,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:27:00,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467538671] [2022-04-06 16:27:00,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:27:00,500 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:27:00,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:00,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:27:00,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:27:00,501 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 16:27:00,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:27:00,569 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2022-04-06 16:27:00,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:27:00,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-04-06 16:27:00,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:27:00,572 INFO L225 Difference]: With dead ends: 52 [2022-04-06 16:27:00,572 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 16:27:00,573 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:27:00,574 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:27:00,575 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 140 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:27:00,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 16:27:00,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-04-06 16:27:00,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 16:27:00,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2022-04-06 16:27:00,588 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 38 [2022-04-06 16:27:00,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:27:00,588 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2022-04-06 16:27:00,588 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 16:27:00,589 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2022-04-06 16:27:00,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 16:27:00,589 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:27:00,590 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:27:00,611 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 16:27:00,803 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 16:27:00,804 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:27:00,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:27:00,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 1 times [2022-04-06 16:27:00,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:00,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [372757377] [2022-04-06 16:27:00,805 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:27:00,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 2 times [2022-04-06 16:27:00,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:27:00,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647632191] [2022-04-06 16:27:00,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:27:00,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:27:00,819 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:27:00,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732137380] [2022-04-06 16:27:00,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:27:00,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:00,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:27:00,821 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 16:27:00,827 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 16:27:00,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:27:00,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:27:00,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:27:00,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:27:01,003 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 16:27:01,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:27:01,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:27:01,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647632191] [2022-04-06 16:27:01,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:27:01,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732137380] [2022-04-06 16:27:01,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732137380] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:27:01,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:27:01,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:27:01,004 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:27:01,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [372757377] [2022-04-06 16:27:01,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [372757377] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:27:01,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:27:01,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:27:01,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185141579] [2022-04-06 16:27:01,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:27:01,006 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:27:01,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:01,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:27:01,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:27:01,006 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:27:01,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:27:01,060 INFO L93 Difference]: Finished difference Result 74 states and 105 transitions. [2022-04-06 16:27:01,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:27:01,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-04-06 16:27:01,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:27:01,063 INFO L225 Difference]: With dead ends: 74 [2022-04-06 16:27:01,063 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 16:27:01,064 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:27:01,065 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:27:01,065 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 139 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:27:01,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 16:27:01,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-04-06 16:27:01,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 37 states have internal predecessors, (42), 30 states have call successors, (30), 7 states have call predecessors, (30), 6 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 16:27:01,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2022-04-06 16:27:01,079 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 43 [2022-04-06 16:27:01,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:27:01,079 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2022-04-06 16:27:01,080 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:27:01,080 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2022-04-06 16:27:01,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 16:27:01,081 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:27:01,081 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:27:01,104 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 16:27:01,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:01,304 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:27:01,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:27:01,304 INFO L85 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 1 times [2022-04-06 16:27:01,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:01,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [588313938] [2022-04-06 16:27:01,305 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:27:01,305 INFO L85 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 2 times [2022-04-06 16:27:01,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:27:01,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707406758] [2022-04-06 16:27:01,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:27:01,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:27:01,327 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:27:01,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [280361810] [2022-04-06 16:27:01,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:27:01,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:01,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:27:01,331 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 16:27:01,360 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 16:27:01,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:27:01,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:27:01,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 16:27:01,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:27:01,462 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 16:27:01,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:27:01,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:27:01,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707406758] [2022-04-06 16:27:01,465 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:27:01,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280361810] [2022-04-06 16:27:01,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280361810] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:27:01,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:27:01,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:27:01,466 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:27:01,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [588313938] [2022-04-06 16:27:01,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [588313938] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:27:01,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:27:01,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:27:01,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129605877] [2022-04-06 16:27:01,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:27:01,467 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:27:01,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:01,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:27:01,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:27:01,468 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 16:27:01,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:27:01,508 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2022-04-06 16:27:01,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:27:01,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2022-04-06 16:27:01,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:27:01,512 INFO L225 Difference]: With dead ends: 76 [2022-04-06 16:27:01,512 INFO L226 Difference]: Without dead ends: 74 [2022-04-06 16:27:01,512 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:27:01,516 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:27:01,516 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 139 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:27:01,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-06 16:27:01,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-04-06 16:27:01,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 36 states have (on average 1.25) internal successors, (45), 40 states have internal predecessors, (45), 30 states have call successors, (30), 8 states have call predecessors, (30), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 16:27:01,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 101 transitions. [2022-04-06 16:27:01,547 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 101 transitions. Word has length 49 [2022-04-06 16:27:01,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:27:01,547 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 101 transitions. [2022-04-06 16:27:01,547 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 16:27:01,547 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 101 transitions. [2022-04-06 16:27:01,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 16:27:01,551 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:27:01,551 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:27:01,570 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 16:27:01,754 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:01,754 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:27:01,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:27:01,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1164909737, now seen corresponding path program 1 times [2022-04-06 16:27:01,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:01,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1275962730] [2022-04-06 16:27:01,756 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:27:01,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1164909737, now seen corresponding path program 2 times [2022-04-06 16:27:01,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:27:01,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633922572] [2022-04-06 16:27:01,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:27:01,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:27:01,768 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:27:01,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003146638] [2022-04-06 16:27:01,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:27:01,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:01,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:27:01,769 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 16:27:01,802 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 16:27:01,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:27:01,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:27:01,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 16:27:01,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:27:01,959 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 16:27:01,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:27:01,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:27:01,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633922572] [2022-04-06 16:27:01,959 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:27:01,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003146638] [2022-04-06 16:27:01,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003146638] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:27:01,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:27:01,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:27:01,960 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:27:01,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1275962730] [2022-04-06 16:27:01,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1275962730] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:27:01,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:27:01,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:27:01,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142213174] [2022-04-06 16:27:01,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:27:01,961 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:27:01,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:01,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:27:01,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:27:01,961 INFO L87 Difference]: Start difference. First operand 74 states and 101 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 16:27:02,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:27:02,008 INFO L93 Difference]: Finished difference Result 84 states and 109 transitions. [2022-04-06 16:27:02,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:27:02,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-04-06 16:27:02,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:27:02,012 INFO L225 Difference]: With dead ends: 84 [2022-04-06 16:27:02,012 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 16:27:02,013 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:27:02,013 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:27:02,014 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 146 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:27:02,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 16:27:02,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-04-06 16:27:02,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 16:27:02,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2022-04-06 16:27:02,023 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2022-04-06 16:27:02,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:27:02,024 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2022-04-06 16:27:02,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 16:27:02,024 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2022-04-06 16:27:02,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 16:27:02,025 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:27:02,025 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:27:02,050 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 16:27:02,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:02,248 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:27:02,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:27:02,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 1 times [2022-04-06 16:27:02,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:02,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1704557158] [2022-04-06 16:27:02,249 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:27:02,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 2 times [2022-04-06 16:27:02,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:27:02,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329750042] [2022-04-06 16:27:02,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:27:02,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:27:02,266 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:27:02,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209139849] [2022-04-06 16:27:02,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:27:02,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:02,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:27:02,271 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 16:27:02,293 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 16:27:02,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:27:02,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:27:02,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 16:27:02,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:27:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 16:27:02,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:27:02,602 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 16:27:02,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:27:02,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329750042] [2022-04-06 16:27:02,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:27:02,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209139849] [2022-04-06 16:27:02,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209139849] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:27:02,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:27:02,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 16:27:02,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:27:02,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1704557158] [2022-04-06 16:27:02,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1704557158] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:27:02,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:27:02,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:27:02,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128323818] [2022-04-06 16:27:02,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:27:02,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:27:02,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:02,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:27:02,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:27:02,604 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 16:27:02,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:27:02,713 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2022-04-06 16:27:02,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:27:02,713 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2022-04-06 16:27:02,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:27:02,715 INFO L225 Difference]: With dead ends: 88 [2022-04-06 16:27:02,715 INFO L226 Difference]: Without dead ends: 84 [2022-04-06 16:27:02,715 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:27:02,716 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 14 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:27:02,716 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 129 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:27:02,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-04-06 16:27:02,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-04-06 16:27:02,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 16:27:02,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2022-04-06 16:27:02,750 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2022-04-06 16:27:02,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:27:02,750 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2022-04-06 16:27:02,750 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 16:27:02,750 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2022-04-06 16:27:02,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 16:27:02,751 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:27:02,751 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:27:02,776 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 16:27:02,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:02,968 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:27:02,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:27:02,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 3 times [2022-04-06 16:27:02,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:02,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [958128742] [2022-04-06 16:27:02,969 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:27:02,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 4 times [2022-04-06 16:27:02,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:27:02,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146442498] [2022-04-06 16:27:02,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:27:02,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:27:02,985 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:27:02,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057757123] [2022-04-06 16:27:02,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:27:02,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:02,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:27:02,989 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 16:27:02,990 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 16:27:03,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:27:03,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:27:03,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 16:27:03,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:27:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 16:27:03,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:27:03,418 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 16:27:03,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:27:03,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146442498] [2022-04-06 16:27:03,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:27:03,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057757123] [2022-04-06 16:27:03,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057757123] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:27:03,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:27:03,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-04-06 16:27:03,419 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:27:03,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [958128742] [2022-04-06 16:27:03,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [958128742] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:27:03,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:27:03,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:27:03,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065588670] [2022-04-06 16:27:03,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:27:03,420 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:27:03,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:03,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:27:03,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-04-06 16:27:03,421 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 16:27:03,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:27:03,569 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2022-04-06 16:27:03,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:27:03,570 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2022-04-06 16:27:03,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:27:03,571 INFO L225 Difference]: With dead ends: 118 [2022-04-06 16:27:03,571 INFO L226 Difference]: Without dead ends: 116 [2022-04-06 16:27:03,571 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-04-06 16:27:03,572 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 21 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:27:03,572 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 174 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:27:03,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-06 16:27:03,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2022-04-06 16:27:03,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 16:27:03,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2022-04-06 16:27:03,591 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2022-04-06 16:27:03,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:27:03,592 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2022-04-06 16:27:03,592 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 16:27:03,592 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2022-04-06 16:27:03,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 16:27:03,593 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:27:03,593 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:27:03,619 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 16:27:03,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:03,812 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:27:03,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:27:03,812 INFO L85 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 1 times [2022-04-06 16:27:03,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:03,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [167888385] [2022-04-06 16:27:03,813 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:27:03,813 INFO L85 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 2 times [2022-04-06 16:27:03,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:27:03,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866279838] [2022-04-06 16:27:03,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:27:03,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:27:03,822 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:27:03,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505010763] [2022-04-06 16:27:03,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:27:03,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:03,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:27:03,828 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 16:27:03,829 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 16:27:03,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:27:03,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:27:03,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 16:27:03,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:27:04,094 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 16:27:04,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:27:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 16:27:04,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:27:04,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866279838] [2022-04-06 16:27:04,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:27:04,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505010763] [2022-04-06 16:27:04,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505010763] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:27:04,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:27:04,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 16:27:04,227 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:27:04,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [167888385] [2022-04-06 16:27:04,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [167888385] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:27:04,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:27:04,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 16:27:04,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045146638] [2022-04-06 16:27:04,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:27:04,228 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 16:27:04,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:04,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 16:27:04,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 16:27:04,229 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 16:27:04,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:27:04,358 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2022-04-06 16:27:04,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:27:04,360 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 61 [2022-04-06 16:27:04,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:27:04,361 INFO L225 Difference]: With dead ends: 137 [2022-04-06 16:27:04,361 INFO L226 Difference]: Without dead ends: 131 [2022-04-06 16:27:04,362 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:27:04,362 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:27:04,362 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 160 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:27:04,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-04-06 16:27:04,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-04-06 16:27:04,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 42 states have call successors, (42), 16 states have call predecessors, (42), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2022-04-06 16:27:04,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2022-04-06 16:27:04,385 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2022-04-06 16:27:04,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:27:04,385 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2022-04-06 16:27:04,385 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 16:27:04,385 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2022-04-06 16:27:04,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 16:27:04,386 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:27:04,386 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:27:04,411 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 16:27:04,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-06 16:27:04,608 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:27:04,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:27:04,608 INFO L85 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 1 times [2022-04-06 16:27:04,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:04,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [858606388] [2022-04-06 16:27:04,609 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:27:04,609 INFO L85 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 2 times [2022-04-06 16:27:04,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:27:04,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079784201] [2022-04-06 16:27:04,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:27:04,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:27:04,618 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:27:04,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [79147171] [2022-04-06 16:27:04,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:27:04,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:04,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:27:04,624 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 16:27:04,628 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 16:27:04,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:27:04,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:27:04,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 16:27:04,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:27:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 16:27:04,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:27:05,058 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-04-06 16:27:05,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:27:05,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079784201] [2022-04-06 16:27:05,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:27:05,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79147171] [2022-04-06 16:27:05,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79147171] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 16:27:05,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:27:05,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-04-06 16:27:05,059 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:27:05,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [858606388] [2022-04-06 16:27:05,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [858606388] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:27:05,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:27:05,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:27:05,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929193965] [2022-04-06 16:27:05,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:27:05,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:27:05,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:05,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:27:05,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 16:27:05,060 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 16:27:05,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:27:05,123 INFO L93 Difference]: Finished difference Result 137 states and 172 transitions. [2022-04-06 16:27:05,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:27:05,124 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 69 [2022-04-06 16:27:05,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:27:05,125 INFO L225 Difference]: With dead ends: 137 [2022-04-06 16:27:05,125 INFO L226 Difference]: Without dead ends: 132 [2022-04-06 16:27:05,125 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:27:05,126 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:27:05,126 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 116 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:27:05,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-06 16:27:05,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-04-06 16:27:05,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 79 states have internal predecessors, (88), 39 states have call successors, (39), 17 states have call predecessors, (39), 16 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2022-04-06 16:27:05,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 164 transitions. [2022-04-06 16:27:05,144 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 164 transitions. Word has length 69 [2022-04-06 16:27:05,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:27:05,144 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 164 transitions. [2022-04-06 16:27:05,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 16:27:05,144 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 164 transitions. [2022-04-06 16:27:05,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 16:27:05,145 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:27:05,145 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:27:05,171 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 16:27:05,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 16:27:05,368 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:27:05,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:27:05,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 5 times [2022-04-06 16:27:05,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:05,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [33022557] [2022-04-06 16:27:05,368 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:27:05,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 6 times [2022-04-06 16:27:05,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:27:05,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240044396] [2022-04-06 16:27:05,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:27:05,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:27:05,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:27:05,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184689781] [2022-04-06 16:27:05,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:27:05,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:05,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:27:05,380 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 16:27:05,383 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 16:27:05,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:27:05,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:27:05,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 16:27:05,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:27:06,275 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 16:27:06,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:27:06,871 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:27:09,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:27:09,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240044396] [2022-04-06 16:27:09,471 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:27:09,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184689781] [2022-04-06 16:27:09,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184689781] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:27:09,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:27:09,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-04-06 16:27:09,472 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:27:09,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [33022557] [2022-04-06 16:27:09,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [33022557] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:27:09,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:27:09,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 16:27:09,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126451382] [2022-04-06 16:27:09,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:27:09,473 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 16:27:09,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:09,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 16:27:09,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-04-06 16:27:09,474 INFO L87 Difference]: Start difference. First operand 132 states and 164 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-04-06 16:27:10,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:27:10,175 INFO L93 Difference]: Finished difference Result 162 states and 204 transitions. [2022-04-06 16:27:10,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 16:27:10,176 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 74 [2022-04-06 16:27:10,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:27:10,178 INFO L225 Difference]: With dead ends: 162 [2022-04-06 16:27:10,178 INFO L226 Difference]: Without dead ends: 160 [2022-04-06 16:27:10,178 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-04-06 16:27:10,179 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 31 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 16:27:10,179 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 186 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 527 Invalid, 0 Unknown, 68 Unchecked, 0.6s Time] [2022-04-06 16:27:10,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-04-06 16:27:10,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 142. [2022-04-06 16:27:10,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 85 states have internal predecessors, (95), 42 states have call successors, (42), 18 states have call predecessors, (42), 17 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 16:27:10,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 177 transitions. [2022-04-06 16:27:10,199 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 177 transitions. Word has length 74 [2022-04-06 16:27:10,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:27:10,200 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 177 transitions. [2022-04-06 16:27:10,200 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-04-06 16:27:10,200 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 177 transitions. [2022-04-06 16:27:10,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 16:27:10,201 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:27:10,201 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:27:10,229 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 16:27:10,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 16:27:10,415 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:27:10,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:27:10,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 3 times [2022-04-06 16:27:10,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:10,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1180427464] [2022-04-06 16:27:10,416 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:27:10,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 4 times [2022-04-06 16:27:10,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:27:10,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798239090] [2022-04-06 16:27:10,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:27:10,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:27:10,426 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:27:10,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1352465272] [2022-04-06 16:27:10,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:27:10,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:10,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:27:10,427 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 16:27:10,448 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 16:27:10,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:27:10,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:27:10,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 16:27:10,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:27:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 16:27:11,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:27:11,549 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 16:27:11,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:27:11,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798239090] [2022-04-06 16:27:11,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:27:11,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352465272] [2022-04-06 16:27:11,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352465272] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:27:11,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:27:11,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2022-04-06 16:27:11,551 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:27:11,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1180427464] [2022-04-06 16:27:11,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1180427464] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:27:11,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:27:11,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:27:11,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748568978] [2022-04-06 16:27:11,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:27:11,551 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:27:11,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:11,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:27:11,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-04-06 16:27:11,552 INFO L87 Difference]: Start difference. First operand 142 states and 177 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 16:27:12,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:27:12,023 INFO L93 Difference]: Finished difference Result 180 states and 222 transitions. [2022-04-06 16:27:12,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 16:27:12,024 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2022-04-06 16:27:12,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:27:12,025 INFO L225 Difference]: With dead ends: 180 [2022-04-06 16:27:12,025 INFO L226 Difference]: Without dead ends: 178 [2022-04-06 16:27:12,026 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-04-06 16:27:12,026 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 26 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:27:12,026 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 147 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:27:12,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-04-06 16:27:12,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 164. [2022-04-06 16:27:12,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 97 states have (on average 1.1443298969072164) internal successors, (111), 100 states have internal predecessors, (111), 45 states have call successors, (45), 22 states have call predecessors, (45), 21 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2022-04-06 16:27:12,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 199 transitions. [2022-04-06 16:27:12,051 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 199 transitions. Word has length 74 [2022-04-06 16:27:12,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:27:12,051 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 199 transitions. [2022-04-06 16:27:12,051 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 16:27:12,051 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 199 transitions. [2022-04-06 16:27:12,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 16:27:12,052 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:27:12,052 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:27:12,075 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 16:27:12,267 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 16:27:12,267 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:27:12,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:27:12,268 INFO L85 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 5 times [2022-04-06 16:27:12,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:12,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [533549617] [2022-04-06 16:27:12,268 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:27:12,269 INFO L85 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 6 times [2022-04-06 16:27:12,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:27:12,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484581154] [2022-04-06 16:27:12,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:27:12,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:27:12,276 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:27:12,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829039596] [2022-04-06 16:27:12,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:27:12,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:12,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:27:12,292 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 16:27:12,294 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 16:27:12,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:27:12,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:27:12,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 16:27:12,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:27:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-04-06 16:27:12,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:27:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 27 proven. 14 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-04-06 16:27:12,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:27:12,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484581154] [2022-04-06 16:27:12,761 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:27:12,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829039596] [2022-04-06 16:27:12,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829039596] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:27:12,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:27:12,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-04-06 16:27:12,762 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:27:12,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [533549617] [2022-04-06 16:27:12,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [533549617] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:27:12,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:27:12,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:27:12,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005512830] [2022-04-06 16:27:12,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:27:12,763 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:27:12,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:12,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:27:12,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 16:27:12,763 INFO L87 Difference]: Start difference. First operand 164 states and 199 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 16:27:13,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:27:13,063 INFO L93 Difference]: Finished difference Result 178 states and 218 transitions. [2022-04-06 16:27:13,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:27:13,064 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 79 [2022-04-06 16:27:13,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:27:13,065 INFO L225 Difference]: With dead ends: 178 [2022-04-06 16:27:13,065 INFO L226 Difference]: Without dead ends: 165 [2022-04-06 16:27:13,065 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-04-06 16:27:13,066 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 14 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:27:13,066 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 151 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:27:13,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-04-06 16:27:13,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 145. [2022-04-06 16:27:13,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 92 states have internal predecessors, (96), 36 states have call successors, (36), 21 states have call predecessors, (36), 20 states have return successors, (35), 31 states have call predecessors, (35), 35 states have call successors, (35) [2022-04-06 16:27:13,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 167 transitions. [2022-04-06 16:27:13,088 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 167 transitions. Word has length 79 [2022-04-06 16:27:13,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:27:13,088 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 167 transitions. [2022-04-06 16:27:13,088 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 16:27:13,088 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 167 transitions. [2022-04-06 16:27:13,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 16:27:13,089 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:27:13,089 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:27:13,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-04-06 16:27:13,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 16:27:13,299 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:27:13,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:27:13,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 3 times [2022-04-06 16:27:13,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:13,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1824186598] [2022-04-06 16:27:13,300 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:27:13,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 4 times [2022-04-06 16:27:13,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:27:13,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523057330] [2022-04-06 16:27:13,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:27:13,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:27:13,317 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:27:13,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936578364] [2022-04-06 16:27:13,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:27:13,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:13,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:27:13,318 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 16:27:13,338 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 16:27:13,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:27:13,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:27:13,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 16:27:13,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:27:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 38 proven. 37 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 16:27:13,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:27:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 40 proven. 26 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 16:27:14,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:27:14,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523057330] [2022-04-06 16:27:14,037 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:27:14,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936578364] [2022-04-06 16:27:14,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936578364] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:27:14,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:27:14,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-04-06 16:27:14,038 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:27:14,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1824186598] [2022-04-06 16:27:14,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1824186598] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:27:14,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:27:14,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:27:14,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031778357] [2022-04-06 16:27:14,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:27:14,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:27:14,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:14,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:27:14,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:27:14,040 INFO L87 Difference]: Start difference. First operand 145 states and 167 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 16:27:14,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:27:14,354 INFO L93 Difference]: Finished difference Result 167 states and 195 transitions. [2022-04-06 16:27:14,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:27:14,354 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2022-04-06 16:27:14,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:27:14,355 INFO L225 Difference]: With dead ends: 167 [2022-04-06 16:27:14,355 INFO L226 Difference]: Without dead ends: 165 [2022-04-06 16:27:14,356 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-04-06 16:27:14,356 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:27:14,356 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 125 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:27:14,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-04-06 16:27:14,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 155. [2022-04-06 16:27:14,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 94 states have (on average 1.0957446808510638) internal successors, (103), 98 states have internal predecessors, (103), 39 states have call successors, (39), 22 states have call predecessors, (39), 21 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2022-04-06 16:27:14,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 180 transitions. [2022-04-06 16:27:14,380 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 180 transitions. Word has length 79 [2022-04-06 16:27:14,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:27:14,380 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 180 transitions. [2022-04-06 16:27:14,380 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 16:27:14,380 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 180 transitions. [2022-04-06 16:27:14,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-04-06 16:27:14,381 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:27:14,381 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:27:14,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-04-06 16:27:14,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 16:27:14,591 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:27:14,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:27:14,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 7 times [2022-04-06 16:27:14,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:14,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [807040293] [2022-04-06 16:27:14,592 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:27:14,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 8 times [2022-04-06 16:27:14,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:27:14,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464655542] [2022-04-06 16:27:14,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:27:14,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:27:14,605 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:27:14,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688845887] [2022-04-06 16:27:14,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:27:14,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:14,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:27:14,607 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 16:27:14,615 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 16:27:14,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:27:14,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:27:14,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 16:27:14,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:27:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 63 proven. 44 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 16:27:16,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:27:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-04-06 16:27:17,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:27:17,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464655542] [2022-04-06 16:27:17,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:27:17,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688845887] [2022-04-06 16:27:17,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688845887] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:27:17,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:27:17,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 21 [2022-04-06 16:27:17,185 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:27:17,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [807040293] [2022-04-06 16:27:17,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [807040293] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:27:17,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:27:17,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 16:27:17,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037372865] [2022-04-06 16:27:17,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:27:17,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 16:27:17,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:17,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 16:27:17,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-04-06 16:27:17,186 INFO L87 Difference]: Start difference. First operand 155 states and 180 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-04-06 16:27:19,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:27:19,043 INFO L93 Difference]: Finished difference Result 183 states and 217 transitions. [2022-04-06 16:27:19,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 16:27:19,045 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 92 [2022-04-06 16:27:19,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:27:19,046 INFO L225 Difference]: With dead ends: 183 [2022-04-06 16:27:19,047 INFO L226 Difference]: Without dead ends: 181 [2022-04-06 16:27:19,047 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 162 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-04-06 16:27:19,047 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 24 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 16:27:19,048 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 173 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 513 Invalid, 0 Unknown, 5 Unchecked, 1.8s Time] [2022-04-06 16:27:19,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-04-06 16:27:19,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2022-04-06 16:27:19,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 107 states have (on average 1.102803738317757) internal successors, (118), 112 states have internal predecessors, (118), 48 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (47), 42 states have call predecessors, (47), 47 states have call successors, (47) [2022-04-06 16:27:19,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 213 transitions. [2022-04-06 16:27:19,082 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 213 transitions. Word has length 92 [2022-04-06 16:27:19,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:27:19,083 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 213 transitions. [2022-04-06 16:27:19,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-04-06 16:27:19,083 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 213 transitions. [2022-04-06 16:27:19,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-04-06 16:27:19,084 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:27:19,084 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:27:19,107 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 16:27:19,302 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:19,303 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:27:19,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:27:19,303 INFO L85 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 9 times [2022-04-06 16:27:19,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:19,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [313389643] [2022-04-06 16:27:19,304 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:27:19,304 INFO L85 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 10 times [2022-04-06 16:27:19,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:27:19,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533636378] [2022-04-06 16:27:19,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:27:19,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:27:19,312 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:27:19,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45684323] [2022-04-06 16:27:19,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:27:19,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:19,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:27:19,314 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 16:27:19,316 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 16:27:19,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:27:19,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:27:19,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 16:27:19,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:27:20,832 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-04-06 16:27:20,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:27:21,650 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:27:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-04-06 16:27:21,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:27:21,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533636378] [2022-04-06 16:27:21,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:27:21,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45684323] [2022-04-06 16:27:21,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45684323] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:27:21,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:27:21,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-04-06 16:27:21,711 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:27:21,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [313389643] [2022-04-06 16:27:21,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [313389643] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:27:21,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:27:21,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 16:27:21,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453957560] [2022-04-06 16:27:21,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:27:21,712 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 16:27:21,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:21,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 16:27:21,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-04-06 16:27:21,712 INFO L87 Difference]: Start difference. First operand 179 states and 213 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-04-06 16:27:22,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:27:22,299 INFO L93 Difference]: Finished difference Result 208 states and 249 transitions. [2022-04-06 16:27:22,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:27:22,299 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2022-04-06 16:27:22,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:27:22,301 INFO L225 Difference]: With dead ends: 208 [2022-04-06 16:27:22,301 INFO L226 Difference]: Without dead ends: 206 [2022-04-06 16:27:22,301 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-04-06 16:27:22,301 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 13 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:27:22,302 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 234 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 16:27:22,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-04-06 16:27:22,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 196. [2022-04-06 16:27:22,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 118 states have (on average 1.1101694915254237) internal successors, (131), 122 states have internal predecessors, (131), 52 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (51), 47 states have call predecessors, (51), 51 states have call successors, (51) [2022-04-06 16:27:22,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 234 transitions. [2022-04-06 16:27:22,344 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 234 transitions. Word has length 92 [2022-04-06 16:27:22,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:27:22,345 INFO L478 AbstractCegarLoop]: Abstraction has 196 states and 234 transitions. [2022-04-06 16:27:22,345 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-04-06 16:27:22,345 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 234 transitions. [2022-04-06 16:27:22,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-04-06 16:27:22,346 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:27:22,346 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:27:22,371 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 16:27:22,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 16:27:22,559 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:27:22,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:27:22,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 11 times [2022-04-06 16:27:22,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:22,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [500053359] [2022-04-06 16:27:22,560 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:27:22,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 12 times [2022-04-06 16:27:22,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:27:22,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083972504] [2022-04-06 16:27:22,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:27:22,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:27:22,567 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:27:22,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123663993] [2022-04-06 16:27:22,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:27:22,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:22,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:27:22,569 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 16:27:22,595 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 16:27:22,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:27:22,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:27:22,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 16:27:22,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:27:22,874 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:27:22,875 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:27:25,363 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 70 proven. 11 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-04-06 16:27:25,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:27:27,374 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:28:47,106 WARN L855 $PredicateComparison]: unable to prove that (forall ((v_main_~p~0_BEFORE_CALL_129 Int) (v_main_~s~0_BEFORE_CALL_125 Int) (v_main_~q~0_BEFORE_CALL_125 Int) (v_main_~r~0_BEFORE_CALL_126 Int)) (or (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_125) v_main_~r~0_BEFORE_CALL_126) v_main_~q~0_BEFORE_CALL_125) 1) (* (+ v_main_~p~0_BEFORE_CALL_129 (* (- 1) v_main_~q~0_BEFORE_CALL_125)) v_main_~s~0_BEFORE_CALL_125))) (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_126 v_main_~q~0_BEFORE_CALL_125) 1))) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (= .cse0 0) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_129) 0)))))) is different from true [2022-04-06 16:29:47,962 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~p~0_BEFORE_CALL_129 Int) (v_main_~s~0_BEFORE_CALL_125 Int) (v_main_~q~0_BEFORE_CALL_125 Int) (v_main_~r~0_BEFORE_CALL_126 Int)) (or (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_125) v_main_~r~0_BEFORE_CALL_126) v_main_~q~0_BEFORE_CALL_125) 1) (* (+ v_main_~p~0_BEFORE_CALL_129 (* (- 1) v_main_~q~0_BEFORE_CALL_125)) v_main_~s~0_BEFORE_CALL_125))) (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_126 v_main_~q~0_BEFORE_CALL_125) 1))) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (= .cse0 0) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_129) 0)))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-04-06 16:30:06,033 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~p~0_BEFORE_CALL_129 Int) (v_main_~s~0_BEFORE_CALL_125 Int) (v_main_~q~0_BEFORE_CALL_125 Int) (v_main_~r~0_BEFORE_CALL_126 Int)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_126 v_main_~q~0_BEFORE_CALL_125) 1))) (or (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_125) v_main_~r~0_BEFORE_CALL_126) v_main_~q~0_BEFORE_CALL_125) 1) (* (+ v_main_~p~0_BEFORE_CALL_129 (* (- 1) v_main_~q~0_BEFORE_CALL_125)) v_main_~s~0_BEFORE_CALL_125))) (= .cse0 0) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_129) 0)))) (not (= |c___VERIFIER_assert_#in~cond| 1))) is different from true [2022-04-06 16:30:19,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:19,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083972504] [2022-04-06 16:30:19,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:19,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123663993] [2022-04-06 16:30:19,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123663993] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:30:19,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:30:19,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 16:30:19,524 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:19,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [500053359] [2022-04-06 16:30:19,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [500053359] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:19,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:19,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:30:19,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120888721] [2022-04-06 16:30:19,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:19,525 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:30:19,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:19,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:30:19,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=189, Unknown=8, NotChecked=90, Total=342 [2022-04-06 16:30:19,526 INFO L87 Difference]: Start difference. First operand 196 states and 234 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 16:30:24,155 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 16:30:53,940 WARN L232 SmtUtils]: Spent 29.74s on a formula simplification. DAG size of input: 47 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 16:30:54,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:54,672 INFO L93 Difference]: Finished difference Result 224 states and 272 transitions. [2022-04-06 16:30:54,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 16:30:54,674 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 92 [2022-04-06 16:30:54,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:54,675 INFO L225 Difference]: With dead ends: 224 [2022-04-06 16:30:54,676 INFO L226 Difference]: Without dead ends: 222 [2022-04-06 16:30:54,676 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 58.5s TimeCoverageRelationStatistics Valid=76, Invalid=270, Unknown=8, NotChecked=108, Total=462 [2022-04-06 16:30:54,676 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:54,677 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 160 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-04-06 16:30:54,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-04-06 16:30:54,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2022-04-06 16:30:54,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 131 states have (on average 1.1145038167938932) internal successors, (146), 136 states have internal predecessors, (146), 61 states have call successors, (61), 28 states have call predecessors, (61), 27 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2022-04-06 16:30:54,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 267 transitions. [2022-04-06 16:30:54,733 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 267 transitions. Word has length 92 [2022-04-06 16:30:54,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:54,733 INFO L478 AbstractCegarLoop]: Abstraction has 220 states and 267 transitions. [2022-04-06 16:30:54,733 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 16:30:54,733 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 267 transitions. [2022-04-06 16:30:54,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 16:30:54,734 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:54,734 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:54,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-04-06 16:30:54,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 16:30:54,947 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:54,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:54,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 13 times [2022-04-06 16:30:54,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:54,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1028458408] [2022-04-06 16:30:54,948 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:54,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 14 times [2022-04-06 16:30:54,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:54,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315712143] [2022-04-06 16:30:54,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:54,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:54,956 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:54,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873367066] [2022-04-06 16:30:54,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:30:54,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:54,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:54,958 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 16:30:54,961 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 16:30:55,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:30:55,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:55,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 16:30:55,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 71 proven. 35 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 16:30:55,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 87 proven. 5 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-04-06 16:30:55,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:55,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315712143] [2022-04-06 16:30:55,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:55,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873367066] [2022-04-06 16:30:55,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873367066] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:55,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:55,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-04-06 16:30:55,734 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:55,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1028458408] [2022-04-06 16:30:55,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1028458408] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:55,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:55,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 16:30:55,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150943324] [2022-04-06 16:30:55,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:55,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 16:30:55,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:55,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 16:30:55,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:30:55,735 INFO L87 Difference]: Start difference. First operand 220 states and 267 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-04-06 16:30:56,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:56,217 INFO L93 Difference]: Finished difference Result 258 states and 307 transitions. [2022-04-06 16:30:56,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 16:30:56,217 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 97 [2022-04-06 16:30:56,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:56,219 INFO L225 Difference]: With dead ends: 258 [2022-04-06 16:30:56,219 INFO L226 Difference]: Without dead ends: 256 [2022-04-06 16:30:56,219 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:30:56,219 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 17 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:56,220 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 203 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:30:56,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-04-06 16:30:56,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 242. [2022-04-06 16:30:56,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 147 states have (on average 1.1020408163265305) internal successors, (162), 153 states have internal predecessors, (162), 62 states have call successors, (62), 33 states have call predecessors, (62), 32 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2022-04-06 16:30:56,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 285 transitions. [2022-04-06 16:30:56,264 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 285 transitions. Word has length 97 [2022-04-06 16:30:56,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:56,265 INFO L478 AbstractCegarLoop]: Abstraction has 242 states and 285 transitions. [2022-04-06 16:30:56,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-04-06 16:30:56,265 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 285 transitions. [2022-04-06 16:30:56,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 16:30:56,266 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:56,266 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:56,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:56,469 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 16:30:56,469 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:56,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:56,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1451182689, now seen corresponding path program 15 times [2022-04-06 16:30:56,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:56,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [537205510] [2022-04-06 16:30:56,470 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:56,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1451182689, now seen corresponding path program 16 times [2022-04-06 16:30:56,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:56,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992094593] [2022-04-06 16:30:56,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:56,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:56,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:56,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263158817] [2022-04-06 16:30:56,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:30:56,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:56,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:56,478 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 16:30:56,485 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 16:30:56,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:30:56,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:56,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 16:30:56,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:57,943 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 77 proven. 41 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-04-06 16:30:57,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 87 proven. 5 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-04-06 16:30:58,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:58,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992094593] [2022-04-06 16:30:58,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:58,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263158817] [2022-04-06 16:30:58,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263158817] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:58,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:58,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 23 [2022-04-06 16:30:58,323 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:58,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [537205510] [2022-04-06 16:30:58,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [537205510] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:58,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:58,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 16:30:58,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908022369] [2022-04-06 16:30:58,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:58,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 16:30:58,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:58,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 16:30:58,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-04-06 16:30:58,324 INFO L87 Difference]: Start difference. First operand 242 states and 285 transitions. Second operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 16:30:58,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:58,831 INFO L93 Difference]: Finished difference Result 297 states and 347 transitions. [2022-04-06 16:30:58,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 16:30:58,832 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) Word has length 97 [2022-04-06 16:30:58,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:58,845 INFO L225 Difference]: With dead ends: 297 [2022-04-06 16:30:58,845 INFO L226 Difference]: Without dead ends: 242 [2022-04-06 16:30:58,846 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-04-06 16:30:58,847 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:58,847 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 199 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:30:58,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-04-06 16:30:58,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2022-04-06 16:30:58,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 147 states have (on average 1.0952380952380953) internal successors, (161), 153 states have internal predecessors, (161), 62 states have call successors, (62), 33 states have call predecessors, (62), 32 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2022-04-06 16:30:58,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 284 transitions. [2022-04-06 16:30:58,894 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 284 transitions. Word has length 97 [2022-04-06 16:30:58,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:58,894 INFO L478 AbstractCegarLoop]: Abstraction has 242 states and 284 transitions. [2022-04-06 16:30:58,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 16:30:58,895 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 284 transitions. [2022-04-06 16:30:58,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 16:30:58,896 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:58,896 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:58,913 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 16:30:59,098 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:59,099 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:59,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:59,100 INFO L85 PathProgramCache]: Analyzing trace with hash -792800609, now seen corresponding path program 5 times [2022-04-06 16:30:59,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:59,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2056305078] [2022-04-06 16:30:59,100 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:59,100 INFO L85 PathProgramCache]: Analyzing trace with hash -792800609, now seen corresponding path program 6 times [2022-04-06 16:30:59,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:59,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940835884] [2022-04-06 16:30:59,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:59,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:59,110 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:59,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603183389] [2022-04-06 16:30:59,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:30:59,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:59,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:59,111 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 16:30:59,115 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 16:30:59,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:30:59,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:59,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 16:30:59,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 104 proven. 6 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-04-06 16:30:59,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 107 proven. 3 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-04-06 16:30:59,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:59,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940835884] [2022-04-06 16:30:59,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:59,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603183389] [2022-04-06 16:30:59,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603183389] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:59,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:59,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-04-06 16:30:59,861 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:59,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2056305078] [2022-04-06 16:30:59,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2056305078] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:59,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:59,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:30:59,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377738153] [2022-04-06 16:30:59,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:59,861 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:30:59,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:59,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:30:59,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:30:59,862 INFO L87 Difference]: Start difference. First operand 242 states and 284 transitions. Second operand has 10 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:31:00,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:00,035 INFO L93 Difference]: Finished difference Result 261 states and 307 transitions. [2022-04-06 16:31:00,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:31:00,036 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2022-04-06 16:31:00,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:00,037 INFO L225 Difference]: With dead ends: 261 [2022-04-06 16:31:00,037 INFO L226 Difference]: Without dead ends: 259 [2022-04-06 16:31:00,037 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:31:00,038 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:00,038 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 122 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:31:00,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-04-06 16:31:00,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 226. [2022-04-06 16:31:00,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 139 states have (on average 1.0935251798561152) internal successors, (152), 143 states have internal predecessors, (152), 55 states have call successors, (55), 32 states have call predecessors, (55), 31 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-04-06 16:31:00,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 261 transitions. [2022-04-06 16:31:00,093 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 261 transitions. Word has length 97 [2022-04-06 16:31:00,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:00,094 INFO L478 AbstractCegarLoop]: Abstraction has 226 states and 261 transitions. [2022-04-06 16:31:00,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:31:00,094 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 261 transitions. [2022-04-06 16:31:00,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 16:31:00,095 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:00,095 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:00,111 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 16:31:00,295 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:00,295 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:00,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:00,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1750450403, now seen corresponding path program 17 times [2022-04-06 16:31:00,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:00,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1107108982] [2022-04-06 16:31:00,296 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:00,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1750450403, now seen corresponding path program 18 times [2022-04-06 16:31:00,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:00,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877772876] [2022-04-06 16:31:00,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:00,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:00,306 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:00,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797463406] [2022-04-06 16:31:00,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:31:00,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:00,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:00,308 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 16:31:00,309 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 16:31:00,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:31:00,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:00,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 16:31:00,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:13,717 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:31:13,928 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 91 proven. 53 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-04-06 16:31:13,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:31:19,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:19,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877772876] [2022-04-06 16:31:19,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:19,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797463406] [2022-04-06 16:31:19,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797463406] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:31:19,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:31:19,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-04-06 16:31:19,271 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:19,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1107108982] [2022-04-06 16:31:19,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1107108982] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:19,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:19,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 16:31:19,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887318961] [2022-04-06 16:31:19,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:19,272 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 16:31:19,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:19,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 16:31:19,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=426, Unknown=1, NotChecked=0, Total=506 [2022-04-06 16:31:19,273 INFO L87 Difference]: Start difference. First operand 226 states and 261 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-04-06 16:31:32,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:32,162 INFO L93 Difference]: Finished difference Result 271 states and 316 transitions. [2022-04-06 16:31:32,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 16:31:32,162 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 110 [2022-04-06 16:31:32,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:32,164 INFO L225 Difference]: With dead ends: 271 [2022-04-06 16:31:32,164 INFO L226 Difference]: Without dead ends: 269 [2022-04-06 16:31:32,164 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=105, Invalid=596, Unknown=1, NotChecked=0, Total=702 [2022-04-06 16:31:32,166 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 27 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:32,166 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 172 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2022-04-06 16:31:32,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-04-06 16:31:32,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 237. [2022-04-06 16:31:32,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 147 states have (on average 1.0952380952380953) internal successors, (161), 150 states have internal predecessors, (161), 56 states have call successors, (56), 34 states have call predecessors, (56), 33 states have return successors, (55), 52 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-06 16:31:32,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 272 transitions. [2022-04-06 16:31:32,218 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 272 transitions. Word has length 110 [2022-04-06 16:31:32,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:32,219 INFO L478 AbstractCegarLoop]: Abstraction has 237 states and 272 transitions. [2022-04-06 16:31:32,219 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-04-06 16:31:32,219 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 272 transitions. [2022-04-06 16:31:32,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 16:31:32,220 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:32,220 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:32,225 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 16:31:32,421 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-04-06 16:31:32,421 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:32,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:32,421 INFO L85 PathProgramCache]: Analyzing trace with hash 805225117, now seen corresponding path program 19 times [2022-04-06 16:31:32,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:32,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1108017114] [2022-04-06 16:31:32,422 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:32,422 INFO L85 PathProgramCache]: Analyzing trace with hash 805225117, now seen corresponding path program 20 times [2022-04-06 16:31:32,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:32,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158299866] [2022-04-06 16:31:32,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:32,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:32,448 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:32,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348607409] [2022-04-06 16:31:32,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:31:32,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:32,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:32,450 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 16:31:32,451 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 16:31:32,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:31:32,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:32,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 16:31:32,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 107 proven. 22 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2022-04-06 16:31:32,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:31:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 38 proven. 45 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-04-06 16:31:33,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:33,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158299866] [2022-04-06 16:31:33,061 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:33,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348607409] [2022-04-06 16:31:33,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348607409] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:31:33,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:31:33,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-04-06 16:31:33,062 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:33,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1108017114] [2022-04-06 16:31:33,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1108017114] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:33,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:33,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:31:33,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88326966] [2022-04-06 16:31:33,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:33,062 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:31:33,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:33,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:31:33,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:31:33,063 INFO L87 Difference]: Start difference. First operand 237 states and 272 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 16:31:33,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:33,304 INFO L93 Difference]: Finished difference Result 319 states and 393 transitions. [2022-04-06 16:31:33,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 16:31:33,306 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 110 [2022-04-06 16:31:33,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:33,308 INFO L225 Difference]: With dead ends: 319 [2022-04-06 16:31:33,308 INFO L226 Difference]: Without dead ends: 291 [2022-04-06 16:31:33,308 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2022-04-06 16:31:33,309 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 14 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:33,309 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 190 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:31:33,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-04-06 16:31:33,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2022-04-06 16:31:33,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 174 states have (on average 1.1206896551724137) internal successors, (195), 177 states have internal predecessors, (195), 83 states have call successors, (83), 34 states have call predecessors, (83), 33 states have return successors, (82), 79 states have call predecessors, (82), 82 states have call successors, (82) [2022-04-06 16:31:33,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 360 transitions. [2022-04-06 16:31:33,391 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 360 transitions. Word has length 110 [2022-04-06 16:31:33,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:33,392 INFO L478 AbstractCegarLoop]: Abstraction has 291 states and 360 transitions. [2022-04-06 16:31:33,392 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 16:31:33,392 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 360 transitions. [2022-04-06 16:31:33,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 16:31:33,393 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:33,393 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:33,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 16:31:33,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 16:31:33,607 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:33,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:33,607 INFO L85 PathProgramCache]: Analyzing trace with hash -2103538785, now seen corresponding path program 21 times [2022-04-06 16:31:33,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:33,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1196099639] [2022-04-06 16:31:33,608 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:33,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2103538785, now seen corresponding path program 22 times [2022-04-06 16:31:33,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:33,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563907036] [2022-04-06 16:31:33,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:33,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:33,616 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:33,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788283844] [2022-04-06 16:31:33,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:31:33,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:33,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:33,617 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 16:31:33,619 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 16:31:33,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:31:33,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:33,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 16:31:33,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:33,870 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 90 proven. 39 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2022-04-06 16:31:33,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:31:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 38 proven. 45 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-04-06 16:31:34,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:34,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563907036] [2022-04-06 16:31:34,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:34,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788283844] [2022-04-06 16:31:34,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788283844] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:31:34,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:31:34,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-04-06 16:31:34,180 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:34,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1196099639] [2022-04-06 16:31:34,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1196099639] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:34,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:34,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:31:34,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971485757] [2022-04-06 16:31:34,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:34,181 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:31:34,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:34,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:31:34,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:31:34,182 INFO L87 Difference]: Start difference. First operand 291 states and 360 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 16:31:34,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:34,444 INFO L93 Difference]: Finished difference Result 355 states and 450 transitions. [2022-04-06 16:31:34,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 16:31:34,444 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 110 [2022-04-06 16:31:34,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:34,447 INFO L225 Difference]: With dead ends: 355 [2022-04-06 16:31:34,447 INFO L226 Difference]: Without dead ends: 287 [2022-04-06 16:31:34,448 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-04-06 16:31:34,448 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 14 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:34,448 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 240 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:31:34,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-04-06 16:31:34,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 285. [2022-04-06 16:31:34,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 169 states have (on average 1.106508875739645) internal successors, (187), 173 states have internal predecessors, (187), 83 states have call successors, (83), 33 states have call predecessors, (83), 32 states have return successors, (82), 78 states have call predecessors, (82), 82 states have call successors, (82) [2022-04-06 16:31:34,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 352 transitions. [2022-04-06 16:31:34,551 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 352 transitions. Word has length 110 [2022-04-06 16:31:34,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:34,552 INFO L478 AbstractCegarLoop]: Abstraction has 285 states and 352 transitions. [2022-04-06 16:31:34,552 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 16:31:34,552 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 352 transitions. [2022-04-06 16:31:34,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 16:31:34,553 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:34,553 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:34,570 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 16:31:34,757 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:34,758 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:34,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:34,758 INFO L85 PathProgramCache]: Analyzing trace with hash -527866339, now seen corresponding path program 23 times [2022-04-06 16:31:34,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:34,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1346312847] [2022-04-06 16:31:34,759 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:34,759 INFO L85 PathProgramCache]: Analyzing trace with hash -527866339, now seen corresponding path program 24 times [2022-04-06 16:31:34,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:34,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230455490] [2022-04-06 16:31:34,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:34,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:34,765 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:34,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640192968] [2022-04-06 16:31:34,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:31:34,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:34,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:34,771 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 16:31:34,774 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 16:31:35,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 16:31:35,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:35,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-06 16:31:35,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 115 proven. 48 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-04-06 16:31:36,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:31:41,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:41,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230455490] [2022-04-06 16:31:41,893 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:41,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640192968] [2022-04-06 16:31:41,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640192968] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:31:41,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:31:41,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-04-06 16:31:41,893 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:41,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1346312847] [2022-04-06 16:31:41,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1346312847] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:41,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:41,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 16:31:41,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835525486] [2022-04-06 16:31:41,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:41,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 16:31:41,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:41,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 16:31:41,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=489, Unknown=2, NotChecked=0, Total=600 [2022-04-06 16:31:41,895 INFO L87 Difference]: Start difference. First operand 285 states and 352 transitions. Second operand has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 10 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-04-06 16:31:43,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:43,155 INFO L93 Difference]: Finished difference Result 321 states and 396 transitions. [2022-04-06 16:31:43,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 16:31:43,155 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 10 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) Word has length 110 [2022-04-06 16:31:43,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:43,157 INFO L225 Difference]: With dead ends: 321 [2022-04-06 16:31:43,157 INFO L226 Difference]: Without dead ends: 319 [2022-04-06 16:31:43,158 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=142, Invalid=668, Unknown=2, NotChecked=0, Total=812 [2022-04-06 16:31:43,158 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 37 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:43,158 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 147 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 302 Invalid, 0 Unknown, 40 Unchecked, 0.6s Time] [2022-04-06 16:31:43,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-04-06 16:31:43,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 299. [2022-04-06 16:31:43,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 178 states have (on average 1.1067415730337078) internal successors, (197), 182 states have internal predecessors, (197), 86 states have call successors, (86), 35 states have call predecessors, (86), 34 states have return successors, (85), 81 states have call predecessors, (85), 85 states have call successors, (85) [2022-04-06 16:31:43,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 368 transitions. [2022-04-06 16:31:43,301 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 368 transitions. Word has length 110 [2022-04-06 16:31:43,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:43,303 INFO L478 AbstractCegarLoop]: Abstraction has 299 states and 368 transitions. [2022-04-06 16:31:43,303 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 10 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-04-06 16:31:43,303 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 368 transitions. [2022-04-06 16:31:43,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 16:31:43,304 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:43,304 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:43,311 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 16:31:43,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:43,512 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:43,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:43,512 INFO L85 PathProgramCache]: Analyzing trace with hash -880954721, now seen corresponding path program 25 times [2022-04-06 16:31:43,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:43,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [534226253] [2022-04-06 16:31:43,513 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:43,513 INFO L85 PathProgramCache]: Analyzing trace with hash -880954721, now seen corresponding path program 26 times [2022-04-06 16:31:43,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:43,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129519539] [2022-04-06 16:31:43,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:43,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:43,520 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:43,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869297353] [2022-04-06 16:31:43,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:31:43,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:43,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:43,522 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 16:31:43,524 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 16:31:43,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:31:43,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:43,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 16:31:43,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 98 proven. 31 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2022-04-06 16:31:43,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:31:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 41 proven. 42 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-04-06 16:31:44,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:44,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129519539] [2022-04-06 16:31:44,102 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:44,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869297353] [2022-04-06 16:31:44,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869297353] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:31:44,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:31:44,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-04-06 16:31:44,102 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:44,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [534226253] [2022-04-06 16:31:44,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [534226253] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:44,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:44,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:31:44,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527518767] [2022-04-06 16:31:44,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:44,103 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:31:44,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:44,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:31:44,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:31:44,104 INFO L87 Difference]: Start difference. First operand 299 states and 368 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 16:31:44,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:44,556 INFO L93 Difference]: Finished difference Result 453 states and 601 transitions. [2022-04-06 16:31:44,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:31:44,563 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 110 [2022-04-06 16:31:44,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:44,566 INFO L225 Difference]: With dead ends: 453 [2022-04-06 16:31:44,566 INFO L226 Difference]: Without dead ends: 415 [2022-04-06 16:31:44,567 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2022-04-06 16:31:44,572 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 17 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:44,573 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 238 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:31:44,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-04-06 16:31:44,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 365. [2022-04-06 16:31:44,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 211 states have (on average 1.1374407582938388) internal successors, (240), 215 states have internal predecessors, (240), 119 states have call successors, (119), 35 states have call predecessors, (119), 34 states have return successors, (118), 114 states have call predecessors, (118), 118 states have call successors, (118) [2022-04-06 16:31:44,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 477 transitions. [2022-04-06 16:31:44,736 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 477 transitions. Word has length 110 [2022-04-06 16:31:44,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:44,736 INFO L478 AbstractCegarLoop]: Abstraction has 365 states and 477 transitions. [2022-04-06 16:31:44,736 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 16:31:44,736 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 477 transitions. [2022-04-06 16:31:44,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 16:31:44,737 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:44,738 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:44,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-04-06 16:31:44,952 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-04-06 16:31:44,952 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:44,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:44,952 INFO L85 PathProgramCache]: Analyzing trace with hash 769627864, now seen corresponding path program 27 times [2022-04-06 16:31:44,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:44,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1447405320] [2022-04-06 16:31:44,953 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:44,953 INFO L85 PathProgramCache]: Analyzing trace with hash 769627864, now seen corresponding path program 28 times [2022-04-06 16:31:44,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:44,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7733381] [2022-04-06 16:31:44,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:44,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:44,959 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:44,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782436578] [2022-04-06 16:31:44,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:31:44,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:44,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:44,961 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 16:31:44,962 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 16:31:45,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:31:45,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:45,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 16:31:45,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:45,249 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 148 proven. 33 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-04-06 16:31:45,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:31:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 44 proven. 45 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-04-06 16:31:45,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:45,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7733381] [2022-04-06 16:31:45,587 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:45,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782436578] [2022-04-06 16:31:45,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782436578] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:31:45,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:31:45,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-04-06 16:31:45,587 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:45,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1447405320] [2022-04-06 16:31:45,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1447405320] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:45,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:45,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:31:45,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575684382] [2022-04-06 16:31:45,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:45,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:31:45,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:45,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:31:45,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:31:45,589 INFO L87 Difference]: Start difference. First operand 365 states and 477 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-04-06 16:31:45,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:45,900 INFO L93 Difference]: Finished difference Result 415 states and 537 transitions. [2022-04-06 16:31:45,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 16:31:45,903 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 115 [2022-04-06 16:31:45,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:45,905 INFO L225 Difference]: With dead ends: 415 [2022-04-06 16:31:45,906 INFO L226 Difference]: Without dead ends: 337 [2022-04-06 16:31:45,906 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2022-04-06 16:31:45,909 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:45,910 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 207 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:31:45,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-04-06 16:31:46,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 307. [2022-04-06 16:31:46,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 182 states have (on average 1.098901098901099) internal successors, (200), 187 states have internal predecessors, (200), 90 states have call successors, (90), 35 states have call predecessors, (90), 34 states have return successors, (89), 84 states have call predecessors, (89), 89 states have call successors, (89) [2022-04-06 16:31:46,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 379 transitions. [2022-04-06 16:31:46,035 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 379 transitions. Word has length 115 [2022-04-06 16:31:46,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:46,035 INFO L478 AbstractCegarLoop]: Abstraction has 307 states and 379 transitions. [2022-04-06 16:31:46,035 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-04-06 16:31:46,036 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 379 transitions. [2022-04-06 16:31:46,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 16:31:46,037 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:46,037 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:46,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 16:31:46,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 16:31:46,255 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:46,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:46,256 INFO L85 PathProgramCache]: Analyzing trace with hash 256983896, now seen corresponding path program 29 times [2022-04-06 16:31:46,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:46,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [679715174] [2022-04-06 16:31:46,256 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:46,256 INFO L85 PathProgramCache]: Analyzing trace with hash 256983896, now seen corresponding path program 30 times [2022-04-06 16:31:46,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:46,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653242291] [2022-04-06 16:31:46,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:46,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:46,263 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:46,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937402152] [2022-04-06 16:31:46,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:31:46,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:46,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:46,264 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:31:46,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 16:31:46,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:31:46,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:46,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 16:31:46,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:35:49,410 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_main_~x~0_BEFORE_CALL_272 Int) (aux_div_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95 Int) (aux_div_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117_141 Int) (aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117_141_165 Int) (aux_div_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95 Int) (aux_div_v_main_~q~0_BEFORE_CALL_205_51 Int) (aux_div_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95_57 Int) (v_main_~y~0_BEFORE_CALL_227 Int) (aux_div_v_main_~s~0_BEFORE_CALL_203_55 Int) (aux_div_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117 Int)) (let ((.cse25 (* aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117_141_165 aux_div_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95_57)) (.cse26 (* aux_div_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95 aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117_141_165))) (let ((.cse23 (* .cse26 2)) (.cse24 (* .cse25 2)) (.cse5 (* aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117_141_165 v_main_~x~0_BEFORE_CALL_272)) (.cse1 (* 2 aux_div_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95_57)) (.cse3 (* aux_div_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95 2)) (.cse12 (* aux_div_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95 v_main_~y~0_BEFORE_CALL_227)) (.cse29 (* aux_div_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95 aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117_141_165 v_main_~x~0_BEFORE_CALL_272)) (.cse30 (* aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117_141_165 aux_div_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95_57 v_main_~x~0_BEFORE_CALL_272)) (.cse28 (* aux_div_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95_57 v_main_~x~0_BEFORE_CALL_272)) (.cse27 (* aux_div_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95 v_main_~x~0_BEFORE_CALL_272))) (let ((.cse7 (* .cse27 2)) (.cse8 (* 2 v_main_~x~0_BEFORE_CALL_272)) (.cse9 (* 2 .cse28)) (.cse4 (* 2 .cse30)) (.cse6 (* .cse29 2)) (.cse11 (* aux_div_v_main_~s~0_BEFORE_CALL_203_55 2)) (.cse2 (* aux_div_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117_141 2)) (.cse22 (* aux_div_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95 2)) (.cse15 (* 2 .cse12)) (.cse13 (* v_main_~y~0_BEFORE_CALL_227 aux_div_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95_57)) (.cse10 (+ .cse1 .cse3)) (.cse16 (* .cse5 2)) (.cse17 (* 4 .cse30)) (.cse18 (* .cse29 4)) (.cse19 (* 4 .cse28)) (.cse20 (* .cse27 4)) (.cse21 (* 5 v_main_~x~0_BEFORE_CALL_272)) (.cse0 (+ .cse23 aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117_141_165 .cse24)) (.cse14 (* aux_div_v_main_~q~0_BEFORE_CALL_205_51 2))) (and (< .cse0 (+ .cse1 .cse2 .cse3 4)) (= (+ .cse4 .cse5 .cse6) (+ .cse7 .cse8 .cse9 (* (* aux_div_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117 v_main_~x~0_BEFORE_CALL_272) 2))) (< .cse10 (+ 2 .cse11)) (< (+ .cse7 .cse8 .cse9 (* aux_div_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117_141 v_main_~x~0_BEFORE_CALL_272)) (+ .cse4 .cse5 .cse6 .cse12 .cse13)) (<= .cse11 .cse10) (<= 1 v_main_~y~0_BEFORE_CALL_227) (<= v_main_~x~0_BEFORE_CALL_272 5) (<= (+ .cse1 2 .cse14 .cse3) .cse0) (<= (+ .cse15 .cse16 v_main_~y~0_BEFORE_CALL_227 .cse17 .cse18) (+ .cse19 (* 2 (* aux_div_v_main_~q~0_BEFORE_CALL_205_51 v_main_~x~0_BEFORE_CALL_272)) .cse20 .cse21)) (< .cse0 (+ .cse22 .cse1 .cse3 4)) (<= (+ .cse1 .cse2 2 .cse3) .cse0) (<= (+ .cse22 .cse1 2 .cse3) .cse0) (or (not (= (+ .cse15 (* 2 (* v_main_~x~0_BEFORE_CALL_272 (div (+ .cse23 (- 2) aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117_141_165 (* (- 2) aux_div_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95_57) .cse24 (* aux_div_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95 (- 2))) 2))) (* 2 .cse13)) (+ .cse5 (* 2 (* v_main_~x~0_BEFORE_CALL_272 (+ (- 1) (* (- 1) aux_div_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95_57) (* aux_div_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95 (- 1)) .cse25 .cse26))) (* 2 (* (div .cse10 2) v_main_~y~0_BEFORE_CALL_227))))) (<= 1 |c___VERIFIER_assert_#in~cond|)) (not (= (+ .cse16 v_main_~y~0_BEFORE_CALL_227 .cse17 (* (* aux_div_v_main_~s~0_BEFORE_CALL_203_55 v_main_~y~0_BEFORE_CALL_227) 2) .cse18) (+ .cse19 .cse20 .cse21 (* (* aux_div_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95 v_main_~x~0_BEFORE_CALL_272) 2)))) (< .cse1 2) (< .cse0 (+ .cse1 .cse14 .cse3 4))))))) is different from true [2022-04-06 16:40:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 130 proven. 55 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-04-06 16:40:37,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:40:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 146 proven. 3 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-04-06 16:40:39,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:40:39,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653242291] [2022-04-06 16:40:39,291 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:40:39,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937402152] [2022-04-06 16:40:39,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937402152] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:40:39,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:40:39,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 25 [2022-04-06 16:40:39,291 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:40:39,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [679715174] [2022-04-06 16:40:39,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [679715174] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:40:39,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:40:39,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 16:40:39,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904374482] [2022-04-06 16:40:39,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:40:39,292 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 16:40:39,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:40:39,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 16:40:39,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=438, Unknown=1, NotChecked=44, Total=600 [2022-04-06 16:40:39,293 INFO L87 Difference]: Start difference. First operand 307 states and 379 transitions. Second operand has 18 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 16:40:43,663 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (exists ((v_main_~x~0_BEFORE_CALL_272 Int) (aux_div_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95 Int) (aux_div_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117_141 Int) (aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117_141_165 Int) (aux_div_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95 Int) (aux_div_v_main_~q~0_BEFORE_CALL_205_51 Int) (aux_div_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95_57 Int) (v_main_~y~0_BEFORE_CALL_227 Int) (aux_div_v_main_~s~0_BEFORE_CALL_203_55 Int) (aux_div_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117 Int)) (let ((.cse25 (* aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117_141_165 aux_div_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95_57)) (.cse26 (* aux_div_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95 aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117_141_165))) (let ((.cse23 (* .cse26 2)) (.cse24 (* .cse25 2)) (.cse5 (* aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117_141_165 v_main_~x~0_BEFORE_CALL_272)) (.cse1 (* 2 aux_div_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95_57)) (.cse3 (* aux_div_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95 2)) (.cse12 (* aux_div_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95 v_main_~y~0_BEFORE_CALL_227)) (.cse29 (* aux_div_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95 aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117_141_165 v_main_~x~0_BEFORE_CALL_272)) (.cse30 (* aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117_141_165 aux_div_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95_57 v_main_~x~0_BEFORE_CALL_272)) (.cse28 (* aux_div_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95_57 v_main_~x~0_BEFORE_CALL_272)) (.cse27 (* aux_div_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95 v_main_~x~0_BEFORE_CALL_272))) (let ((.cse7 (* .cse27 2)) (.cse8 (* 2 v_main_~x~0_BEFORE_CALL_272)) (.cse9 (* 2 .cse28)) (.cse4 (* 2 .cse30)) (.cse6 (* .cse29 2)) (.cse11 (* aux_div_v_main_~s~0_BEFORE_CALL_203_55 2)) (.cse2 (* aux_div_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117_141 2)) (.cse22 (* aux_div_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95 2)) (.cse15 (* 2 .cse12)) (.cse13 (* v_main_~y~0_BEFORE_CALL_227 aux_div_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95_57)) (.cse10 (+ .cse1 .cse3)) (.cse16 (* .cse5 2)) (.cse17 (* 4 .cse30)) (.cse18 (* .cse29 4)) (.cse19 (* 4 .cse28)) (.cse20 (* .cse27 4)) (.cse21 (* 5 v_main_~x~0_BEFORE_CALL_272)) (.cse0 (+ .cse23 aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117_141_165 .cse24)) (.cse14 (* aux_div_v_main_~q~0_BEFORE_CALL_205_51 2))) (and (< .cse0 (+ .cse1 .cse2 .cse3 4)) (= (+ .cse4 .cse5 .cse6) (+ .cse7 .cse8 .cse9 (* (* aux_div_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117 v_main_~x~0_BEFORE_CALL_272) 2))) (< .cse10 (+ 2 .cse11)) (< (+ .cse7 .cse8 .cse9 (* aux_div_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117_141 v_main_~x~0_BEFORE_CALL_272)) (+ .cse4 .cse5 .cse6 .cse12 .cse13)) (<= .cse11 .cse10) (<= 1 v_main_~y~0_BEFORE_CALL_227) (<= v_main_~x~0_BEFORE_CALL_272 5) (<= (+ .cse1 2 .cse14 .cse3) .cse0) (<= (+ .cse15 .cse16 v_main_~y~0_BEFORE_CALL_227 .cse17 .cse18) (+ .cse19 (* 2 (* aux_div_v_main_~q~0_BEFORE_CALL_205_51 v_main_~x~0_BEFORE_CALL_272)) .cse20 .cse21)) (< .cse0 (+ .cse22 .cse1 .cse3 4)) (<= (+ .cse1 .cse2 2 .cse3) .cse0) (<= (+ .cse22 .cse1 2 .cse3) .cse0) (or (not (= (+ .cse15 (* 2 (* v_main_~x~0_BEFORE_CALL_272 (div (+ .cse23 (- 2) aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95_117_141_165 (* (- 2) aux_div_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95_57) .cse24 (* aux_div_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95 (- 2))) 2))) (* 2 .cse13)) (+ .cse5 (* 2 (* v_main_~x~0_BEFORE_CALL_272 (+ (- 1) (* (- 1) aux_div_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95_57) (* aux_div_aux_mod_v_main_~s~0_BEFORE_CALL_203_55_95 (- 1)) .cse25 .cse26))) (* 2 (* (div .cse10 2) v_main_~y~0_BEFORE_CALL_227))))) (<= 1 |c___VERIFIER_assert_#in~cond|)) (not (= (+ .cse16 v_main_~y~0_BEFORE_CALL_227 .cse17 (* (* aux_div_v_main_~s~0_BEFORE_CALL_203_55 v_main_~y~0_BEFORE_CALL_227) 2) .cse18) (+ .cse19 .cse20 .cse21 (* (* aux_div_aux_mod_v_main_~q~0_BEFORE_CALL_205_51_95 v_main_~x~0_BEFORE_CALL_272) 2)))) (< .cse1 2) (< .cse0 (+ .cse1 .cse14 .cse3 4)))))))) is different from true [2022-04-06 16:40:43,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:40:43,804 INFO L93 Difference]: Finished difference Result 448 states and 571 transitions. [2022-04-06 16:40:43,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 16:40:43,804 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) Word has length 115 [2022-04-06 16:40:43,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:40:43,806 INFO L225 Difference]: With dead ends: 448 [2022-04-06 16:40:43,806 INFO L226 Difference]: Without dead ends: 326 [2022-04-06 16:40:43,807 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 205 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=136, Invalid=572, Unknown=2, NotChecked=102, Total=812 [2022-04-06 16:40:43,807 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 32 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 16:40:43,807 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 175 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 507 Invalid, 0 Unknown, 65 Unchecked, 1.6s Time] [2022-04-06 16:40:43,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-04-06 16:40:43,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 318. [2022-04-06 16:40:43,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 189 states have (on average 1.0952380952380953) internal successors, (207), 192 states have internal predecessors, (207), 94 states have call successors, (94), 35 states have call predecessors, (94), 34 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2022-04-06 16:40:43,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 394 transitions. [2022-04-06 16:40:43,959 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 394 transitions. Word has length 115 [2022-04-06 16:40:43,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:40:43,960 INFO L478 AbstractCegarLoop]: Abstraction has 318 states and 394 transitions. [2022-04-06 16:40:43,960 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 16:40:43,960 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 394 transitions. [2022-04-06 16:40:43,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 16:40:43,961 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:40:43,961 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:40:43,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 16:40:44,166 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 16:40:44,167 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:40:44,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:40:44,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1986999402, now seen corresponding path program 31 times [2022-04-06 16:40:44,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:40:44,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1267672177] [2022-04-06 16:40:44,167 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:40:44,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1986999402, now seen corresponding path program 32 times [2022-04-06 16:40:44,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:40:44,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377405820] [2022-04-06 16:40:44,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:40:44,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:40:44,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:40:44,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986685065] [2022-04-06 16:40:44,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:40:44,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:40:44,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:40:44,176 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:40:44,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 16:40:44,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:40:44,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:40:44,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 16:40:44,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:40:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 103 proven. 85 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-04-06 16:40:45,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:40:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-04-06 16:40:45,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:40:45,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377405820] [2022-04-06 16:40:45,559 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:40:45,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986685065] [2022-04-06 16:40:45,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986685065] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:40:45,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:40:45,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2022-04-06 16:40:45,560 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:40:45,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1267672177] [2022-04-06 16:40:45,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1267672177] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:40:45,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:40:45,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 16:40:45,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373417538] [2022-04-06 16:40:45,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:40:45,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 16:40:45,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:40:45,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 16:40:45,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-04-06 16:40:45,561 INFO L87 Difference]: Start difference. First operand 318 states and 394 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-04-06 16:40:46,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:40:46,101 INFO L93 Difference]: Finished difference Result 369 states and 448 transitions. [2022-04-06 16:40:46,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 16:40:46,101 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 115 [2022-04-06 16:40:46,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:40:46,103 INFO L225 Difference]: With dead ends: 369 [2022-04-06 16:40:46,103 INFO L226 Difference]: Without dead ends: 280 [2022-04-06 16:40:46,103 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-04-06 16:40:46,104 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 25 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:40:46,104 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 181 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:40:46,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-04-06 16:40:46,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2022-04-06 16:40:46,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 167 states have (on average 1.095808383233533) internal successors, (183), 169 states have internal predecessors, (183), 82 states have call successors, (82), 31 states have call predecessors, (82), 30 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-04-06 16:40:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 346 transitions. [2022-04-06 16:40:46,201 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 346 transitions. Word has length 115 [2022-04-06 16:40:46,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:40:46,201 INFO L478 AbstractCegarLoop]: Abstraction has 280 states and 346 transitions. [2022-04-06 16:40:46,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-04-06 16:40:46,201 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 346 transitions. [2022-04-06 16:40:46,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 16:40:46,202 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:40:46,202 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:40:46,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-04-06 16:40:46,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 16:40:46,415 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:40:46,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:40:46,416 INFO L85 PathProgramCache]: Analyzing trace with hash 627101656, now seen corresponding path program 33 times [2022-04-06 16:40:46,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:40:46,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1658864209] [2022-04-06 16:40:46,416 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:40:46,416 INFO L85 PathProgramCache]: Analyzing trace with hash 627101656, now seen corresponding path program 34 times [2022-04-06 16:40:46,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:40:46,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861584006] [2022-04-06 16:40:46,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:40:46,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:40:46,422 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:40:46,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132799856] [2022-04-06 16:40:46,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:40:46,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:40:46,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:40:46,423 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:40:46,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 16:40:46,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:40:46,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:40:46,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 16:40:46,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:40:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 145 proven. 36 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-04-06 16:40:46,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:40:47,070 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 47 proven. 42 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-04-06 16:40:47,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:40:47,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861584006] [2022-04-06 16:40:47,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:40:47,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132799856] [2022-04-06 16:40:47,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132799856] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:40:47,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:40:47,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-04-06 16:40:47,071 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:40:47,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1658864209] [2022-04-06 16:40:47,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1658864209] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:40:47,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:40:47,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:40:47,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848814819] [2022-04-06 16:40:47,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:40:47,071 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:40:47,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:40:47,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:40:47,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:40:47,072 INFO L87 Difference]: Start difference. First operand 280 states and 346 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-04-06 16:40:47,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:40:47,341 INFO L93 Difference]: Finished difference Result 328 states and 408 transitions. [2022-04-06 16:40:47,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 16:40:47,342 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 115 [2022-04-06 16:40:47,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:40:47,343 INFO L225 Difference]: With dead ends: 328 [2022-04-06 16:40:47,343 INFO L226 Difference]: Without dead ends: 267 [2022-04-06 16:40:47,344 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-04-06 16:40:47,344 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 14 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:40:47,344 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 218 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:40:47,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-04-06 16:40:47,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2022-04-06 16:40:47,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 157 states have (on average 1.0955414012738853) internal successors, (172), 158 states have internal predecessors, (172), 83 states have call successors, (83), 27 states have call predecessors, (83), 26 states have return successors, (82), 81 states have call predecessors, (82), 82 states have call successors, (82) [2022-04-06 16:40:47,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 337 transitions. [2022-04-06 16:40:47,456 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 337 transitions. Word has length 115 [2022-04-06 16:40:47,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:40:47,456 INFO L478 AbstractCegarLoop]: Abstraction has 267 states and 337 transitions. [2022-04-06 16:40:47,456 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-04-06 16:40:47,456 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 337 transitions. [2022-04-06 16:40:47,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 16:40:47,457 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:40:47,457 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:40:47,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 16:40:47,680 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 16:40:47,680 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:40:47,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:40:47,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2129525610, now seen corresponding path program 35 times [2022-04-06 16:40:47,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:40:47,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [143964875] [2022-04-06 16:40:47,681 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:40:47,681 INFO L85 PathProgramCache]: Analyzing trace with hash -2129525610, now seen corresponding path program 36 times [2022-04-06 16:40:47,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:40:47,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943263564] [2022-04-06 16:40:47,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:40:47,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:40:47,687 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:40:47,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904842745] [2022-04-06 16:40:47,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:40:47,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:40:47,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:40:47,688 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:40:47,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 16:40:47,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:40:47,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:40:47,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 16:40:47,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:40:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 95 proven. 39 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2022-04-06 16:40:50,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:40:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-04-06 16:40:55,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:40:55,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943263564] [2022-04-06 16:40:55,327 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:40:55,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904842745] [2022-04-06 16:40:55,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904842745] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:40:55,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:40:55,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-04-06 16:40:55,327 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:40:55,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [143964875] [2022-04-06 16:40:55,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [143964875] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:40:55,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:40:55,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 16:40:55,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637823063] [2022-04-06 16:40:55,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:40:55,328 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 16:40:55,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:40:55,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 16:40:55,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:40:55,328 INFO L87 Difference]: Start difference. First operand 267 states and 337 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 16:40:57,718 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 16:41:00,154 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 16:41:00,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:00,223 INFO L93 Difference]: Finished difference Result 281 states and 348 transitions. [2022-04-06 16:41:00,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 16:41:00,223 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 115 [2022-04-06 16:41:00,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:00,225 INFO L225 Difference]: With dead ends: 281 [2022-04-06 16:41:00,225 INFO L226 Difference]: Without dead ends: 279 [2022-04-06 16:41:00,225 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:41:00,226 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:00,226 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 225 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 319 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-04-06 16:41:00,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-04-06 16:41:00,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2022-04-06 16:41:00,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 166 states have (on average 1.0903614457831325) internal successors, (181), 167 states have internal predecessors, (181), 83 states have call successors, (83), 30 states have call predecessors, (83), 29 states have return successors, (82), 81 states have call predecessors, (82), 82 states have call successors, (82) [2022-04-06 16:41:00,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 346 transitions. [2022-04-06 16:41:00,322 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 346 transitions. Word has length 115 [2022-04-06 16:41:00,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:00,322 INFO L478 AbstractCegarLoop]: Abstraction has 279 states and 346 transitions. [2022-04-06 16:41:00,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 16:41:00,323 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 346 transitions. [2022-04-06 16:41:00,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-06 16:41:00,323 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:00,323 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:00,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 16:41:00,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:00,539 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:00,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:00,540 INFO L85 PathProgramCache]: Analyzing trace with hash 759132938, now seen corresponding path program 37 times [2022-04-06 16:41:00,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:00,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [788826100] [2022-04-06 16:41:00,540 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:00,540 INFO L85 PathProgramCache]: Analyzing trace with hash 759132938, now seen corresponding path program 38 times [2022-04-06 16:41:00,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:00,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11145382] [2022-04-06 16:41:00,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:00,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:00,546 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:00,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794868610] [2022-04-06 16:41:00,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:41:00,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:00,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:00,547 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:41:00,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 16:41:00,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:41:00,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:00,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 16:41:00,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 261 proven. 36 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2022-04-06 16:41:00,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:41:01,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:01,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11145382] [2022-04-06 16:41:01,150 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:01,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794868610] [2022-04-06 16:41:01,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794868610] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:41:01,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:41:01,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 16:41:01,150 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:01,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [788826100] [2022-04-06 16:41:01,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [788826100] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:01,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:01,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:41:01,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996067599] [2022-04-06 16:41:01,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:01,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:41:01,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:01,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:41:01,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-04-06 16:41:01,152 INFO L87 Difference]: Start difference. First operand 279 states and 346 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-04-06 16:41:01,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:01,449 INFO L93 Difference]: Finished difference Result 369 states and 465 transitions. [2022-04-06 16:41:01,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 16:41:01,450 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 128 [2022-04-06 16:41:01,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:01,451 INFO L225 Difference]: With dead ends: 369 [2022-04-06 16:41:01,451 INFO L226 Difference]: Without dead ends: 273 [2022-04-06 16:41:01,451 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-04-06 16:41:01,452 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 16 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:01,452 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 241 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:41:01,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-04-06 16:41:01,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2022-04-06 16:41:01,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 163 states have (on average 1.0858895705521472) internal successors, (177), 164 states have internal predecessors, (177), 80 states have call successors, (80), 30 states have call predecessors, (80), 29 states have return successors, (79), 78 states have call predecessors, (79), 79 states have call successors, (79) [2022-04-06 16:41:01,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 336 transitions. [2022-04-06 16:41:01,529 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 336 transitions. Word has length 128 [2022-04-06 16:41:01,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:01,529 INFO L478 AbstractCegarLoop]: Abstraction has 273 states and 336 transitions. [2022-04-06 16:41:01,529 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-04-06 16:41:01,529 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 336 transitions. [2022-04-06 16:41:01,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-06 16:41:01,530 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:01,530 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:01,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 16:41:01,730 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-04-06 16:41:01,731 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:01,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:01,731 INFO L85 PathProgramCache]: Analyzing trace with hash -980158838, now seen corresponding path program 39 times [2022-04-06 16:41:01,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:01,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1798553798] [2022-04-06 16:41:01,731 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:01,732 INFO L85 PathProgramCache]: Analyzing trace with hash -980158838, now seen corresponding path program 40 times [2022-04-06 16:41:01,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:01,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766789644] [2022-04-06 16:41:01,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:01,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:01,738 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:01,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720846459] [2022-04-06 16:41:01,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:41:01,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:01,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:01,739 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:41:01,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 16:41:01,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:41:01,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:01,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 16:41:01,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:02,040 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 126 proven. 48 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2022-04-06 16:41:02,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:41:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 50 proven. 66 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-04-06 16:41:02,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:02,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766789644] [2022-04-06 16:41:02,433 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:02,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720846459] [2022-04-06 16:41:02,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720846459] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:41:02,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:41:02,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-04-06 16:41:02,434 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:02,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1798553798] [2022-04-06 16:41:02,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1798553798] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:02,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:02,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 16:41:02,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760532321] [2022-04-06 16:41:02,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:02,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 16:41:02,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:02,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 16:41:02,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-04-06 16:41:02,435 INFO L87 Difference]: Start difference. First operand 273 states and 336 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 16:41:02,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:02,703 INFO L93 Difference]: Finished difference Result 393 states and 494 transitions. [2022-04-06 16:41:02,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 16:41:02,706 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 128 [2022-04-06 16:41:02,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:02,707 INFO L225 Difference]: With dead ends: 393 [2022-04-06 16:41:02,707 INFO L226 Difference]: Without dead ends: 279 [2022-04-06 16:41:02,708 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-04-06 16:41:02,708 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 18 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:02,708 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 268 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:41:02,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-04-06 16:41:02,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2022-04-06 16:41:02,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 166 states have (on average 1.0843373493975903) internal successors, (180), 167 states have internal predecessors, (180), 83 states have call successors, (83), 30 states have call predecessors, (83), 29 states have return successors, (82), 81 states have call predecessors, (82), 82 states have call successors, (82) [2022-04-06 16:41:02,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 345 transitions. [2022-04-06 16:41:02,795 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 345 transitions. Word has length 128 [2022-04-06 16:41:02,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:02,795 INFO L478 AbstractCegarLoop]: Abstraction has 279 states and 345 transitions. [2022-04-06 16:41:02,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 16:41:02,795 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 345 transitions. [2022-04-06 16:41:02,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-04-06 16:41:02,796 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:02,796 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 7, 7, 7, 7, 6, 6, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:02,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 16:41:03,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:03,019 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:03,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:03,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1822030639, now seen corresponding path program 41 times [2022-04-06 16:41:03,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:03,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1594726162] [2022-04-06 16:41:03,020 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:03,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1822030639, now seen corresponding path program 42 times [2022-04-06 16:41:03,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:03,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797665912] [2022-04-06 16:41:03,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:03,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:03,028 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:03,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528147617] [2022-04-06 16:41:03,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:41:03,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:03,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:03,030 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:41:03,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 16:41:03,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 16:41:03,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:03,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 16:41:03,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 158 proven. 84 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-06 16:41:03,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:41:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 165 proven. 8 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2022-04-06 16:41:03,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:03,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797665912] [2022-04-06 16:41:03,622 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:03,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528147617] [2022-04-06 16:41:03,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528147617] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:41:03,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:41:03,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-04-06 16:41:03,623 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:03,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1594726162] [2022-04-06 16:41:03,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1594726162] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:03,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:03,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:41:03,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964995536] [2022-04-06 16:41:03,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:03,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:41:03,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:03,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:41:03,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-04-06 16:41:03,624 INFO L87 Difference]: Start difference. First operand 279 states and 345 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-04-06 16:41:04,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:04,041 INFO L93 Difference]: Finished difference Result 279 states and 345 transitions. [2022-04-06 16:41:04,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:41:04,042 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 146 [2022-04-06 16:41:04,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:04,042 INFO L225 Difference]: With dead ends: 279 [2022-04-06 16:41:04,042 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 16:41:04,044 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 279 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-04-06 16:41:04,045 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:04,045 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 133 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:41:04,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 16:41:04,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 16:41:04,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 16:41:04,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 16:41:04,046 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 146 [2022-04-06 16:41:04,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:04,046 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 16:41:04,046 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-04-06 16:41:04,046 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 16:41:04,046 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 16:41:04,049 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 16:41:04,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 16:41:04,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:04,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 16:41:23,081 WARN L232 SmtUtils]: Spent 7.70s on a formula simplification. DAG size of input: 76 DAG size of output: 46 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)