/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/ps6-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 06:34:13,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 06:34:13,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 06:34:13,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 06:34:13,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 06:34:13,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 06:34:13,538 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 06:34:13,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 06:34:13,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 06:34:13,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 06:34:13,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 06:34:13,541 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 06:34:13,542 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 06:34:13,543 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 06:34:13,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 06:34:13,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 06:34:13,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 06:34:13,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 06:34:13,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 06:34:13,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 06:34:13,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 06:34:13,554 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 06:34:13,560 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 06:34:13,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 06:34:13,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 06:34:13,561 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 06:34:13,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 06:34:13,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 06:34:13,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 06:34:13,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 06:34:13,561 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 06:34:13,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 06:34:13,561 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 06:34:13,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 06:34:13,562 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 06:34:13,562 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 06:34:13,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 06:34:13,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 06:34:13,562 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 06:34:13,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 06:34:13,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 06:34:13,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 06:34:13,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 06:34:13,562 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 06:34:13,562 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 06:34:13,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 06:34:13,563 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 06:34:13,563 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 06:34:13,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 06:34:13,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 06:34:13,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 06:34:13,748 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 06:34:13,749 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 06:34:13,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound20.c [2022-03-19 06:34:13,793 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2565832b1/04aa681d73bb4f529b5542b3c8d28c0a/FLAG10ee64345 [2022-03-19 06:34:14,132 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 06:34:14,132 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound20.c [2022-03-19 06:34:14,136 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2565832b1/04aa681d73bb4f529b5542b3c8d28c0a/FLAG10ee64345 [2022-03-19 06:34:14,146 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2565832b1/04aa681d73bb4f529b5542b3c8d28c0a [2022-03-19 06:34:14,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 06:34:14,148 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 06:34:14,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 06:34:14,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 06:34:14,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 06:34:14,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 06:34:14" (1/1) ... [2022-03-19 06:34:14,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@178eba7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:34:14, skipping insertion in model container [2022-03-19 06:34:14,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 06:34:14" (1/1) ... [2022-03-19 06:34:14,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 06:34:14,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 06:34:14,344 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/ps6-ll_valuebound20.c[458,471] [2022-03-19 06:34:14,370 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 06:34:14,375 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 06:34:14,382 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/ps6-ll_valuebound20.c[458,471] [2022-03-19 06:34:14,387 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 06:34:14,395 INFO L208 MainTranslator]: Completed translation [2022-03-19 06:34:14,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:34:14 WrapperNode [2022-03-19 06:34:14,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 06:34:14,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 06:34:14,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 06:34:14,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 06:34:14,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:34:14" (1/1) ... [2022-03-19 06:34:14,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:34:14" (1/1) ... [2022-03-19 06:34:14,407 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:34:14" (1/1) ... [2022-03-19 06:34:14,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:34:14" (1/1) ... [2022-03-19 06:34:14,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:34:14" (1/1) ... [2022-03-19 06:34:14,412 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:34:14" (1/1) ... [2022-03-19 06:34:14,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:34:14" (1/1) ... [2022-03-19 06:34:14,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 06:34:14,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 06:34:14,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 06:34:14,414 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 06:34:14,415 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:34:14" (1/1) ... [2022-03-19 06:34:14,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 06:34:14,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:34:14,434 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 06:34:14,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 06:34:14,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 06:34:14,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 06:34:14,464 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 06:34:14,464 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 06:34:14,464 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 06:34:14,464 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 06:34:14,464 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 06:34:14,464 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 06:34:14,464 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 06:34:14,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 06:34:14,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-19 06:34:14,465 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 06:34:14,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 06:34:14,466 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 06:34:14,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 06:34:14,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 06:34:14,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 06:34:14,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 06:34:14,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 06:34:14,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 06:34:14,511 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 06:34:14,512 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 06:34:14,605 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 06:34:14,609 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 06:34:14,610 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 06:34:14,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 06:34:14 BoogieIcfgContainer [2022-03-19 06:34:14,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 06:34:14,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 06:34:14,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 06:34:14,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 06:34:14,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 06:34:14" (1/3) ... [2022-03-19 06:34:14,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7095210f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 06:34:14, skipping insertion in model container [2022-03-19 06:34:14,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:34:14" (2/3) ... [2022-03-19 06:34:14,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7095210f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 06:34:14, skipping insertion in model container [2022-03-19 06:34:14,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 06:34:14" (3/3) ... [2022-03-19 06:34:14,620 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound20.c [2022-03-19 06:34:14,623 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 06:34:14,623 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 06:34:14,648 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 06:34:14,653 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 06:34:14,653 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 06:34:14,661 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 06:34:14,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 06:34:14,666 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:34:14,667 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:34:14,667 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:34:14,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:34:14,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1098891495, now seen corresponding path program 1 times [2022-03-19 06:34:14,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:14,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [25031997] [2022-03-19 06:34:14,683 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:34:14,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1098891495, now seen corresponding path program 2 times [2022-03-19 06:34:14,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:34:14,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793115455] [2022-03-19 06:34:14,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:34:14,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:34:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:34:14,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:34:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:34:14,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:34:14,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:34:14,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 06:34:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:34:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:34:14,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:34:14,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793115455] [2022-03-19 06:34:14,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793115455] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:34:14,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:34:14,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 06:34:14,822 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:34:14,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [25031997] [2022-03-19 06:34:14,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [25031997] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:34:14,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:34:14,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 06:34:14,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718143465] [2022-03-19 06:34:14,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:34:14,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 06:34:14,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:14,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 06:34:14,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 06:34:14,844 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 06:34:14,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:34:14,933 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2022-03-19 06:34:14,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 06:34:14,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-19 06:34:14,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:34:14,940 INFO L225 Difference]: With dead ends: 51 [2022-03-19 06:34:14,940 INFO L226 Difference]: Without dead ends: 24 [2022-03-19 06:34:14,942 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 06:34:14,945 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:34:14,946 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:34:14,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-19 06:34:14,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-03-19 06:34:14,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 06:34:14,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-03-19 06:34:14,981 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2022-03-19 06:34:14,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:34:14,982 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-03-19 06:34:14,982 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 06:34:14,982 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-03-19 06:34:14,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 06:34:14,984 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:34:14,984 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:34:14,984 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 06:34:14,985 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:34:14,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:34:14,987 INFO L85 PathProgramCache]: Analyzing trace with hash 769620075, now seen corresponding path program 1 times [2022-03-19 06:34:14,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:14,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [458241008] [2022-03-19 06:34:14,993 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:34:14,993 INFO L85 PathProgramCache]: Analyzing trace with hash 769620075, now seen corresponding path program 2 times [2022-03-19 06:34:14,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:34:14,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305636730] [2022-03-19 06:34:14,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:34:14,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:34:15,019 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:34:15,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710733043] [2022-03-19 06:34:15,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:34:15,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:34:15,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:34:15,022 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:34:15,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 06:34:15,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 06:34:15,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:34:15,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 06:34:15,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:34:15,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:34:15,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 06:34:15,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:34:15,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305636730] [2022-03-19 06:34:15,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:34:15,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710733043] [2022-03-19 06:34:15,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710733043] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:34:15,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:34:15,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 06:34:15,184 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:34:15,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [458241008] [2022-03-19 06:34:15,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [458241008] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:34:15,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:34:15,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 06:34:15,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796751916] [2022-03-19 06:34:15,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:34:15,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 06:34:15,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:15,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 06:34:15,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 06:34:15,198 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 06:34:15,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:34:15,263 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-03-19 06:34:15,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 06:34:15,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-19 06:34:15,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:34:15,264 INFO L225 Difference]: With dead ends: 35 [2022-03-19 06:34:15,264 INFO L226 Difference]: Without dead ends: 31 [2022-03-19 06:34:15,266 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 06:34:15,266 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:34:15,270 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 91 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:34:15,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-19 06:34:15,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-19 06:34:15,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 06:34:15,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-03-19 06:34:15,278 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2022-03-19 06:34:15,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:34:15,278 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-03-19 06:34:15,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 06:34:15,279 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-03-19 06:34:15,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 06:34:15,279 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:34:15,279 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:34:15,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 06:34:15,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:34:15,492 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:34:15,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:34:15,492 INFO L85 PathProgramCache]: Analyzing trace with hash 645812411, now seen corresponding path program 1 times [2022-03-19 06:34:15,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:15,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1313221552] [2022-03-19 06:34:15,493 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:34:15,493 INFO L85 PathProgramCache]: Analyzing trace with hash 645812411, now seen corresponding path program 2 times [2022-03-19 06:34:15,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:34:15,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876839959] [2022-03-19 06:34:15,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:34:15,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:34:15,519 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:34:15,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201453988] [2022-03-19 06:34:15,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:34:15,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:34:15,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:34:15,521 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:34:15,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 06:34:15,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:34:15,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:34:15,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 06:34:15,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:34:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:34:15,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:34:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 06:34:16,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:34:16,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876839959] [2022-03-19 06:34:16,435 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:34:16,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201453988] [2022-03-19 06:34:16,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201453988] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 06:34:16,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:34:16,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-19 06:34:16,435 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:34:16,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1313221552] [2022-03-19 06:34:16,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1313221552] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:34:16,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:34:16,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 06:34:16,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017908845] [2022-03-19 06:34:16,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:34:16,436 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 06:34:16,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:16,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 06:34:16,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-19 06:34:16,437 INFO L87 Difference]: Start difference. First operand 31 states and 34 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 06:34:16,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:34:16,474 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-03-19 06:34:16,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 06:34:16,474 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-03-19 06:34:16,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:34:16,475 INFO L225 Difference]: With dead ends: 37 [2022-03-19 06:34:16,475 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 06:34:16,475 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 06:34:16,476 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:34:16,476 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 81 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:34:16,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 06:34:16,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-19 06:34:16,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 06:34:16,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-03-19 06:34:16,482 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2022-03-19 06:34:16,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:34:16,483 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-03-19 06:34:16,483 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 06:34:16,483 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-03-19 06:34:16,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-19 06:34:16,483 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:34:16,484 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 06:34:16,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 06:34:16,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 06:34:16,688 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:34:16,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:34:16,688 INFO L85 PathProgramCache]: Analyzing trace with hash 463554397, now seen corresponding path program 1 times [2022-03-19 06:34:16,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:16,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1089818854] [2022-03-19 06:34:16,689 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:34:16,689 INFO L85 PathProgramCache]: Analyzing trace with hash 463554397, now seen corresponding path program 2 times [2022-03-19 06:34:16,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:34:16,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397465923] [2022-03-19 06:34:16,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:34:16,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:34:16,700 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:34:16,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899654178] [2022-03-19 06:34:16,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:34:16,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:34:16,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:34:16,702 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:34:16,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 06:34:16,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:34:16,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:34:16,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 06:34:16,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:34:16,904 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 06:34:16,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:34:17,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:34:17,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397465923] [2022-03-19 06:34:17,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:34:17,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899654178] [2022-03-19 06:34:17,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899654178] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:34:17,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:34:17,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-19 06:34:17,094 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:34:17,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1089818854] [2022-03-19 06:34:17,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1089818854] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:34:17,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:34:17,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 06:34:17,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069225329] [2022-03-19 06:34:17,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:34:17,095 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 06:34:17,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:17,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 06:34:17,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-19 06:34:17,095 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 06:34:17,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:34:17,167 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-03-19 06:34:17,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 06:34:17,167 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2022-03-19 06:34:17,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:34:17,170 INFO L225 Difference]: With dead ends: 42 [2022-03-19 06:34:17,170 INFO L226 Difference]: Without dead ends: 36 [2022-03-19 06:34:17,171 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:34:17,171 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 155 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 [2022-03-19 06:34:17,172 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 155 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:34:17,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-19 06:34:17,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-19 06:34:17,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 06:34:17,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-03-19 06:34:17,178 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 40 [2022-03-19 06:34:17,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:34:17,178 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-03-19 06:34:17,178 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 06:34:17,178 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-03-19 06:34:17,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 06:34:17,179 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:34:17,181 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:34:17,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 06:34:17,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:34:17,396 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:34:17,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:34:17,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1886956461, now seen corresponding path program 3 times [2022-03-19 06:34:17,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:17,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1818409542] [2022-03-19 06:34:17,397 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:34:17,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1886956461, now seen corresponding path program 4 times [2022-03-19 06:34:17,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:34:17,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388879529] [2022-03-19 06:34:17,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:34:17,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:34:17,405 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:34:17,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554190244] [2022-03-19 06:34:17,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:34:17,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:34:17,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:34:17,406 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:34:17,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 06:34:17,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:34:17,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:34:17,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 06:34:17,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:34:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 06:34:17,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:34:17,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:34:17,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388879529] [2022-03-19 06:34:17,695 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:34:17,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554190244] [2022-03-19 06:34:17,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554190244] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:34:17,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:34:17,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-19 06:34:17,696 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:34:17,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1818409542] [2022-03-19 06:34:17,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1818409542] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:34:17,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:34:17,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 06:34:17,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741936435] [2022-03-19 06:34:17,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:34:17,696 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 06:34:17,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:17,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 06:34:17,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-19 06:34:17,697 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-19 06:34:17,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:34:17,759 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-03-19 06:34:17,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 06:34:17,759 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2022-03-19 06:34:17,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:34:17,762 INFO L225 Difference]: With dead ends: 45 [2022-03-19 06:34:17,762 INFO L226 Difference]: Without dead ends: 39 [2022-03-19 06:34:17,762 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-19 06:34:17,763 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:34:17,763 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 195 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:34:17,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-19 06:34:17,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-19 06:34:17,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 06:34:17,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-03-19 06:34:17,771 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 47 [2022-03-19 06:34:17,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:34:17,772 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-03-19 06:34:17,772 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-19 06:34:17,772 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-03-19 06:34:17,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-19 06:34:17,773 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:34:17,773 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:34:17,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 06:34:17,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:34:17,988 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:34:17,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:34:17,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1213805219, now seen corresponding path program 5 times [2022-03-19 06:34:17,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:17,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1600715103] [2022-03-19 06:34:17,989 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:34:17,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1213805219, now seen corresponding path program 6 times [2022-03-19 06:34:17,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:34:17,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857573996] [2022-03-19 06:34:17,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:34:17,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:34:18,010 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:34:18,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [144544164] [2022-03-19 06:34:18,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:34:18,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:34:18,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:34:18,016 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:34:18,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 06:34:18,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 06:34:18,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:34:18,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 06:34:18,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:34:18,278 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 06:34:18,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:34:18,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:34:18,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857573996] [2022-03-19 06:34:18,435 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:34:18,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144544164] [2022-03-19 06:34:18,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144544164] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:34:18,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:34:18,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-19 06:34:18,436 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:34:18,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1600715103] [2022-03-19 06:34:18,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1600715103] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:34:18,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:34:18,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 06:34:18,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355055962] [2022-03-19 06:34:18,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:34:18,437 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 06:34:18,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:18,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 06:34:18,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:34:18,437 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-19 06:34:18,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:34:18,516 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-03-19 06:34:18,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 06:34:18,516 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2022-03-19 06:34:18,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:34:18,517 INFO L225 Difference]: With dead ends: 48 [2022-03-19 06:34:18,517 INFO L226 Difference]: Without dead ends: 42 [2022-03-19 06:34:18,517 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-19 06:34:18,518 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 2 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:34:18,518 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 239 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:34:18,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-19 06:34:18,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-03-19 06:34:18,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 06:34:18,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-03-19 06:34:18,525 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 54 [2022-03-19 06:34:18,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:34:18,525 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-03-19 06:34:18,525 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-19 06:34:18,525 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-03-19 06:34:18,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 06:34:18,526 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:34:18,526 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:34:18,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 06:34:18,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:34:18,731 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:34:18,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:34:18,731 INFO L85 PathProgramCache]: Analyzing trace with hash 307258797, now seen corresponding path program 7 times [2022-03-19 06:34:18,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:18,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1064069624] [2022-03-19 06:34:18,732 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:34:18,732 INFO L85 PathProgramCache]: Analyzing trace with hash 307258797, now seen corresponding path program 8 times [2022-03-19 06:34:18,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:34:18,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19416248] [2022-03-19 06:34:18,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:34:18,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:34:18,740 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:34:18,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972391053] [2022-03-19 06:34:18,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:34:18,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:34:18,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:34:18,743 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:34:18,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 06:34:18,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:34:18,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:34:18,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 06:34:18,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:34:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-19 06:34:19,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:34:19,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:34:19,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19416248] [2022-03-19 06:34:19,285 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:34:19,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972391053] [2022-03-19 06:34:19,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972391053] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:34:19,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:34:19,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-19 06:34:19,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:34:19,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1064069624] [2022-03-19 06:34:19,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1064069624] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:34:19,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:34:19,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:34:19,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822736606] [2022-03-19 06:34:19,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:34:19,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 06:34:19,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:19,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 06:34:19,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-19 06:34:19,287 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-03-19 06:34:19,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:34:19,382 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2022-03-19 06:34:19,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 06:34:19,382 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2022-03-19 06:34:19,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:34:19,383 INFO L225 Difference]: With dead ends: 51 [2022-03-19 06:34:19,383 INFO L226 Difference]: Without dead ends: 45 [2022-03-19 06:34:19,383 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-19 06:34:19,384 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:34:19,384 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 287 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:34:19,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-19 06:34:19,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-19 06:34:19,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 06:34:19,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-03-19 06:34:19,390 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 61 [2022-03-19 06:34:19,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:34:19,391 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-03-19 06:34:19,391 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-03-19 06:34:19,391 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-03-19 06:34:19,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 06:34:19,392 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:34:19,392 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:34:19,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 06:34:19,592 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:34:19,592 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:34:19,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:34:19,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1082774365, now seen corresponding path program 9 times [2022-03-19 06:34:19,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:19,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1909735389] [2022-03-19 06:34:19,593 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:34:19,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1082774365, now seen corresponding path program 10 times [2022-03-19 06:34:19,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:34:19,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134461354] [2022-03-19 06:34:19,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:34:19,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:34:19,606 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:34:19,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289909946] [2022-03-19 06:34:19,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:34:19,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:34:19,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:34:19,608 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:34:19,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 06:34:19,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:34:19,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:34:19,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 06:34:19,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:34:19,863 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-19 06:34:19,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:34:19,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:34:19,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134461354] [2022-03-19 06:34:19,993 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:34:19,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289909946] [2022-03-19 06:34:19,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289909946] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:34:19,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:34:19,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-19 06:34:19,994 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:34:19,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1909735389] [2022-03-19 06:34:19,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1909735389] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:34:19,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:34:19,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 06:34:19,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803055322] [2022-03-19 06:34:19,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:34:19,995 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 06:34:19,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:19,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 06:34:19,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-19 06:34:19,996 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-03-19 06:34:20,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:34:20,109 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-03-19 06:34:20,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 06:34:20,110 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2022-03-19 06:34:20,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:34:20,110 INFO L225 Difference]: With dead ends: 54 [2022-03-19 06:34:20,110 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 06:34:20,111 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:34:20,111 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 2 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:34:20,111 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 339 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:34:20,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 06:34:20,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-03-19 06:34:20,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 13 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 06:34:20,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-03-19 06:34:20,118 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 68 [2022-03-19 06:34:20,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:34:20,119 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-03-19 06:34:20,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-03-19 06:34:20,119 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-03-19 06:34:20,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 06:34:20,120 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:34:20,120 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:34:20,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-19 06:34:20,329 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:34:20,330 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:34:20,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:34:20,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1692754003, now seen corresponding path program 11 times [2022-03-19 06:34:20,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:20,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1473455678] [2022-03-19 06:34:20,331 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:34:20,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1692754003, now seen corresponding path program 12 times [2022-03-19 06:34:20,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:34:20,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618744806] [2022-03-19 06:34:20,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:34:20,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:34:20,338 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:34:20,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1324390368] [2022-03-19 06:34:20,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:34:20,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:34:20,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:34:20,339 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:34:20,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 06:34:20,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 06:34:20,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:34:20,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 06:34:20,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:34:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 63 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-19 06:34:20,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:34:21,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:34:21,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618744806] [2022-03-19 06:34:21,484 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:34:21,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324390368] [2022-03-19 06:34:21,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324390368] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:34:21,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:34:21,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-19 06:34:21,484 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:34:21,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1473455678] [2022-03-19 06:34:21,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1473455678] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:34:21,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:34:21,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:34:21,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060286861] [2022-03-19 06:34:21,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:34:21,485 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 06:34:21,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:21,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 06:34:21,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-03-19 06:34:21,486 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-03-19 06:34:21,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:34:21,622 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-03-19 06:34:21,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 06:34:21,622 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 75 [2022-03-19 06:34:21,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:34:21,623 INFO L225 Difference]: With dead ends: 57 [2022-03-19 06:34:21,623 INFO L226 Difference]: Without dead ends: 51 [2022-03-19 06:34:21,623 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-03-19 06:34:21,624 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:34:21,624 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 395 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:34:21,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-19 06:34:21,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-19 06:34:21,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 14 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 06:34:21,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-03-19 06:34:21,633 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 75 [2022-03-19 06:34:21,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:34:21,633 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-03-19 06:34:21,633 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-03-19 06:34:21,633 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-03-19 06:34:21,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-19 06:34:21,634 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:34:21,634 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:34:21,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 06:34:21,840 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-19 06:34:21,840 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:34:21,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:34:21,840 INFO L85 PathProgramCache]: Analyzing trace with hash 615143773, now seen corresponding path program 13 times [2022-03-19 06:34:21,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:21,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [435241146] [2022-03-19 06:34:21,841 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:34:21,841 INFO L85 PathProgramCache]: Analyzing trace with hash 615143773, now seen corresponding path program 14 times [2022-03-19 06:34:21,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:34:21,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589200090] [2022-03-19 06:34:21,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:34:21,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:34:21,850 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:34:21,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845437685] [2022-03-19 06:34:21,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:34:21,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:34:21,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:34:21,852 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:34:21,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 06:34:22,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:34:22,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:34:22,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-19 06:34:22,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:34:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 18 proven. 84 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-19 06:34:22,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:34:22,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:34:22,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589200090] [2022-03-19 06:34:22,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:34:22,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845437685] [2022-03-19 06:34:22,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845437685] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:34:22,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:34:22,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-19 06:34:22,983 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:34:22,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [435241146] [2022-03-19 06:34:22,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [435241146] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:34:22,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:34:22,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 06:34:22,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330836896] [2022-03-19 06:34:22,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:34:22,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 06:34:22,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:22,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 06:34:22,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:34:22,985 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-03-19 06:34:23,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:34:23,128 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-03-19 06:34:23,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 06:34:23,130 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 82 [2022-03-19 06:34:23,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:34:23,131 INFO L225 Difference]: With dead ends: 60 [2022-03-19 06:34:23,131 INFO L226 Difference]: Without dead ends: 54 [2022-03-19 06:34:23,131 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-19 06:34:23,131 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 2 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:34:23,132 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 455 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:34:23,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-19 06:34:23,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-19 06:34:23,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 06:34:23,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-03-19 06:34:23,139 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 82 [2022-03-19 06:34:23,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:34:23,139 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-03-19 06:34:23,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-03-19 06:34:23,140 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-03-19 06:34:23,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-19 06:34:23,140 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:34:23,140 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:34:23,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 06:34:23,346 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 06:34:23,346 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:34:23,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:34:23,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1334355539, now seen corresponding path program 15 times [2022-03-19 06:34:23,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:23,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1545008516] [2022-03-19 06:34:23,347 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:34:23,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1334355539, now seen corresponding path program 16 times [2022-03-19 06:34:23,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:34:23,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115769093] [2022-03-19 06:34:23,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:34:23,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:34:23,354 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:34:23,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418949118] [2022-03-19 06:34:23,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:34:23,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:34:23,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:34:23,355 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:34:23,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 06:34:23,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:34:23,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:34:23,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-19 06:34:23,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:34:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-19 06:34:23,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:34:23,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:34:23,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115769093] [2022-03-19 06:34:23,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:34:23,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418949118] [2022-03-19 06:34:23,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418949118] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:34:23,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:34:23,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-19 06:34:23,750 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:34:23,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1545008516] [2022-03-19 06:34:23,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1545008516] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:34:23,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:34:23,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 06:34:23,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113251562] [2022-03-19 06:34:23,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:34:23,750 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 06:34:23,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:23,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 06:34:23,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-19 06:34:23,751 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-03-19 06:34:23,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:34:23,945 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2022-03-19 06:34:23,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 06:34:23,946 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 89 [2022-03-19 06:34:23,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:34:23,948 INFO L225 Difference]: With dead ends: 63 [2022-03-19 06:34:23,948 INFO L226 Difference]: Without dead ends: 57 [2022-03-19 06:34:23,949 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-19 06:34:23,950 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:34:23,950 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 519 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:34:23,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-19 06:34:23,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-19 06:34:23,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 16 states have call successors, (16), 6 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 06:34:23,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-03-19 06:34:23,964 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 89 [2022-03-19 06:34:23,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:34:23,964 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-03-19 06:34:23,964 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-03-19 06:34:23,964 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-03-19 06:34:23,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-19 06:34:23,965 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:34:23,965 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:34:23,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 06:34:24,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 06:34:24,179 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:34:24,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:34:24,180 INFO L85 PathProgramCache]: Analyzing trace with hash 711483229, now seen corresponding path program 17 times [2022-03-19 06:34:24,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:24,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1434156930] [2022-03-19 06:34:24,180 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:34:24,180 INFO L85 PathProgramCache]: Analyzing trace with hash 711483229, now seen corresponding path program 18 times [2022-03-19 06:34:24,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:34:24,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099576405] [2022-03-19 06:34:24,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:34:24,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:34:24,189 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:34:24,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070652677] [2022-03-19 06:34:24,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:34:24,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:34:24,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:34:24,191 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:34:24,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 06:34:24,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 06:34:24,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:34:24,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-19 06:34:24,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:34:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 22 proven. 135 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-19 06:34:25,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:34:25,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:34:25,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099576405] [2022-03-19 06:34:25,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:34:25,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070652677] [2022-03-19 06:34:25,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070652677] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:34:25,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:34:25,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-19 06:34:25,742 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:34:25,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1434156930] [2022-03-19 06:34:25,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1434156930] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:34:25,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:34:25,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 06:34:25,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835278323] [2022-03-19 06:34:25,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:34:25,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 06:34:25,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:25,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 06:34:25,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-03-19 06:34:25,743 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-03-19 06:34:25,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:34:25,948 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2022-03-19 06:34:25,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 06:34:25,949 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 96 [2022-03-19 06:34:25,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:34:25,949 INFO L225 Difference]: With dead ends: 66 [2022-03-19 06:34:25,949 INFO L226 Difference]: Without dead ends: 60 [2022-03-19 06:34:25,950 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-03-19 06:34:25,950 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 2 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:34:25,950 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 587 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:34:25,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-19 06:34:25,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-03-19 06:34:25,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 17 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 06:34:25,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-03-19 06:34:25,960 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 96 [2022-03-19 06:34:25,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:34:25,960 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-03-19 06:34:25,960 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-03-19 06:34:25,960 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-03-19 06:34:25,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-19 06:34:25,961 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:34:25,961 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:34:25,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 06:34:26,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 06:34:26,167 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:34:26,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:34:26,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1610181715, now seen corresponding path program 19 times [2022-03-19 06:34:26,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:26,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [589943981] [2022-03-19 06:34:26,168 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:34:26,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1610181715, now seen corresponding path program 20 times [2022-03-19 06:34:26,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:34:26,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604228096] [2022-03-19 06:34:26,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:34:26,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:34:26,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:34:26,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231848588] [2022-03-19 06:34:26,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:34:26,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:34:26,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:34:26,177 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:34:26,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 06:34:27,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:34:27,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:34:27,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-19 06:34:27,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:34:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-19 06:34:27,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:34:27,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:34:27,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604228096] [2022-03-19 06:34:27,628 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:34:27,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231848588] [2022-03-19 06:34:27,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231848588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:34:27,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:34:27,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-19 06:34:27,628 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:34:27,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [589943981] [2022-03-19 06:34:27,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [589943981] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:34:27,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:34:27,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 06:34:27,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201513084] [2022-03-19 06:34:27,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:34:27,629 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 06:34:27,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:27,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 06:34:27,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-19 06:34:27,630 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-03-19 06:34:27,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:34:27,847 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-03-19 06:34:27,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 06:34:27,847 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 103 [2022-03-19 06:34:27,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:34:27,848 INFO L225 Difference]: With dead ends: 69 [2022-03-19 06:34:27,848 INFO L226 Difference]: Without dead ends: 63 [2022-03-19 06:34:27,848 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-19 06:34:27,849 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 2 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:34:27,849 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 659 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:34:27,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-19 06:34:27,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-03-19 06:34:27,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 18 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 06:34:27,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-03-19 06:34:27,856 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 103 [2022-03-19 06:34:27,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:34:27,856 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-03-19 06:34:27,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-03-19 06:34:27,856 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-03-19 06:34:27,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-19 06:34:27,857 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:34:27,857 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:34:27,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 06:34:28,063 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 06:34:28,063 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:34:28,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:34:28,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1881400669, now seen corresponding path program 21 times [2022-03-19 06:34:28,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:28,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [284540058] [2022-03-19 06:34:28,064 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:34:28,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1881400669, now seen corresponding path program 22 times [2022-03-19 06:34:28,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:34:28,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617539465] [2022-03-19 06:34:28,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:34:28,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:34:28,072 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:34:28,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482808993] [2022-03-19 06:34:28,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:34:28,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:34:28,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:34:28,077 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:34:28,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 06:34:28,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:34:28,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:34:28,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-19 06:34:28,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:34:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 26 proven. 198 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-19 06:34:28,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:34:28,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:34:28,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617539465] [2022-03-19 06:34:28,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:34:28,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482808993] [2022-03-19 06:34:28,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482808993] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:34:28,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:34:28,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-19 06:34:28,610 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:34:28,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [284540058] [2022-03-19 06:34:28,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [284540058] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:34:28,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:34:28,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 06:34:28,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355190432] [2022-03-19 06:34:28,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:34:28,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 06:34:28,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:28,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 06:34:28,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-03-19 06:34:28,612 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-03-19 06:34:28,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:34:28,855 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2022-03-19 06:34:28,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 06:34:28,856 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 110 [2022-03-19 06:34:28,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:34:28,857 INFO L225 Difference]: With dead ends: 72 [2022-03-19 06:34:28,857 INFO L226 Difference]: Without dead ends: 66 [2022-03-19 06:34:28,857 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-19 06:34:28,857 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 2 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:34:28,858 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 735 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:34:28,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-19 06:34:28,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-03-19 06:34:28,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 19 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 06:34:28,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-03-19 06:34:28,865 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 110 [2022-03-19 06:34:28,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:34:28,866 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-03-19 06:34:28,866 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-03-19 06:34:28,866 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-03-19 06:34:28,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-19 06:34:28,866 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:34:28,866 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:34:28,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 06:34:29,080 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 06:34:29,080 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:34:29,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:34:29,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1600671149, now seen corresponding path program 23 times [2022-03-19 06:34:29,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:34:29,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [765443318] [2022-03-19 06:34:29,081 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:34:29,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1600671149, now seen corresponding path program 24 times [2022-03-19 06:34:29,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:34:29,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808638280] [2022-03-19 06:34:29,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:34:29,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:34:29,088 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:34:29,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950605370] [2022-03-19 06:34:29,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:34:29,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:34:29,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:34:29,089 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:34:29,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process