/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/egcd3-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 16:41:31,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 16:41:31,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 16:41:31,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 16:41:31,660 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 16:41:31,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 16:41:31,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 16:41:31,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 16:41:31,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 16:41:31,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 16:41:31,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 16:41:31,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 16:41:31,677 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 16:41:31,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 16:41:31,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 16:41:31,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 16:41:31,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 16:41:31,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 16:41:31,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 16:41:31,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 16:41:31,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 16:41:31,695 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 16:41:31,705 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 16:41:31,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 16:41:31,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 16:41:31,707 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 16:41:31,707 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 16:41:31,707 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 16:41:31,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 16:41:31,708 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 16:41:31,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 16:41:31,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 16:41:31,709 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 16:41:31,709 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 16:41:31,709 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 16:41:31,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 16:41:31,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 16:41:31,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 16:41:31,709 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 16:41:31,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 16:41:31,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:41:31,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 16:41:31,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 16:41:31,710 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 16:41:31,710 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 16:41:31,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 16:41:31,710 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 16:41:31,710 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 16:41:31,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 16:41:31,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 16:41:31,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 16:41:31,958 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 16:41:31,959 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 16:41:31,960 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c [2022-04-06 16:41:32,012 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f0206077/97810c47af1a405aa3733225d5fc1c2e/FLAG301ab53aa [2022-04-06 16:41:32,402 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 16:41:32,403 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c [2022-04-06 16:41:32,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f0206077/97810c47af1a405aa3733225d5fc1c2e/FLAG301ab53aa [2022-04-06 16:41:32,822 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f0206077/97810c47af1a405aa3733225d5fc1c2e [2022-04-06 16:41:32,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 16:41:32,825 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 16:41:32,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 16:41:32,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 16:41:32,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 16:41:32,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:41:32" (1/1) ... [2022-04-06 16:41:32,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fc49eb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:41:32, skipping insertion in model container [2022-04-06 16:41:32,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:41:32" (1/1) ... [2022-04-06 16:41:32,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 16:41:32,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 16:41:32,983 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/egcd3-ll_valuebound10.c[490,503] [2022-04-06 16:41:32,997 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:41:33,003 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 16:41:33,015 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/egcd3-ll_valuebound10.c[490,503] [2022-04-06 16:41:33,023 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:41:33,033 INFO L208 MainTranslator]: Completed translation [2022-04-06 16:41:33,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:41:33 WrapperNode [2022-04-06 16:41:33,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 16:41:33,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 16:41:33,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 16:41:33,035 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 16:41:33,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:41:33" (1/1) ... [2022-04-06 16:41:33,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:41:33" (1/1) ... [2022-04-06 16:41:33,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:41:33" (1/1) ... [2022-04-06 16:41:33,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:41:33" (1/1) ... [2022-04-06 16:41:33,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:41:33" (1/1) ... [2022-04-06 16:41:33,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:41:33" (1/1) ... [2022-04-06 16:41:33,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:41:33" (1/1) ... [2022-04-06 16:41:33,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 16:41:33,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 16:41:33,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 16:41:33,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 16:41:33,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:41:33" (1/1) ... [2022-04-06 16:41:33,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:41:33,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:33,084 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 16:41:33,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 16:41:33,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 16:41:33,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 16:41:33,130 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 16:41:33,130 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 16:41:33,130 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 16:41:33,131 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 16:41:33,131 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 16:41:33,131 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 16:41:33,131 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 16:41:33,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 16:41:33,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 16:41:33,132 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 16:41:33,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 16:41:33,133 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 16:41:33,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 16:41:33,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 16:41:33,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 16:41:33,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 16:41:33,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 16:41:33,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 16:41:33,183 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 16:41:33,185 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 16:41:33,418 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 16:41:33,423 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 16:41:33,423 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-06 16:41:33,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:41:33 BoogieIcfgContainer [2022-04-06 16:41:33,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 16:41:33,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 16:41:33,426 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 16:41:33,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 16:41:33,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 04:41:32" (1/3) ... [2022-04-06 16:41:33,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5fcf7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:41:33, skipping insertion in model container [2022-04-06 16:41:33,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:41:33" (2/3) ... [2022-04-06 16:41:33,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5fcf7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:41:33, skipping insertion in model container [2022-04-06 16:41:33,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:41:33" (3/3) ... [2022-04-06 16:41:33,431 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound10.c [2022-04-06 16:41:33,435 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 16:41:33,435 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 16:41:33,470 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 16:41:33,475 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 16:41:33,475 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 16:41:33,487 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 16:41:33,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 16:41:33,493 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:33,494 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:33,494 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:33,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:33,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2022-04-06 16:41:33,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:33,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1806506096] [2022-04-06 16:41:33,514 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:33,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 2 times [2022-04-06 16:41:33,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:33,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503554132] [2022-04-06 16:41:33,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:33,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:41:33,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 16:41:33,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:41:33,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 16:41:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:41:33,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 16:41:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:41:33,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 16:41:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:41:33,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 16:41:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:41:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:41:33,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:33,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503554132] [2022-04-06 16:41:33,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503554132] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:33,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:33,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:41:33,675 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:33,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1806506096] [2022-04-06 16:41:33,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1806506096] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:33,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:33,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:41:33,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458003363] [2022-04-06 16:41:33,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:33,680 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 16:41:33,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:33,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 16:41:33,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:41:33,704 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:41:33,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:33,813 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2022-04-06 16:41:33,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 16:41:33,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-04-06 16:41:33,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:33,824 INFO L225 Difference]: With dead ends: 73 [2022-04-06 16:41:33,824 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 16:41:33,829 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:41:33,836 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:33,838 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:41:33,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 16:41:33,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-06 16:41:33,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 16:41:33,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-04-06 16:41:33,894 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-04-06 16:41:33,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:33,895 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-04-06 16:41:33,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:41:33,895 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-04-06 16:41:33,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 16:41:33,897 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:33,897 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:33,898 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 16:41:33,898 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:33,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:33,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2022-04-06 16:41:33,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:33,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1424117065] [2022-04-06 16:41:33,903 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:33,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 2 times [2022-04-06 16:41:33,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:33,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852721247] [2022-04-06 16:41:33,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:33,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:33,934 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:33,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956038136] [2022-04-06 16:41:33,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:41:33,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:33,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:33,936 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:41:33,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 16:41:33,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 16:41:33,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:33,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 16:41:33,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:41:34,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:41:34,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:34,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852721247] [2022-04-06 16:41:34,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:34,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956038136] [2022-04-06 16:41:34,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956038136] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:34,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:34,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 16:41:34,168 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:34,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1424117065] [2022-04-06 16:41:34,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1424117065] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:34,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:34,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 16:41:34,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391433859] [2022-04-06 16:41:34,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:34,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 16:41:34,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:34,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 16:41:34,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:41:34,170 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 16:41:34,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:34,258 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-04-06 16:41:34,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:41:34,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-04-06 16:41:34,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:34,260 INFO L225 Difference]: With dead ends: 54 [2022-04-06 16:41:34,260 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 16:41:34,260 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 16:41:34,261 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 14 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:34,262 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 173 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:41:34,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 16:41:34,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-04-06 16:41:34,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 16:41:34,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-04-06 16:41:34,273 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 34 [2022-04-06 16:41:34,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:34,274 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-04-06 16:41:34,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 16:41:34,274 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-04-06 16:41:34,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 16:41:34,275 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:34,275 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:34,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 16:41:34,488 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:34,488 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:34,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:34,489 INFO L85 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 1 times [2022-04-06 16:41:34,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:34,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [218200494] [2022-04-06 16:41:34,498 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:34,498 INFO L85 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 2 times [2022-04-06 16:41:34,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:34,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215993524] [2022-04-06 16:41:34,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:34,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:34,526 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:34,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327269231] [2022-04-06 16:41:34,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:41:34,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:34,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:34,533 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:41:34,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 16:41:34,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:41:34,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:34,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:41:34,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 16:41:34,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:41:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 16:41:34,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:34,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215993524] [2022-04-06 16:41:34,879 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:34,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327269231] [2022-04-06 16:41:34,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327269231] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:41:34,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:41:34,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 16:41:34,880 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:34,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [218200494] [2022-04-06 16:41:34,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [218200494] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:34,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:34,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:41:34,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403595075] [2022-04-06 16:41:34,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:34,882 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:41:34,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:34,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:41:34,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:41:34,883 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:41:35,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:35,105 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2022-04-06 16:41:35,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:41:35,106 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-04-06 16:41:35,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:35,107 INFO L225 Difference]: With dead ends: 103 [2022-04-06 16:41:35,108 INFO L226 Difference]: Without dead ends: 96 [2022-04-06 16:41:35,108 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:41:35,109 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 58 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:35,110 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 232 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:41:35,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-04-06 16:41:35,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-04-06 16:41:35,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 16:41:35,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-04-06 16:41:35,130 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-04-06 16:41:35,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:35,130 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-04-06 16:41:35,130 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:41:35,131 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-04-06 16:41:35,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 16:41:35,131 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:35,132 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:35,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 16:41:35,347 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 16:41:35,348 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:35,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:35,348 INFO L85 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 1 times [2022-04-06 16:41:35,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:35,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [710519738] [2022-04-06 16:41:35,349 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:35,349 INFO L85 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 2 times [2022-04-06 16:41:35,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:35,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130173689] [2022-04-06 16:41:35,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:35,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:35,364 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:35,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881343168] [2022-04-06 16:41:35,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:41:35,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:35,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:35,378 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:41:35,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 16:41:35,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:41:35,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:35,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 16:41:35,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 16:41:35,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:41:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:41:36,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:36,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130173689] [2022-04-06 16:41:36,113 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:36,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881343168] [2022-04-06 16:41:36,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881343168] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:41:36,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:41:36,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2022-04-06 16:41:36,114 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:36,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [710519738] [2022-04-06 16:41:36,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [710519738] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:36,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:36,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:41:36,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261398990] [2022-04-06 16:41:36,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:36,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:41:36,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:36,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:41:36,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:41:36,116 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 16:41:36,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:36,538 INFO L93 Difference]: Finished difference Result 112 states and 151 transitions. [2022-04-06 16:41:36,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 16:41:36,538 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2022-04-06 16:41:36,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:36,540 INFO L225 Difference]: With dead ends: 112 [2022-04-06 16:41:36,540 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 16:41:36,540 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-04-06 16:41:36,541 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 63 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:36,542 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 297 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:41:36,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 16:41:36,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2022-04-06 16:41:36,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 16:41:36,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2022-04-06 16:41:36,562 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 42 [2022-04-06 16:41:36,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:36,563 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2022-04-06 16:41:36,563 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 16:41:36,563 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2022-04-06 16:41:36,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 16:41:36,564 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:36,564 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:36,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 16:41:36,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:36,787 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:36,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:36,788 INFO L85 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 1 times [2022-04-06 16:41:36,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:36,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1938519648] [2022-04-06 16:41:36,788 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:36,788 INFO L85 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 2 times [2022-04-06 16:41:36,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:36,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724422780] [2022-04-06 16:41:36,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:36,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:36,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:36,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16821566] [2022-04-06 16:41:36,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:41:36,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:36,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:36,803 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:41:36,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 16:41:36,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:41:36,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:36,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 16:41:36,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 16:41:37,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:41:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 16:41:37,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:37,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724422780] [2022-04-06 16:41:37,126 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:37,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16821566] [2022-04-06 16:41:37,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16821566] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 16:41:37,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:41:37,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-04-06 16:41:37,127 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:37,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1938519648] [2022-04-06 16:41:37,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1938519648] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:37,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:37,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:41:37,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634410987] [2022-04-06 16:41:37,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:37,128 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:41:37,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:37,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:41:37,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-04-06 16:41:37,129 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:41:37,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:37,183 INFO L93 Difference]: Finished difference Result 130 states and 179 transitions. [2022-04-06 16:41:37,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:41:37,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-04-06 16:41:37,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:37,185 INFO L225 Difference]: With dead ends: 130 [2022-04-06 16:41:37,185 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 16:41:37,185 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-06 16:41:37,186 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:37,186 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 141 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:41:37,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 16:41:37,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2022-04-06 16:41:37,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 76 states have (on average 1.263157894736842) internal successors, (96), 77 states have internal predecessors, (96), 39 states have call successors, (39), 8 states have call predecessors, (39), 7 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-04-06 16:41:37,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 172 transitions. [2022-04-06 16:41:37,211 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 172 transitions. Word has length 47 [2022-04-06 16:41:37,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:37,211 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 172 transitions. [2022-04-06 16:41:37,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:41:37,212 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 172 transitions. [2022-04-06 16:41:37,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 16:41:37,213 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:37,213 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:37,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 16:41:37,426 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:37,427 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:37,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:37,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 1 times [2022-04-06 16:41:37,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:37,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [199667458] [2022-04-06 16:41:37,428 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:37,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 2 times [2022-04-06 16:41:37,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:37,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310923136] [2022-04-06 16:41:37,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:37,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:37,440 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:37,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448773370] [2022-04-06 16:41:37,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:41:37,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:37,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:37,443 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:41:37,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 16:41:37,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:41:37,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:37,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 16:41:37,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 16:41:37,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:41:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:41:37,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:37,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310923136] [2022-04-06 16:41:37,982 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:37,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448773370] [2022-04-06 16:41:37,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448773370] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:41:37,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:41:37,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2022-04-06 16:41:37,982 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:37,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [199667458] [2022-04-06 16:41:37,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [199667458] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:37,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:37,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 16:41:37,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842651100] [2022-04-06 16:41:37,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:37,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 16:41:37,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:37,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 16:41:37,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:41:37,986 INFO L87 Difference]: Start difference. First operand 123 states and 172 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 16:41:38,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:38,196 INFO L93 Difference]: Finished difference Result 137 states and 184 transitions. [2022-04-06 16:41:38,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 16:41:38,196 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-04-06 16:41:38,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:38,197 INFO L225 Difference]: With dead ends: 137 [2022-04-06 16:41:38,197 INFO L226 Difference]: Without dead ends: 135 [2022-04-06 16:41:38,198 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:41:38,199 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 87 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:38,199 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 218 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:41:38,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-04-06 16:41:38,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2022-04-06 16:41:38,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 83 states have internal predecessors, (102), 39 states have call successors, (39), 10 states have call predecessors, (39), 9 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-04-06 16:41:38,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 178 transitions. [2022-04-06 16:41:38,222 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 178 transitions. Word has length 47 [2022-04-06 16:41:38,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:38,222 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 178 transitions. [2022-04-06 16:41:38,222 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 16:41:38,222 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 178 transitions. [2022-04-06 16:41:38,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 16:41:38,223 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:38,223 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:38,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 16:41:38,446 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:38,447 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:38,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:38,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 3 times [2022-04-06 16:41:38,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:38,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1267455700] [2022-04-06 16:41:38,448 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:38,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 4 times [2022-04-06 16:41:38,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:38,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038630189] [2022-04-06 16:41:38,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:38,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:38,459 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:38,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634143878] [2022-04-06 16:41:38,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:41:38,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:38,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:38,461 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:41:38,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 16:41:38,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:41:38,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:38,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 16:41:38,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:38,570 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:41:38,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:41:38,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:38,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038630189] [2022-04-06 16:41:38,570 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:38,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634143878] [2022-04-06 16:41:38,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634143878] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:38,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:38,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:41:38,571 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:38,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1267455700] [2022-04-06 16:41:38,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1267455700] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:38,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:38,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:41:38,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317697097] [2022-04-06 16:41:38,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:38,573 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:41:38,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:38,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:41:38,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:41:38,574 INFO L87 Difference]: Start difference. First operand 131 states and 178 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 16:41:38,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:38,651 INFO L93 Difference]: Finished difference Result 170 states and 230 transitions. [2022-04-06 16:41:38,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:41:38,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-04-06 16:41:38,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:38,654 INFO L225 Difference]: With dead ends: 170 [2022-04-06 16:41:38,654 INFO L226 Difference]: Without dead ends: 114 [2022-04-06 16:41:38,657 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 16:41:38,658 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:38,658 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 155 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:41:38,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-04-06 16:41:38,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2022-04-06 16:41:38,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 66 states have internal predecessors, (77), 31 states have call successors, (31), 10 states have call predecessors, (31), 9 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-04-06 16:41:38,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 137 transitions. [2022-04-06 16:41:38,683 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 137 transitions. Word has length 47 [2022-04-06 16:41:38,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:38,683 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 137 transitions. [2022-04-06 16:41:38,683 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 16:41:38,684 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 137 transitions. [2022-04-06 16:41:38,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 16:41:38,685 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:38,685 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:38,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 16:41:38,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:38,899 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:38,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:38,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 1 times [2022-04-06 16:41:38,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:38,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1522336209] [2022-04-06 16:41:38,900 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:38,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 2 times [2022-04-06 16:41:38,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:38,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325035527] [2022-04-06 16:41:38,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:38,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:38,911 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:38,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972666979] [2022-04-06 16:41:38,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:41:38,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:38,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:38,913 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:41:38,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 16:41:38,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:41:38,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:38,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 16:41:38,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:39,076 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 16:41:39,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:41:39,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:39,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325035527] [2022-04-06 16:41:39,076 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:39,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972666979] [2022-04-06 16:41:39,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972666979] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:39,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:39,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:41:39,077 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:39,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1522336209] [2022-04-06 16:41:39,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1522336209] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:39,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:39,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:41:39,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959492406] [2022-04-06 16:41:39,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:39,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:41:39,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:39,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:41:39,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:41:39,078 INFO L87 Difference]: Start difference. First operand 106 states and 137 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 16:41:39,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:39,144 INFO L93 Difference]: Finished difference Result 158 states and 221 transitions. [2022-04-06 16:41:39,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:41:39,144 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-04-06 16:41:39,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:39,147 INFO L225 Difference]: With dead ends: 158 [2022-04-06 16:41:39,147 INFO L226 Difference]: Without dead ends: 156 [2022-04-06 16:41:39,147 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:41:39,148 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:39,148 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 156 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:41:39,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-04-06 16:41:39,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 140. [2022-04-06 16:41:39,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 74 states have (on average 1.162162162162162) internal successors, (86), 81 states have internal predecessors, (86), 55 states have call successors, (55), 11 states have call predecessors, (55), 10 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2022-04-06 16:41:39,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2022-04-06 16:41:39,176 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 52 [2022-04-06 16:41:39,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:39,179 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2022-04-06 16:41:39,179 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 16:41:39,179 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2022-04-06 16:41:39,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 16:41:39,183 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:39,183 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:39,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 16:41:39,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:39,399 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:39,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:39,400 INFO L85 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 1 times [2022-04-06 16:41:39,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:39,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1646981806] [2022-04-06 16:41:39,400 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:39,401 INFO L85 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 2 times [2022-04-06 16:41:39,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:39,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056027977] [2022-04-06 16:41:39,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:39,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:39,418 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:39,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521275966] [2022-04-06 16:41:39,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:41:39,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:39,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:39,423 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:41:39,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 16:41:39,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:41:39,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:39,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 16:41:39,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 16:41:39,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:41:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 16:41:40,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:40,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056027977] [2022-04-06 16:41:40,547 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:40,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521275966] [2022-04-06 16:41:40,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521275966] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:41:40,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:41:40,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2022-04-06 16:41:40,548 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:40,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1646981806] [2022-04-06 16:41:40,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1646981806] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:40,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:40,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 16:41:40,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516216089] [2022-04-06 16:41:40,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:40,548 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 16:41:40,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:40,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 16:41:40,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-04-06 16:41:40,549 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 16:41:41,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:41,136 INFO L93 Difference]: Finished difference Result 200 states and 283 transitions. [2022-04-06 16:41:41,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:41:41,137 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 64 [2022-04-06 16:41:41,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:41,140 INFO L225 Difference]: With dead ends: 200 [2022-04-06 16:41:41,140 INFO L226 Difference]: Without dead ends: 197 [2022-04-06 16:41:41,140 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-04-06 16:41:41,141 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 53 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:41,141 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 285 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:41:41,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-04-06 16:41:41,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 193. [2022-04-06 16:41:41,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 110 states have internal predecessors, (119), 79 states have call successors, (79), 13 states have call predecessors, (79), 12 states have return successors, (77), 69 states have call predecessors, (77), 77 states have call successors, (77) [2022-04-06 16:41:41,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 275 transitions. [2022-04-06 16:41:41,182 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 275 transitions. Word has length 64 [2022-04-06 16:41:41,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:41,182 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 275 transitions. [2022-04-06 16:41:41,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 16:41:41,182 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 275 transitions. [2022-04-06 16:41:41,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 16:41:41,183 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:41,183 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:41,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 16:41:41,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-06 16:41:41,406 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:41,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:41,406 INFO L85 PathProgramCache]: Analyzing trace with hash -368004398, now seen corresponding path program 3 times [2022-04-06 16:41:41,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:41,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [482992922] [2022-04-06 16:41:41,407 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:41,407 INFO L85 PathProgramCache]: Analyzing trace with hash -368004398, now seen corresponding path program 4 times [2022-04-06 16:41:41,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:41,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410839140] [2022-04-06 16:41:41,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:41,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:41,417 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:41,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122664106] [2022-04-06 16:41:41,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:41:41,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:41,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:41,424 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:41:41,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 16:41:41,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:41:41,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:41,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 16:41:41,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:41,620 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 16:41:41,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:41:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 16:41:41,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:41,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410839140] [2022-04-06 16:41:41,737 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:41,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122664106] [2022-04-06 16:41:41,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122664106] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:41:41,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:41:41,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-04-06 16:41:41,738 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:41,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [482992922] [2022-04-06 16:41:41,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [482992922] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:41,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:41,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:41:41,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161796849] [2022-04-06 16:41:41,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:41,739 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:41:41,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:41,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:41:41,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-04-06 16:41:41,740 INFO L87 Difference]: Start difference. First operand 193 states and 275 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 16:41:42,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:42,124 INFO L93 Difference]: Finished difference Result 288 states and 424 transitions. [2022-04-06 16:41:42,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 16:41:42,124 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2022-04-06 16:41:42,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:42,127 INFO L225 Difference]: With dead ends: 288 [2022-04-06 16:41:42,127 INFO L226 Difference]: Without dead ends: 281 [2022-04-06 16:41:42,127 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-04-06 16:41:42,128 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 48 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:42,128 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 318 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:41:42,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-04-06 16:41:42,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 208. [2022-04-06 16:41:42,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 116 states have (on average 1.206896551724138) internal successors, (140), 122 states have internal predecessors, (140), 79 states have call successors, (79), 13 states have call predecessors, (79), 12 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-04-06 16:41:42,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 296 transitions. [2022-04-06 16:41:42,197 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 296 transitions. Word has length 69 [2022-04-06 16:41:42,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:42,198 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 296 transitions. [2022-04-06 16:41:42,198 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 16:41:42,198 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 296 transitions. [2022-04-06 16:41:42,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 16:41:42,199 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:42,199 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:42,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 16:41:42,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 16:41:42,399 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:42,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:42,400 INFO L85 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 1 times [2022-04-06 16:41:42,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:42,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1349002957] [2022-04-06 16:41:42,400 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:42,400 INFO L85 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 2 times [2022-04-06 16:41:42,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:42,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006791043] [2022-04-06 16:41:42,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:42,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:42,411 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:42,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722159264] [2022-04-06 16:41:42,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:41:42,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:42,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:42,419 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:41:42,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 16:41:42,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:41:42,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:42,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 16:41:42,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-04-06 16:41:42,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:41:42,804 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-04-06 16:41:42,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:42,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006791043] [2022-04-06 16:41:42,805 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:42,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722159264] [2022-04-06 16:41:42,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722159264] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 16:41:42,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:41:42,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-06 16:41:42,805 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:42,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1349002957] [2022-04-06 16:41:42,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1349002957] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:42,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:42,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:41:42,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056961726] [2022-04-06 16:41:42,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:42,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:41:42,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:42,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:41:42,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 16:41:42,808 INFO L87 Difference]: Start difference. First operand 208 states and 296 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 16:41:42,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:42,883 INFO L93 Difference]: Finished difference Result 214 states and 301 transitions. [2022-04-06 16:41:42,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:41:42,884 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 74 [2022-04-06 16:41:42,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:42,886 INFO L225 Difference]: With dead ends: 214 [2022-04-06 16:41:42,886 INFO L226 Difference]: Without dead ends: 212 [2022-04-06 16:41:42,886 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 16:41:42,886 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:42,887 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 139 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:41:42,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-04-06 16:41:42,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-04-06 16:41:42,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 119 states have (on average 1.2016806722689075) internal successors, (143), 125 states have internal predecessors, (143), 79 states have call successors, (79), 14 states have call predecessors, (79), 13 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-04-06 16:41:42,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 299 transitions. [2022-04-06 16:41:42,928 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 299 transitions. Word has length 74 [2022-04-06 16:41:42,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:42,928 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 299 transitions. [2022-04-06 16:41:42,928 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 16:41:42,928 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 299 transitions. [2022-04-06 16:41:42,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 16:41:42,933 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:42,933 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:42,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 16:41:43,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 16:41:43,147 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:43,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:43,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 1 times [2022-04-06 16:41:43,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:43,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [493589577] [2022-04-06 16:41:43,148 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:43,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 2 times [2022-04-06 16:41:43,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:43,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811687824] [2022-04-06 16:41:43,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:43,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:43,166 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:43,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1114396373] [2022-04-06 16:41:43,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:41:43,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:43,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:43,172 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:41:43,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 16:41:43,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:41:43,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:43,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 16:41:43,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:43,374 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-04-06 16:41:43,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:41:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-04-06 16:41:43,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:43,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811687824] [2022-04-06 16:41:43,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:43,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114396373] [2022-04-06 16:41:43,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114396373] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:41:43,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:41:43,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 16:41:43,534 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:43,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [493589577] [2022-04-06 16:41:43,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [493589577] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:43,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:43,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:41:43,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990587488] [2022-04-06 16:41:43,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:43,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:41:43,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:43,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:41:43,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:41:43,536 INFO L87 Difference]: Start difference. First operand 212 states and 299 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 16:41:43,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:43,812 INFO L93 Difference]: Finished difference Result 226 states and 310 transitions. [2022-04-06 16:41:43,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:41:43,813 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 72 [2022-04-06 16:41:43,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:43,817 INFO L225 Difference]: With dead ends: 226 [2022-04-06 16:41:43,817 INFO L226 Difference]: Without dead ends: 224 [2022-04-06 16:41:43,817 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:41:43,818 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:43,819 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 173 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:41:43,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-04-06 16:41:43,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-04-06 16:41:43,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 128 states have (on average 1.1875) internal successors, (152), 134 states have internal predecessors, (152), 79 states have call successors, (79), 17 states have call predecessors, (79), 16 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-04-06 16:41:43,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 308 transitions. [2022-04-06 16:41:43,863 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 308 transitions. Word has length 72 [2022-04-06 16:41:43,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:43,864 INFO L478 AbstractCegarLoop]: Abstraction has 224 states and 308 transitions. [2022-04-06 16:41:43,864 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 16:41:43,864 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 308 transitions. [2022-04-06 16:41:43,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 16:41:43,865 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:43,865 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:43,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 16:41:44,088 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 16:41:44,088 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:44,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:44,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1984914564, now seen corresponding path program 3 times [2022-04-06 16:41:44,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:44,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1229124221] [2022-04-06 16:41:44,089 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:44,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1984914564, now seen corresponding path program 4 times [2022-04-06 16:41:44,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:44,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075853123] [2022-04-06 16:41:44,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:44,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:44,105 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:44,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756386580] [2022-04-06 16:41:44,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:41:44,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:44,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:44,114 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:41:44,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 16:41:44,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:41:44,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:44,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 16:41:44,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 16:41:44,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:41:44,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:44,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075853123] [2022-04-06 16:41:44,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:44,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756386580] [2022-04-06 16:41:44,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756386580] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:44,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:44,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:41:44,295 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:44,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1229124221] [2022-04-06 16:41:44,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1229124221] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:44,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:44,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:41:44,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345236332] [2022-04-06 16:41:44,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:44,296 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:41:44,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:44,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:41:44,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:41:44,296 INFO L87 Difference]: Start difference. First operand 224 states and 308 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 16:41:44,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:44,381 INFO L93 Difference]: Finished difference Result 367 states and 500 transitions. [2022-04-06 16:41:44,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:41:44,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2022-04-06 16:41:44,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:44,383 INFO L225 Difference]: With dead ends: 367 [2022-04-06 16:41:44,383 INFO L226 Difference]: Without dead ends: 230 [2022-04-06 16:41:44,385 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:41:44,385 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:44,385 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 109 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:41:44,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-04-06 16:41:44,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 214. [2022-04-06 16:41:44,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 127 states have internal predecessors, (149), 71 states have call successors, (71), 17 states have call predecessors, (71), 16 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2022-04-06 16:41:44,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 289 transitions. [2022-04-06 16:41:44,435 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 289 transitions. Word has length 77 [2022-04-06 16:41:44,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:44,435 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 289 transitions. [2022-04-06 16:41:44,436 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 16:41:44,436 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 289 transitions. [2022-04-06 16:41:44,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 16:41:44,436 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:44,437 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:44,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 16:41:44,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 16:41:44,659 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:44,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:44,660 INFO L85 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 5 times [2022-04-06 16:41:44,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:44,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1936185818] [2022-04-06 16:41:44,660 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:44,660 INFO L85 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 6 times [2022-04-06 16:41:44,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:44,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167741744] [2022-04-06 16:41:44,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:44,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:44,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:44,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640314897] [2022-04-06 16:41:44,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:41:44,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:44,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:44,677 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:41:44,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 16:41:44,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:41:44,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:44,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 16:41:44,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:45,495 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 16:41:45,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:41:49,153 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-04-06 16:41:49,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:49,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167741744] [2022-04-06 16:41:49,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:49,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640314897] [2022-04-06 16:41:49,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640314897] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:41:49,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:41:49,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2022-04-06 16:41:49,154 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:49,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1936185818] [2022-04-06 16:41:49,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1936185818] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:49,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:49,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 16:41:49,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063816068] [2022-04-06 16:41:49,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:49,154 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 16:41:49,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:49,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 16:41:49,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=419, Unknown=1, NotChecked=0, Total=506 [2022-04-06 16:41:49,155 INFO L87 Difference]: Start difference. First operand 214 states and 289 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 16:41:49,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:49,823 INFO L93 Difference]: Finished difference Result 285 states and 377 transitions. [2022-04-06 16:41:49,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 16:41:49,824 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 77 [2022-04-06 16:41:49,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:49,825 INFO L225 Difference]: With dead ends: 285 [2022-04-06 16:41:49,825 INFO L226 Difference]: Without dead ends: 283 [2022-04-06 16:41:49,826 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=147, Invalid=722, Unknown=1, NotChecked=0, Total=870 [2022-04-06 16:41:49,826 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 63 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:49,826 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 365 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 16:41:49,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-04-06 16:41:49,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 222. [2022-04-06 16:41:49,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 132 states have (on average 1.1742424242424243) internal successors, (155), 133 states have internal predecessors, (155), 71 states have call successors, (71), 19 states have call predecessors, (71), 18 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2022-04-06 16:41:49,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 295 transitions. [2022-04-06 16:41:49,875 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 295 transitions. Word has length 77 [2022-04-06 16:41:49,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:49,875 INFO L478 AbstractCegarLoop]: Abstraction has 222 states and 295 transitions. [2022-04-06 16:41:49,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 16:41:49,875 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 295 transitions. [2022-04-06 16:41:49,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 16:41:49,876 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:49,876 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:49,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 16:41:50,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 16:41:50,092 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:50,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:50,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1679616651, now seen corresponding path program 1 times [2022-04-06 16:41:50,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:50,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2135455935] [2022-04-06 16:41:50,095 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:50,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1679616651, now seen corresponding path program 2 times [2022-04-06 16:41:50,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:50,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185386745] [2022-04-06 16:41:50,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:50,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:50,114 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:50,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [537291062] [2022-04-06 16:41:50,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:41:50,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:50,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:50,116 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:41:50,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 16:41:50,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:41:50,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:50,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 16:41:50,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 35 proven. 27 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 16:41:50,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:41:52,628 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 35 proven. 27 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 16:41:52,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:52,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185386745] [2022-04-06 16:41:52,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:52,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537291062] [2022-04-06 16:41:52,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537291062] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:41:52,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:41:52,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2022-04-06 16:41:52,629 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:52,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2135455935] [2022-04-06 16:41:52,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2135455935] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:52,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:52,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:41:52,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999881935] [2022-04-06 16:41:52,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:52,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:41:52,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:52,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:41:52,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-04-06 16:41:52,631 INFO L87 Difference]: Start difference. First operand 222 states and 295 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-06 16:41:53,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:53,506 INFO L93 Difference]: Finished difference Result 309 states and 417 transitions. [2022-04-06 16:41:53,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 16:41:53,507 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 86 [2022-04-06 16:41:53,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:53,510 INFO L225 Difference]: With dead ends: 309 [2022-04-06 16:41:53,510 INFO L226 Difference]: Without dead ends: 306 [2022-04-06 16:41:53,512 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-04-06 16:41:53,512 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 57 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:53,513 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 274 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:41:53,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-04-06 16:41:53,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 287. [2022-04-06 16:41:53,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 166 states have (on average 1.1927710843373494) internal successors, (198), 167 states have internal predecessors, (198), 99 states have call successors, (99), 22 states have call predecessors, (99), 21 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-04-06 16:41:53,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 394 transitions. [2022-04-06 16:41:53,572 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 394 transitions. Word has length 86 [2022-04-06 16:41:53,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:53,573 INFO L478 AbstractCegarLoop]: Abstraction has 287 states and 394 transitions. [2022-04-06 16:41:53,573 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-06 16:41:53,573 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 394 transitions. [2022-04-06 16:41:53,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 16:41:53,574 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:53,574 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:53,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-04-06 16:41:53,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:53,783 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:53,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:53,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1455197645, now seen corresponding path program 3 times [2022-04-06 16:41:53,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:53,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [796787226] [2022-04-06 16:41:53,784 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:53,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1455197645, now seen corresponding path program 4 times [2022-04-06 16:41:53,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:53,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034200810] [2022-04-06 16:41:53,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:53,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:53,791 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:53,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068020208] [2022-04-06 16:41:53,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:41:53,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:53,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:53,793 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:41:53,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 16:41:53,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:41:53,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:53,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 16:41:53,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 16:41:54,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:41:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-04-06 16:41:56,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:56,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034200810] [2022-04-06 16:41:56,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:56,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068020208] [2022-04-06 16:41:56,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068020208] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:41:56,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:41:56,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2022-04-06 16:41:56,485 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:56,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [796787226] [2022-04-06 16:41:56,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [796787226] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:56,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:56,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 16:41:56,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097428110] [2022-04-06 16:41:56,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:56,486 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 16:41:56,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:56,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 16:41:56,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-04-06 16:41:56,487 INFO L87 Difference]: Start difference. First operand 287 states and 394 transitions. Second operand has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 16:41:58,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:58,245 INFO L93 Difference]: Finished difference Result 383 states and 524 transitions. [2022-04-06 16:41:58,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 16:41:58,246 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 91 [2022-04-06 16:41:58,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:58,248 INFO L225 Difference]: With dead ends: 383 [2022-04-06 16:41:58,248 INFO L226 Difference]: Without dead ends: 380 [2022-04-06 16:41:58,249 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 153 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 16:41:58,249 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 66 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:58,249 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 385 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 16:41:58,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-04-06 16:41:58,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 356. [2022-04-06 16:41:58,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 203 states have (on average 1.2019704433497538) internal successors, (244), 204 states have internal predecessors, (244), 127 states have call successors, (127), 26 states have call predecessors, (127), 25 states have return successors, (125), 125 states have call predecessors, (125), 125 states have call successors, (125) [2022-04-06 16:41:58,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 496 transitions. [2022-04-06 16:41:58,324 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 496 transitions. Word has length 91 [2022-04-06 16:41:58,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:58,324 INFO L478 AbstractCegarLoop]: Abstraction has 356 states and 496 transitions. [2022-04-06 16:41:58,324 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 16:41:58,325 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 496 transitions. [2022-04-06 16:41:58,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 16:41:58,327 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:58,327 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:58,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 16:41:58,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 16:41:58,551 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:58,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:58,552 INFO L85 PathProgramCache]: Analyzing trace with hash -100199667, now seen corresponding path program 7 times [2022-04-06 16:41:58,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:58,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1108991202] [2022-04-06 16:41:58,552 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:58,553 INFO L85 PathProgramCache]: Analyzing trace with hash -100199667, now seen corresponding path program 8 times [2022-04-06 16:41:58,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:58,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685238134] [2022-04-06 16:41:58,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:58,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:58,563 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:58,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894170] [2022-04-06 16:41:58,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:41:58,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:58,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:58,568 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:41:58,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 16:41:58,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:41:58,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:58,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 82 conjunts are in the unsatisfiable core [2022-04-06 16:41:58,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 57 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-04-06 16:41:59,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:42:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 78 proven. 18 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-04-06 16:42:00,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:42:00,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685238134] [2022-04-06 16:42:00,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:42:00,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894170] [2022-04-06 16:42:00,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894170] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:42:00,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:42:00,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 25 [2022-04-06 16:42:00,002 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:42:00,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1108991202] [2022-04-06 16:42:00,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1108991202] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:42:00,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:42:00,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 16:42:00,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132953184] [2022-04-06 16:42:00,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:42:00,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 16:42:00,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:00,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 16:42:00,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-04-06 16:42:00,004 INFO L87 Difference]: Start difference. First operand 356 states and 496 transitions. Second operand has 18 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 16:42:01,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:42:01,457 INFO L93 Difference]: Finished difference Result 466 states and 643 transitions. [2022-04-06 16:42:01,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 16:42:01,458 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 102 [2022-04-06 16:42:01,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:42:01,461 INFO L225 Difference]: With dead ends: 466 [2022-04-06 16:42:01,461 INFO L226 Difference]: Without dead ends: 464 [2022-04-06 16:42:01,461 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 177 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-04-06 16:42:01,462 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 62 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:42:01,462 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 461 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 16:42:01,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-04-06 16:42:01,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 446. [2022-04-06 16:42:01,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 256 states have (on average 1.19921875) internal successors, (307), 257 states have internal predecessors, (307), 159 states have call successors, (159), 31 states have call predecessors, (159), 30 states have return successors, (157), 157 states have call predecessors, (157), 157 states have call successors, (157) [2022-04-06 16:42:01,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 623 transitions. [2022-04-06 16:42:01,548 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 623 transitions. Word has length 102 [2022-04-06 16:42:01,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:42:01,549 INFO L478 AbstractCegarLoop]: Abstraction has 446 states and 623 transitions. [2022-04-06 16:42:01,549 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 16:42:01,549 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 623 transitions. [2022-04-06 16:42:01,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-04-06 16:42:01,550 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:42:01,550 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:42:01,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 16:42:01,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 16:42:01,760 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:42:01,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:42:01,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1948981098, now seen corresponding path program 5 times [2022-04-06 16:42:01,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:01,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1797418946] [2022-04-06 16:42:01,761 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:42:01,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1948981098, now seen corresponding path program 6 times [2022-04-06 16:42:01,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:42:01,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988365151] [2022-04-06 16:42:01,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:42:01,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:42:01,769 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:42:01,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1662919427] [2022-04-06 16:42:01,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:42:01,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:42:01,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:42:01,770 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:42:01,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 16:42:01,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 16:42:01,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:42:01,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 16:42:01,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:42:02,426 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:42:02,438 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:42:02,820 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 67 proven. 33 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-04-06 16:42:02,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:42:03,770 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:42:04,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:42:04,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988365151] [2022-04-06 16:42:04,486 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:42:04,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662919427] [2022-04-06 16:42:04,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662919427] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:42:04,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:42:04,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-06 16:42:04,486 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:42:04,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1797418946] [2022-04-06 16:42:04,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1797418946] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:42:04,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:42:04,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:42:04,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299327628] [2022-04-06 16:42:04,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:42:04,487 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:42:04,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:04,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:42:04,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-04-06 16:42:04,487 INFO L87 Difference]: Start difference. First operand 446 states and 623 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-04-06 16:42:07,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:42:07,606 INFO L93 Difference]: Finished difference Result 522 states and 729 transitions. [2022-04-06 16:42:07,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 16:42:07,607 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 108 [2022-04-06 16:42:07,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:42:07,610 INFO L225 Difference]: With dead ends: 522 [2022-04-06 16:42:07,610 INFO L226 Difference]: Without dead ends: 519 [2022-04-06 16:42:07,611 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2022-04-06 16:42:07,611 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 49 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:42:07,611 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 292 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 16:42:07,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-04-06 16:42:07,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 440. [2022-04-06 16:42:07,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 254 states have (on average 1.1968503937007875) internal successors, (304), 255 states have internal predecessors, (304), 155 states have call successors, (155), 31 states have call predecessors, (155), 30 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2022-04-06 16:42:07,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 612 transitions. [2022-04-06 16:42:07,710 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 612 transitions. Word has length 108 [2022-04-06 16:42:07,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:42:07,710 INFO L478 AbstractCegarLoop]: Abstraction has 440 states and 612 transitions. [2022-04-06 16:42:07,710 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-04-06 16:42:07,711 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 612 transitions. [2022-04-06 16:42:07,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 16:42:07,712 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:42:07,712 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:42:07,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 16:42:07,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 16:42:07,936 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:42:07,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:42:07,936 INFO L85 PathProgramCache]: Analyzing trace with hash 826422219, now seen corresponding path program 9 times [2022-04-06 16:42:07,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:07,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [806981334] [2022-04-06 16:42:07,937 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:42:07,937 INFO L85 PathProgramCache]: Analyzing trace with hash 826422219, now seen corresponding path program 10 times [2022-04-06 16:42:07,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:42:07,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068276327] [2022-04-06 16:42:07,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:42:07,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:42:07,945 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:42:07,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432327100] [2022-04-06 16:42:07,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:42:07,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:42:07,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:42:07,948 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:42:07,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 16:42:08,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:42:08,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:42:08,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 108 conjunts are in the unsatisfiable core [2022-04-06 16:42:08,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:42:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 43 proven. 93 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-04-06 16:42:09,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:42:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 87 proven. 18 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-04-06 16:42:10,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:42:10,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068276327] [2022-04-06 16:42:10,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:42:10,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432327100] [2022-04-06 16:42:10,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432327100] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:42:10,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:42:10,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 27 [2022-04-06 16:42:10,659 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:42:10,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [806981334] [2022-04-06 16:42:10,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [806981334] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:42:10,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:42:10,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 16:42:10,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027584475] [2022-04-06 16:42:10,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:42:10,660 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 16:42:10,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:10,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 16:42:10,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-04-06 16:42:10,661 INFO L87 Difference]: Start difference. First operand 440 states and 612 transitions. Second operand has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 16:42:12,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:42:12,028 INFO L93 Difference]: Finished difference Result 519 states and 707 transitions. [2022-04-06 16:42:12,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 16:42:12,029 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) Word has length 107 [2022-04-06 16:42:12,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:42:12,031 INFO L225 Difference]: With dead ends: 519 [2022-04-06 16:42:12,032 INFO L226 Difference]: Without dead ends: 517 [2022-04-06 16:42:12,032 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 184 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 16:42:12,033 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 84 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:42:12,033 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 473 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1219 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 16:42:12,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-04-06 16:42:12,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 452. [2022-04-06 16:42:12,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 263 states have (on average 1.1901140684410647) internal successors, (313), 264 states have internal predecessors, (313), 155 states have call successors, (155), 34 states have call predecessors, (155), 33 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2022-04-06 16:42:12,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 621 transitions. [2022-04-06 16:42:12,161 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 621 transitions. Word has length 107 [2022-04-06 16:42:12,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:42:12,162 INFO L478 AbstractCegarLoop]: Abstraction has 452 states and 621 transitions. [2022-04-06 16:42:12,162 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 16:42:12,162 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 621 transitions. [2022-04-06 16:42:12,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-06 16:42:12,163 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:42:12,163 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:42:12,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 16:42:12,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:42:12,379 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:42:12,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:42:12,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1002671399, now seen corresponding path program 7 times [2022-04-06 16:42:12,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:12,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1606376664] [2022-04-06 16:42:12,380 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:42:12,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1002671399, now seen corresponding path program 8 times [2022-04-06 16:42:12,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:42:12,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244709899] [2022-04-06 16:42:12,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:42:12,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:42:12,390 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:42:12,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1764087675] [2022-04-06 16:42:12,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:42:12,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:42:12,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:42:12,391 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:42:12,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 16:42:12,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:42:12,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:42:12,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 74 conjunts are in the unsatisfiable core [2022-04-06 16:42:12,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:42:13,304 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 102 proven. 30 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-04-06 16:42:13,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:42:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 102 proven. 30 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-04-06 16:42:15,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:42:15,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244709899] [2022-04-06 16:42:15,826 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:42:15,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764087675] [2022-04-06 16:42:15,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764087675] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:42:15,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:42:15,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 29 [2022-04-06 16:42:15,827 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:42:15,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1606376664] [2022-04-06 16:42:15,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1606376664] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:42:15,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:42:15,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 16:42:15,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847682786] [2022-04-06 16:42:15,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:42:15,827 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 16:42:15,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:15,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 16:42:15,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2022-04-06 16:42:15,828 INFO L87 Difference]: Start difference. First operand 452 states and 621 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 16:42:16,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:42:16,580 INFO L93 Difference]: Finished difference Result 545 states and 747 transitions. [2022-04-06 16:42:16,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 16:42:16,580 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 111 [2022-04-06 16:42:16,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:42:16,583 INFO L225 Difference]: With dead ends: 545 [2022-04-06 16:42:16,583 INFO L226 Difference]: Without dead ends: 542 [2022-04-06 16:42:16,584 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 191 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 16:42:16,584 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 47 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:42:16,584 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 387 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 16:42:16,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-04-06 16:42:16,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 485. [2022-04-06 16:42:16,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 281 states have (on average 1.1921708185053381) internal successors, (335), 282 states have internal predecessors, (335), 167 states have call successors, (167), 37 states have call predecessors, (167), 36 states have return successors, (165), 165 states have call predecessors, (165), 165 states have call successors, (165) [2022-04-06 16:42:16,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 667 transitions. [2022-04-06 16:42:16,708 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 667 transitions. Word has length 111 [2022-04-06 16:42:16,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:42:16,709 INFO L478 AbstractCegarLoop]: Abstraction has 485 states and 667 transitions. [2022-04-06 16:42:16,709 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 16:42:16,709 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 667 transitions. [2022-04-06 16:42:16,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 16:42:16,710 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:42:16,711 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:42:16,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-04-06 16:42:16,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:42:16,923 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:42:16,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:42:16,924 INFO L85 PathProgramCache]: Analyzing trace with hash 890766036, now seen corresponding path program 9 times [2022-04-06 16:42:16,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:16,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [788864101] [2022-04-06 16:42:16,924 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:42:16,924 INFO L85 PathProgramCache]: Analyzing trace with hash 890766036, now seen corresponding path program 10 times [2022-04-06 16:42:16,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:42:16,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917608184] [2022-04-06 16:42:16,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:42:16,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:42:16,931 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:42:16,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203058573] [2022-04-06 16:42:16,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:42:16,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:42:16,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:42:16,939 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:42:16,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 16:42:16,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:42:16,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:42:16,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 16:42:16,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:42:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 95 proven. 56 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-04-06 16:42:17,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:42:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 105 proven. 29 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-04-06 16:42:19,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:42:19,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917608184] [2022-04-06 16:42:19,315 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:42:19,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203058573] [2022-04-06 16:42:19,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203058573] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:42:19,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:42:19,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2022-04-06 16:42:19,316 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:42:19,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [788864101] [2022-04-06 16:42:19,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [788864101] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:42:19,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:42:19,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 16:42:19,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598672748] [2022-04-06 16:42:19,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:42:19,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 16:42:19,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:19,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 16:42:19,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2022-04-06 16:42:19,317 INFO L87 Difference]: Start difference. First operand 485 states and 667 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 16:42:20,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:42:20,735 INFO L93 Difference]: Finished difference Result 576 states and 793 transitions. [2022-04-06 16:42:20,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 16:42:20,735 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 113 [2022-04-06 16:42:20,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:42:20,738 INFO L225 Difference]: With dead ends: 576 [2022-04-06 16:42:20,738 INFO L226 Difference]: Without dead ends: 573 [2022-04-06 16:42:20,738 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 196 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 16:42:20,739 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 64 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 16:42:20,739 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 454 Invalid, 1405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1350 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 16:42:20,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-04-06 16:42:20,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 550. [2022-04-06 16:42:20,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 315 states have (on average 1.2) internal successors, (378), 316 states have internal predecessors, (378), 195 states have call successors, (195), 40 states have call predecessors, (195), 39 states have return successors, (193), 193 states have call predecessors, (193), 193 states have call successors, (193) [2022-04-06 16:42:20,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 766 transitions. [2022-04-06 16:42:20,893 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 766 transitions. Word has length 113 [2022-04-06 16:42:20,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:42:20,893 INFO L478 AbstractCegarLoop]: Abstraction has 550 states and 766 transitions. [2022-04-06 16:42:20,893 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 16:42:20,893 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 766 transitions. [2022-04-06 16:42:20,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-04-06 16:42:20,895 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:42:20,895 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:42:20,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-04-06 16:42:21,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-04-06 16:42:21,111 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:42:21,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:42:21,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1938711081, now seen corresponding path program 11 times [2022-04-06 16:42:21,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:21,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1481718815] [2022-04-06 16:42:21,112 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:42:21,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1938711081, now seen corresponding path program 12 times [2022-04-06 16:42:21,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:42:21,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570734932] [2022-04-06 16:42:21,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:42:21,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:42:21,120 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:42:21,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306486717] [2022-04-06 16:42:21,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:42:21,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:42:21,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:42:21,121 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:42:21,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 16:42:21,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 16:42:21,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:42:21,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 90 conjunts are in the unsatisfiable core [2022-04-06 16:42:21,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:42:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 46 proven. 85 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-04-06 16:42:22,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:42:24,577 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:42:25,600 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 43 proven. 79 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-04-06 16:42:25,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:42:25,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570734932] [2022-04-06 16:42:25,600 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:42:25,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306486717] [2022-04-06 16:42:25,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306486717] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:42:25,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:42:25,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 37 [2022-04-06 16:42:25,601 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:42:25,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1481718815] [2022-04-06 16:42:25,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1481718815] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:42:25,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:42:25,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 16:42:25,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772181029] [2022-04-06 16:42:25,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:42:25,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 16:42:25,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:25,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 16:42:25,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 16:42:25,602 INFO L87 Difference]: Start difference. First operand 550 states and 766 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 6 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 16:42:27,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:42:27,419 INFO L93 Difference]: Finished difference Result 626 states and 860 transitions. [2022-04-06 16:42:27,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 16:42:27,419 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 6 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) Word has length 116 [2022-04-06 16:42:27,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:42:27,423 INFO L225 Difference]: With dead ends: 626 [2022-04-06 16:42:27,423 INFO L226 Difference]: Without dead ends: 623 [2022-04-06 16:42:27,424 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=396, Invalid=2054, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 16:42:27,424 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 112 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:42:27,424 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 375 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 16:42:27,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-04-06 16:42:27,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 518. [2022-04-06 16:42:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 299 states have (on average 1.193979933110368) internal successors, (357), 300 states have internal predecessors, (357), 179 states have call successors, (179), 40 states have call predecessors, (179), 39 states have return successors, (177), 177 states have call predecessors, (177), 177 states have call successors, (177) [2022-04-06 16:42:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 713 transitions. [2022-04-06 16:42:27,587 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 713 transitions. Word has length 116 [2022-04-06 16:42:27,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:42:27,587 INFO L478 AbstractCegarLoop]: Abstraction has 518 states and 713 transitions. [2022-04-06 16:42:27,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 6 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 16:42:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 713 transitions. [2022-04-06 16:42:27,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-04-06 16:42:27,589 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:42:27,589 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:42:27,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 16:42:27,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 16:42:27,791 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:42:27,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:42:27,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1687072417, now seen corresponding path program 13 times [2022-04-06 16:42:27,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:27,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [357624559] [2022-04-06 16:42:27,792 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:42:27,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1687072417, now seen corresponding path program 14 times [2022-04-06 16:42:27,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:42:27,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612252441] [2022-04-06 16:42:27,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:42:27,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:42:27,798 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:42:27,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121027010] [2022-04-06 16:42:27,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:42:27,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:42:27,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:42:27,799 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:42:27,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 16:42:27,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:42:27,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:42:27,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 105 conjunts are in the unsatisfiable core [2022-04-06 16:42:27,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:42:28,853 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 87 proven. 83 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 16:42:28,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:42:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 122 proven. 17 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-04-06 16:42:31,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:42:31,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612252441] [2022-04-06 16:42:31,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:42:31,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121027010] [2022-04-06 16:42:31,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121027010] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:42:31,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:42:31,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 29 [2022-04-06 16:42:31,901 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:42:31,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [357624559] [2022-04-06 16:42:31,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [357624559] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:42:31,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:42:31,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 16:42:31,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201338315] [2022-04-06 16:42:31,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:42:31,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 16:42:31,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:31,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 16:42:31,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2022-04-06 16:42:31,902 INFO L87 Difference]: Start difference. First operand 518 states and 713 transitions. Second operand has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 16:42:33,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:42:33,465 INFO L93 Difference]: Finished difference Result 617 states and 846 transitions. [2022-04-06 16:42:33,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 16:42:33,466 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 6 states have call successors, (17) Word has length 116 [2022-04-06 16:42:33,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:42:33,468 INFO L225 Difference]: With dead ends: 617 [2022-04-06 16:42:33,468 INFO L226 Difference]: Without dead ends: 614 [2022-04-06 16:42:33,469 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 200 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 16:42:33,469 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 69 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 16:42:33,469 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 440 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 16:42:33,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-04-06 16:42:33,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 587. [2022-04-06 16:42:33,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 336 states have (on average 1.1994047619047619) internal successors, (403), 337 states have internal predecessors, (403), 207 states have call successors, (207), 44 states have call predecessors, (207), 43 states have return successors, (205), 205 states have call predecessors, (205), 205 states have call successors, (205) [2022-04-06 16:42:33,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 815 transitions. [2022-04-06 16:42:33,654 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 815 transitions. Word has length 116 [2022-04-06 16:42:33,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:42:33,656 INFO L478 AbstractCegarLoop]: Abstraction has 587 states and 815 transitions. [2022-04-06 16:42:33,656 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 16:42:33,656 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 815 transitions. [2022-04-06 16:42:33,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 16:42:33,658 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:42:33,658 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:42:33,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 16:42:33,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:42:33,871 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:42:33,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:42:33,872 INFO L85 PathProgramCache]: Analyzing trace with hash 764235165, now seen corresponding path program 15 times [2022-04-06 16:42:33,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:33,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1950791201] [2022-04-06 16:42:33,872 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:42:33,873 INFO L85 PathProgramCache]: Analyzing trace with hash 764235165, now seen corresponding path program 16 times [2022-04-06 16:42:33,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:42:33,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380262029] [2022-04-06 16:42:33,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:42:33,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:42:33,879 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:42:33,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [560956792] [2022-04-06 16:42:33,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:42:33,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:42:33,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:42:33,881 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:42:33,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 16:42:33,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:42:33,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:42:33,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 101 conjunts are in the unsatisfiable core [2022-04-06 16:42:33,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:42:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 56 proven. 64 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-04-06 16:42:36,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:42:41,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:42:41,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380262029] [2022-04-06 16:42:41,785 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:42:41,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560956792] [2022-04-06 16:42:41,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560956792] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:42:41,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:42:41,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-04-06 16:42:41,786 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:42:41,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1950791201] [2022-04-06 16:42:41,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1950791201] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:42:41,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:42:41,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 16:42:41,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564551224] [2022-04-06 16:42:41,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:42:41,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 16:42:41,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:41,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 16:42:41,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 16:42:41,788 INFO L87 Difference]: Start difference. First operand 587 states and 815 transitions. Second operand has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 16:42:45,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:42:45,232 INFO L93 Difference]: Finished difference Result 695 states and 957 transitions. [2022-04-06 16:42:45,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 16:42:45,232 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 121 [2022-04-06 16:42:45,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:42:45,235 INFO L225 Difference]: With dead ends: 695 [2022-04-06 16:42:45,235 INFO L226 Difference]: Without dead ends: 692 [2022-04-06 16:42:45,236 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=381, Invalid=2271, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 16:42:45,237 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 122 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 2085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:42:45,237 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 474 Invalid, 2085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 1920 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 16:42:45,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-04-06 16:42:45,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 656. [2022-04-06 16:42:45,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 373 states have (on average 1.2037533512064342) internal successors, (449), 374 states have internal predecessors, (449), 235 states have call successors, (235), 48 states have call predecessors, (235), 47 states have return successors, (233), 233 states have call predecessors, (233), 233 states have call successors, (233) [2022-04-06 16:42:45,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 917 transitions. [2022-04-06 16:42:45,426 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 917 transitions. Word has length 121 [2022-04-06 16:42:45,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:42:45,427 INFO L478 AbstractCegarLoop]: Abstraction has 656 states and 917 transitions. [2022-04-06 16:42:45,427 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 16:42:45,427 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 917 transitions. [2022-04-06 16:42:45,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-04-06 16:42:45,429 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:42:45,429 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:42:45,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 16:42:45,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:42:45,643 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:42:45,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:42:45,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1339589678, now seen corresponding path program 1 times [2022-04-06 16:42:45,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:45,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [795807323] [2022-04-06 16:42:45,644 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:42:45,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1339589678, now seen corresponding path program 2 times [2022-04-06 16:42:45,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:42:45,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944035298] [2022-04-06 16:42:45,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:42:45,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:42:45,654 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:42:45,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308880228] [2022-04-06 16:42:45,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:42:45,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:42:45,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:42:45,656 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:42:45,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 16:42:45,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:42:45,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:42:45,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 100 conjunts are in the unsatisfiable core [2022-04-06 16:42:45,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:42:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 96 proven. 105 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-04-06 16:42:46,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:42:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 119 proven. 18 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-04-06 16:42:47,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:42:47,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944035298] [2022-04-06 16:42:47,261 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:42:47,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308880228] [2022-04-06 16:42:47,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308880228] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:42:47,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:42:47,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 25 [2022-04-06 16:42:47,261 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:42:47,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [795807323] [2022-04-06 16:42:47,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [795807323] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:42:47,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:42:47,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 16:42:47,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693634058] [2022-04-06 16:42:47,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:42:47,262 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 16:42:47,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:47,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 16:42:47,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-04-06 16:42:47,262 INFO L87 Difference]: Start difference. First operand 656 states and 917 transitions. Second operand has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-06 16:42:48,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:42:48,346 INFO L93 Difference]: Finished difference Result 767 states and 1065 transitions. [2022-04-06 16:42:48,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 16:42:48,346 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) Word has length 124 [2022-04-06 16:42:48,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:42:48,349 INFO L225 Difference]: With dead ends: 767 [2022-04-06 16:42:48,350 INFO L226 Difference]: Without dead ends: 765 [2022-04-06 16:42:48,350 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 221 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 16:42:48,351 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 81 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 16:42:48,351 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 471 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 16:42:48,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-04-06 16:42:48,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 743. [2022-04-06 16:42:48,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 423 states have (on average 1.2033096926713949) internal successors, (509), 424 states have internal predecessors, (509), 267 states have call successors, (267), 53 states have call predecessors, (267), 52 states have return successors, (265), 265 states have call predecessors, (265), 265 states have call successors, (265) [2022-04-06 16:42:48,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1041 transitions. [2022-04-06 16:42:48,604 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1041 transitions. Word has length 124 [2022-04-06 16:42:48,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:42:48,604 INFO L478 AbstractCegarLoop]: Abstraction has 743 states and 1041 transitions. [2022-04-06 16:42:48,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-06 16:42:48,605 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1041 transitions. [2022-04-06 16:42:48,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 16:42:48,607 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:42:48,607 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:42:48,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 16:42:48,825 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-04-06 16:42:48,825 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:42:48,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:42:48,825 INFO L85 PathProgramCache]: Analyzing trace with hash -590650772, now seen corresponding path program 3 times [2022-04-06 16:42:48,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:48,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1658550642] [2022-04-06 16:42:48,826 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:42:48,826 INFO L85 PathProgramCache]: Analyzing trace with hash -590650772, now seen corresponding path program 4 times [2022-04-06 16:42:48,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:42:48,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439655372] [2022-04-06 16:42:48,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:42:48,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:42:48,833 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:42:48,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785717843] [2022-04-06 16:42:48,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:42:48,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:42:48,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:42:48,847 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:42:48,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 16:42:48,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:42:48,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:42:48,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 117 conjunts are in the unsatisfiable core [2022-04-06 16:42:48,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:42:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 98 proven. 127 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 16:42:50,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:42:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 154 proven. 16 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-04-06 16:42:51,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:42:51,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439655372] [2022-04-06 16:42:51,725 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:42:51,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785717843] [2022-04-06 16:42:51,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785717843] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:42:51,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:42:51,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 30 [2022-04-06 16:42:51,726 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:42:51,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1658550642] [2022-04-06 16:42:51,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1658550642] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:42:51,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:42:51,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 16:42:51,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809266899] [2022-04-06 16:42:51,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:42:51,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 16:42:51,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:51,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 16:42:51,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2022-04-06 16:42:51,727 INFO L87 Difference]: Start difference. First operand 743 states and 1041 transitions. Second operand has 22 states, 20 states have (on average 2.45) internal successors, (49), 18 states have internal predecessors, (49), 9 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 8 states have call successors, (18) [2022-04-06 16:42:53,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:42:53,663 INFO L93 Difference]: Finished difference Result 863 states and 1198 transitions. [2022-04-06 16:42:53,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 16:42:53,664 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.45) internal successors, (49), 18 states have internal predecessors, (49), 9 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 8 states have call successors, (18) Word has length 129 [2022-04-06 16:42:53,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:42:53,668 INFO L225 Difference]: With dead ends: 863 [2022-04-06 16:42:53,668 INFO L226 Difference]: Without dead ends: 861 [2022-04-06 16:42:53,668 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 226 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=210, Invalid=1122, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 16:42:53,668 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 90 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 1947 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 2024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:42:53,669 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 606 Invalid, 2024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1947 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 16:42:53,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-04-06 16:42:53,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 830. [2022-04-06 16:42:53,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 473 states have (on average 1.2029598308668077) internal successors, (569), 474 states have internal predecessors, (569), 299 states have call successors, (299), 58 states have call predecessors, (299), 57 states have return successors, (297), 297 states have call predecessors, (297), 297 states have call successors, (297) [2022-04-06 16:42:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1165 transitions. [2022-04-06 16:42:53,889 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1165 transitions. Word has length 129 [2022-04-06 16:42:53,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:42:53,889 INFO L478 AbstractCegarLoop]: Abstraction has 830 states and 1165 transitions. [2022-04-06 16:42:53,890 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.45) internal successors, (49), 18 states have internal predecessors, (49), 9 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 8 states have call successors, (18) [2022-04-06 16:42:53,890 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1165 transitions. [2022-04-06 16:42:53,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-06 16:42:53,892 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:42:53,892 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:42:53,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 16:42:54,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 16:42:54,095 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:42:54,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:42:54,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1469141304, now seen corresponding path program 17 times [2022-04-06 16:42:54,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:54,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1487995343] [2022-04-06 16:42:54,096 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:42:54,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1469141304, now seen corresponding path program 18 times [2022-04-06 16:42:54,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:42:54,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782061997] [2022-04-06 16:42:54,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:42:54,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:42:54,104 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:42:54,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97019719] [2022-04-06 16:42:54,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:42:54,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:42:54,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:42:54,110 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:42:54,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 16:42:54,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 16:42:54,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:42:54,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:42:54,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:42:54,433 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 38 proven. 39 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-04-06 16:42:54,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:42:54,701 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 38 proven. 39 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-04-06 16:42:54,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:42:54,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782061997] [2022-04-06 16:42:54,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:42:54,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97019719] [2022-04-06 16:42:54,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97019719] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:42:54,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:42:54,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2022-04-06 16:42:54,702 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:42:54,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1487995343] [2022-04-06 16:42:54,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1487995343] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:42:54,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:42:54,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:42:54,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030276862] [2022-04-06 16:42:54,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:42:54,703 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:42:54,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:54,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:42:54,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:42:54,704 INFO L87 Difference]: Start difference. First operand 830 states and 1165 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-04-06 16:42:55,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:42:55,358 INFO L93 Difference]: Finished difference Result 1469 states and 2156 transitions. [2022-04-06 16:42:55,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 16:42:55,359 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 133 [2022-04-06 16:42:55,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:42:55,365 INFO L225 Difference]: With dead ends: 1469 [2022-04-06 16:42:55,365 INFO L226 Difference]: Without dead ends: 1098 [2022-04-06 16:42:55,366 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 253 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:42:55,367 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 9 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:42:55,367 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 337 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:42:55,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2022-04-06 16:42:55,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 973. [2022-04-06 16:42:55,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 535 states have (on average 1.2242990654205608) internal successors, (655), 551 states have internal predecessors, (655), 384 states have call successors, (384), 54 states have call predecessors, (384), 53 states have return successors, (382), 367 states have call predecessors, (382), 382 states have call successors, (382) [2022-04-06 16:42:55,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1421 transitions. [2022-04-06 16:42:55,668 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1421 transitions. Word has length 133 [2022-04-06 16:42:55,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:42:55,668 INFO L478 AbstractCegarLoop]: Abstraction has 973 states and 1421 transitions. [2022-04-06 16:42:55,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-04-06 16:42:55,668 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1421 transitions. [2022-04-06 16:42:55,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-06 16:42:55,670 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:42:55,670 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:42:55,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 16:42:55,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 16:42:55,887 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:42:55,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:42:55,887 INFO L85 PathProgramCache]: Analyzing trace with hash -914829018, now seen corresponding path program 19 times [2022-04-06 16:42:55,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:55,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [517632557] [2022-04-06 16:42:55,888 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:42:55,888 INFO L85 PathProgramCache]: Analyzing trace with hash -914829018, now seen corresponding path program 20 times [2022-04-06 16:42:55,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:42:55,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383763363] [2022-04-06 16:42:55,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:42:55,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:42:55,895 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:42:55,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [417147407] [2022-04-06 16:42:55,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:42:55,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:42:55,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:42:55,900 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:42:55,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 16:42:55,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:42:55,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:42:55,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 16:42:55,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:42:57,052 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 133 proven. 88 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-04-06 16:42:57,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:42:59,141 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 134 proven. 60 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-04-06 16:42:59,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:42:59,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383763363] [2022-04-06 16:42:59,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:42:59,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417147407] [2022-04-06 16:42:59,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417147407] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:42:59,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:42:59,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 31 [2022-04-06 16:42:59,142 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:42:59,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [517632557] [2022-04-06 16:42:59,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [517632557] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:42:59,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:42:59,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 16:42:59,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66853840] [2022-04-06 16:42:59,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:42:59,143 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 16:42:59,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:59,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 16:42:59,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2022-04-06 16:42:59,143 INFO L87 Difference]: Start difference. First operand 973 states and 1421 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 16:43:00,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:43:00,407 INFO L93 Difference]: Finished difference Result 1104 states and 1609 transitions. [2022-04-06 16:43:00,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 16:43:00,408 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 133 [2022-04-06 16:43:00,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:43:00,415 INFO L225 Difference]: With dead ends: 1104 [2022-04-06 16:43:00,415 INFO L226 Difference]: Without dead ends: 1101 [2022-04-06 16:43:00,415 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 232 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 16:43:00,416 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 52 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:43:00,416 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 348 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 16:43:00,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2022-04-06 16:43:00,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1012. [2022-04-06 16:43:00,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 555 states have (on average 1.2252252252252251) internal successors, (680), 571 states have internal predecessors, (680), 400 states have call successors, (400), 57 states have call predecessors, (400), 56 states have return successors, (398), 383 states have call predecessors, (398), 398 states have call successors, (398) [2022-04-06 16:43:00,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1478 transitions. [2022-04-06 16:43:00,714 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1478 transitions. Word has length 133 [2022-04-06 16:43:00,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:43:00,714 INFO L478 AbstractCegarLoop]: Abstraction has 1012 states and 1478 transitions. [2022-04-06 16:43:00,714 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 16:43:00,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1478 transitions. [2022-04-06 16:43:00,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 16:43:00,716 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:43:00,716 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:43:00,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 16:43:00,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 16:43:00,931 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:43:00,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:43:00,932 INFO L85 PathProgramCache]: Analyzing trace with hash -112069451, now seen corresponding path program 21 times [2022-04-06 16:43:00,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:43:00,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1960167707] [2022-04-06 16:43:00,932 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:43:00,932 INFO L85 PathProgramCache]: Analyzing trace with hash -112069451, now seen corresponding path program 22 times [2022-04-06 16:43:00,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:43:00,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976557821] [2022-04-06 16:43:00,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:43:00,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:43:00,938 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:43:00,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974279939] [2022-04-06 16:43:00,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:43:00,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:43:00,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:43:00,943 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:43:00,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 16:43:01,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:43:01,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:43:01,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-06 16:43:01,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:43:02,588 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:02,805 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:02,920 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:03,466 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:03,469 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:04,891 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 122 proven. 85 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-04-06 16:43:04,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:43:13,668 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:13,670 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 125 proven. 71 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2022-04-06 16:43:19,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:43:19,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976557821] [2022-04-06 16:43:19,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:43:19,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974279939] [2022-04-06 16:43:19,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974279939] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:43:19,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:43:19,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18] total 37 [2022-04-06 16:43:19,510 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:43:19,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1960167707] [2022-04-06 16:43:19,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1960167707] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:43:19,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:43:19,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 16:43:19,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947191824] [2022-04-06 16:43:19,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:43:19,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 16:43:19,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:43:19,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 16:43:19,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1130, Unknown=1, NotChecked=0, Total=1332 [2022-04-06 16:43:19,511 INFO L87 Difference]: Start difference. First operand 1012 states and 1478 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 16:43:24,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:43:24,429 INFO L93 Difference]: Finished difference Result 1157 states and 1686 transitions. [2022-04-06 16:43:24,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 16:43:24,430 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 135 [2022-04-06 16:43:24,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:43:24,435 INFO L225 Difference]: With dead ends: 1157 [2022-04-06 16:43:24,436 INFO L226 Difference]: Without dead ends: 1154 [2022-04-06 16:43:24,436 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 233 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=287, Invalid=1692, Unknown=1, NotChecked=0, Total=1980 [2022-04-06 16:43:24,437 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 84 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 1924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 16:43:24,437 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 488 Invalid, 1924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1524 Invalid, 0 Unknown, 330 Unchecked, 1.6s Time] [2022-04-06 16:43:24,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2022-04-06 16:43:24,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1051. [2022-04-06 16:43:24,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 575 states have (on average 1.2260869565217392) internal successors, (705), 591 states have internal predecessors, (705), 416 states have call successors, (416), 60 states have call predecessors, (416), 59 states have return successors, (414), 399 states have call predecessors, (414), 414 states have call successors, (414) [2022-04-06 16:43:24,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1535 transitions. [2022-04-06 16:43:24,758 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1535 transitions. Word has length 135 [2022-04-06 16:43:24,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:43:24,758 INFO L478 AbstractCegarLoop]: Abstraction has 1051 states and 1535 transitions. [2022-04-06 16:43:24,759 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 16:43:24,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1535 transitions. [2022-04-06 16:43:24,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-04-06 16:43:24,761 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:43:24,761 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:43:24,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 16:43:24,984 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 16:43:24,984 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:43:24,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:43:24,985 INFO L85 PathProgramCache]: Analyzing trace with hash -16499977, now seen corresponding path program 11 times [2022-04-06 16:43:24,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:43:24,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [766414165] [2022-04-06 16:43:24,985 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:43:24,985 INFO L85 PathProgramCache]: Analyzing trace with hash -16499977, now seen corresponding path program 12 times [2022-04-06 16:43:24,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:43:24,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448034759] [2022-04-06 16:43:24,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:43:24,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:43:24,992 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:43:24,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132934982] [2022-04-06 16:43:24,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:43:24,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:43:24,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:43:24,993 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:43:24,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 16:43:25,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:43:25,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:43:25,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 16:43:25,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:43:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 126 proven. 42 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2022-04-06 16:43:25,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:43:29,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:43:29,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448034759] [2022-04-06 16:43:29,226 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:43:29,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132934982] [2022-04-06 16:43:29,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132934982] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:43:29,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:43:29,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-04-06 16:43:29,226 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:43:29,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [766414165] [2022-04-06 16:43:29,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [766414165] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:43:29,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:43:29,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 16:43:29,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191916977] [2022-04-06 16:43:29,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:43:29,227 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 16:43:29,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:43:29,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 16:43:29,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=199, Unknown=1, NotChecked=0, Total=240 [2022-04-06 16:43:29,228 INFO L87 Difference]: Start difference. First operand 1051 states and 1535 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2022-04-06 16:43:30,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:43:30,214 INFO L93 Difference]: Finished difference Result 1120 states and 1606 transitions. [2022-04-06 16:43:30,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 16:43:30,215 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) Word has length 132 [2022-04-06 16:43:30,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:43:30,221 INFO L225 Difference]: With dead ends: 1120 [2022-04-06 16:43:30,221 INFO L226 Difference]: Without dead ends: 1118 [2022-04-06 16:43:30,223 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=105, Invalid=446, Unknown=1, NotChecked=0, Total=552 [2022-04-06 16:43:30,224 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 61 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:43:30,224 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 217 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:43:30,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-04-06 16:43:30,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1082. [2022-04-06 16:43:30,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 599 states have (on average 1.2170283806343907) internal successors, (729), 617 states have internal predecessors, (729), 420 states have call successors, (420), 63 states have call predecessors, (420), 62 states have return successors, (418), 401 states have call predecessors, (418), 418 states have call successors, (418) [2022-04-06 16:43:30,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 1567 transitions. [2022-04-06 16:43:30,690 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 1567 transitions. Word has length 132 [2022-04-06 16:43:30,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:43:30,690 INFO L478 AbstractCegarLoop]: Abstraction has 1082 states and 1567 transitions. [2022-04-06 16:43:30,690 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2022-04-06 16:43:30,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 1567 transitions. [2022-04-06 16:43:30,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-04-06 16:43:30,692 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:43:30,693 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:43:30,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 16:43:30,916 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:43:30,916 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:43:30,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:43:30,916 INFO L85 PathProgramCache]: Analyzing trace with hash -2035738456, now seen corresponding path program 23 times [2022-04-06 16:43:30,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:43:30,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [842470830] [2022-04-06 16:43:30,917 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:43:30,917 INFO L85 PathProgramCache]: Analyzing trace with hash -2035738456, now seen corresponding path program 24 times [2022-04-06 16:43:30,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:43:30,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125451328] [2022-04-06 16:43:30,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:43:30,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:43:30,923 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:43:30,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28205848] [2022-04-06 16:43:30,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:43:30,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:43:30,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:43:30,925 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:43:30,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 16:43:31,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 16:43:31,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:43:31,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 95 conjunts are in the unsatisfiable core [2022-04-06 16:43:31,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:43:32,881 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 66 proven. 115 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2022-04-06 16:43:32,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:43:37,916 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:37,920 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:41,978 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 63 proven. 109 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 16:43:41,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:43:41,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125451328] [2022-04-06 16:43:41,979 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:43:41,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28205848] [2022-04-06 16:43:41,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28205848] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:43:41,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:43:41,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 41 [2022-04-06 16:43:41,979 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:43:41,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [842470830] [2022-04-06 16:43:41,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [842470830] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:43:41,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:43:41,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 16:43:41,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500448798] [2022-04-06 16:43:41,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:43:41,980 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 16:43:41,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:43:41,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 16:43:41,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1389, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 16:43:41,981 INFO L87 Difference]: Start difference. First operand 1082 states and 1567 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 16:43:44,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:43:44,508 INFO L93 Difference]: Finished difference Result 1231 states and 1752 transitions. [2022-04-06 16:43:44,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 16:43:44,509 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 138 [2022-04-06 16:43:44,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:43:44,514 INFO L225 Difference]: With dead ends: 1231 [2022-04-06 16:43:44,514 INFO L226 Difference]: Without dead ends: 1122 [2022-04-06 16:43:44,515 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=468, Invalid=2502, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 16:43:44,516 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 90 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 1519 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 1647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 16:43:44,516 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 381 Invalid, 1647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1519 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 16:43:44,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-04-06 16:43:44,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1036. [2022-04-06 16:43:44,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 578 states have (on average 1.2093425605536332) internal successors, (699), 595 states have internal predecessors, (699), 394 states have call successors, (394), 64 states have call predecessors, (394), 63 states have return successors, (392), 376 states have call predecessors, (392), 392 states have call successors, (392) [2022-04-06 16:43:44,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1485 transitions. [2022-04-06 16:43:44,949 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1485 transitions. Word has length 138 [2022-04-06 16:43:44,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:43:44,949 INFO L478 AbstractCegarLoop]: Abstraction has 1036 states and 1485 transitions. [2022-04-06 16:43:44,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 16:43:44,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1485 transitions. [2022-04-06 16:43:44,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-04-06 16:43:44,951 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:43:44,951 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:43:44,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 16:43:45,174 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-04-06 16:43:45,174 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:43:45,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:43:45,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1937049344, now seen corresponding path program 25 times [2022-04-06 16:43:45,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:43:45,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [534065248] [2022-04-06 16:43:45,175 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:43:45,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1937049344, now seen corresponding path program 26 times [2022-04-06 16:43:45,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:43:45,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782212363] [2022-04-06 16:43:45,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:43:45,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:43:45,182 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:43:45,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118958454] [2022-04-06 16:43:45,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:43:45,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:43:45,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:43:45,184 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:43:45,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 16:43:45,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:43:45,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:43:45,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 104 conjunts are in the unsatisfiable core [2022-04-06 16:43:45,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:43:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 126 proven. 127 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-04-06 16:43:46,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:43:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 160 proven. 41 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-04-06 16:43:50,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:43:50,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782212363] [2022-04-06 16:43:50,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:43:50,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118958454] [2022-04-06 16:43:50,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118958454] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:43:50,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:43:50,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 32 [2022-04-06 16:43:50,774 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:43:50,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [534065248] [2022-04-06 16:43:50,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [534065248] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:43:50,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:43:50,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 16:43:50,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668190176] [2022-04-06 16:43:50,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:43:50,775 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 16:43:50,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:43:50,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 16:43:50,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2022-04-06 16:43:50,776 INFO L87 Difference]: Start difference. First operand 1036 states and 1485 transitions. Second operand has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 16:43:56,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:43:56,321 INFO L93 Difference]: Finished difference Result 1178 states and 1688 transitions. [2022-04-06 16:43:56,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 16:43:56,322 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 8 states have call successors, (21) Word has length 138 [2022-04-06 16:43:56,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:43:56,328 INFO L225 Difference]: With dead ends: 1178 [2022-04-06 16:43:56,328 INFO L226 Difference]: Without dead ends: 1175 [2022-04-06 16:43:56,328 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 241 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=194, Invalid=1212, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 16:43:56,329 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 74 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 1727 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:43:56,329 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 528 Invalid, 1826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1727 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-04-06 16:43:56,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2022-04-06 16:43:56,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1129. [2022-04-06 16:43:56,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 625 states have (on average 1.2144) internal successors, (759), 643 states have internal predecessors, (759), 436 states have call successors, (436), 68 states have call predecessors, (436), 67 states have return successors, (434), 417 states have call predecessors, (434), 434 states have call successors, (434) [2022-04-06 16:43:56,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1629 transitions. [2022-04-06 16:43:56,722 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1629 transitions. Word has length 138 [2022-04-06 16:43:56,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:43:56,723 INFO L478 AbstractCegarLoop]: Abstraction has 1129 states and 1629 transitions. [2022-04-06 16:43:56,723 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 16:43:56,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1629 transitions. [2022-04-06 16:43:56,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-04-06 16:43:56,725 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:43:56,726 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:43:56,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 16:43:56,948 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:43:56,948 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:43:56,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:43:56,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1588704448, now seen corresponding path program 27 times [2022-04-06 16:43:56,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:43:56,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2077314050] [2022-04-06 16:43:56,949 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:43:56,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1588704448, now seen corresponding path program 28 times [2022-04-06 16:43:56,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:43:56,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395212850] [2022-04-06 16:43:56,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:43:56,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:43:56,956 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:43:56,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286449512] [2022-04-06 16:43:56,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:43:56,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:43:56,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:43:56,957 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:43:56,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 16:43:57,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:43:57,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:43:57,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 105 conjunts are in the unsatisfiable core [2022-04-06 16:43:57,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:44:02,039 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 143 proven. 125 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-04-06 16:44:02,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:44:09,917 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:44:09,919 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:44:15,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:44:15,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395212850] [2022-04-06 16:44:15,308 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:44:15,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286449512] [2022-04-06 16:44:15,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286449512] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:44:15,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:44:15,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-04-06 16:44:15,308 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:44:15,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2077314050] [2022-04-06 16:44:15,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2077314050] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:44:15,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:44:15,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 16:44:15,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635022979] [2022-04-06 16:44:15,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:44:15,309 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 16:44:15,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:44:15,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 16:44:15,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=718, Unknown=2, NotChecked=0, Total=870 [2022-04-06 16:44:15,309 INFO L87 Difference]: Start difference. First operand 1129 states and 1629 transitions. Second operand has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 16:44:28,476 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:44:29,551 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:44:31,656 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:44:34,873 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:44:37,374 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:44:39,379 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:44:40,983 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:44:42,986 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:44:44,678 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:44:48,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:44:48,793 INFO L93 Difference]: Finished difference Result 1246 states and 1791 transitions. [2022-04-06 16:44:48,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 16:44:48,794 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) Word has length 138 [2022-04-06 16:44:48,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:44:48,798 INFO L225 Difference]: With dead ends: 1246 [2022-04-06 16:44:48,798 INFO L226 Difference]: Without dead ends: 1243 [2022-04-06 16:44:48,799 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=203, Invalid=1055, Unknown=2, NotChecked=0, Total=1260 [2022-04-06 16:44:48,799 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 81 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 116 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.9s IncrementalHoareTripleChecker+Time [2022-04-06 16:44:48,799 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 489 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1634 Invalid, 6 Unknown, 0 Unchecked, 23.9s Time] [2022-04-06 16:44:48,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2022-04-06 16:44:49,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1149. [2022-04-06 16:44:49,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 638 states have (on average 1.2115987460815048) internal successors, (773), 657 states have internal predecessors, (773), 440 states have call successors, (440), 71 states have call predecessors, (440), 70 states have return successors, (438), 420 states have call predecessors, (438), 438 states have call successors, (438) [2022-04-06 16:44:49,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1651 transitions. [2022-04-06 16:44:49,174 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1651 transitions. Word has length 138 [2022-04-06 16:44:49,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:44:49,175 INFO L478 AbstractCegarLoop]: Abstraction has 1149 states and 1651 transitions. [2022-04-06 16:44:49,175 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 16:44:49,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1651 transitions. [2022-04-06 16:44:49,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-04-06 16:44:49,177 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:44:49,178 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:44:49,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 16:44:49,400 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:44:49,401 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:44:49,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:44:49,401 INFO L85 PathProgramCache]: Analyzing trace with hash -20730755, now seen corresponding path program 29 times [2022-04-06 16:44:49,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:44:49,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2041028733] [2022-04-06 16:44:49,401 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:44:49,402 INFO L85 PathProgramCache]: Analyzing trace with hash -20730755, now seen corresponding path program 30 times [2022-04-06 16:44:49,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:44:49,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750034242] [2022-04-06 16:44:49,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:44:49,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:44:49,407 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:44:49,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395496912] [2022-04-06 16:44:49,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:44:49,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:44:49,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:44:49,409 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:44:49,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 16:44:49,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 16:44:49,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:44:49,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 88 conjunts are in the unsatisfiable core [2022-04-06 16:44:49,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:44:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 46 proven. 97 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-04-06 16:44:50,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:44:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 46 proven. 97 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-04-06 16:44:57,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:44:57,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750034242] [2022-04-06 16:44:57,661 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:44:57,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395496912] [2022-04-06 16:44:57,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395496912] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:44:57,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:44:57,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2022-04-06 16:44:57,661 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:44:57,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2041028733] [2022-04-06 16:44:57,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2041028733] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:44:57,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:44:57,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 16:44:57,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989184132] [2022-04-06 16:44:57,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:44:57,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 16:44:57,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:44:57,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 16:44:57,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1118, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 16:44:57,662 INFO L87 Difference]: Start difference. First operand 1149 states and 1651 transitions. Second operand has 21 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 6 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-04-06 16:44:59,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:44:59,808 INFO L93 Difference]: Finished difference Result 1266 states and 1809 transitions. [2022-04-06 16:44:59,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 16:44:59,809 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 6 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 141 [2022-04-06 16:44:59,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:44:59,815 INFO L225 Difference]: With dead ends: 1266 [2022-04-06 16:44:59,815 INFO L226 Difference]: Without dead ends: 1263 [2022-04-06 16:44:59,816 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 243 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=427, Invalid=2123, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 16:44:59,816 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 80 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 16:44:59,817 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 500 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1427 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 16:44:59,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2022-04-06 16:45:00,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1160. [2022-04-06 16:45:00,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 645 states have (on average 1.2093023255813953) internal successors, (780), 663 states have internal predecessors, (780), 442 states have call successors, (442), 73 states have call predecessors, (442), 72 states have return successors, (440), 423 states have call predecessors, (440), 440 states have call successors, (440) [2022-04-06 16:45:00,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1662 transitions. [2022-04-06 16:45:00,280 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1662 transitions. Word has length 141 [2022-04-06 16:45:00,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:45:00,280 INFO L478 AbstractCegarLoop]: Abstraction has 1160 states and 1662 transitions. [2022-04-06 16:45:00,280 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 6 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-04-06 16:45:00,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1662 transitions. [2022-04-06 16:45:00,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-06 16:45:00,282 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:45:00,282 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:45:00,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-04-06 16:45:00,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-04-06 16:45:00,483 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:45:00,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:45:00,483 INFO L85 PathProgramCache]: Analyzing trace with hash -479386172, now seen corresponding path program 5 times [2022-04-06 16:45:00,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:45:00,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [373505410] [2022-04-06 16:45:00,484 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:45:00,484 INFO L85 PathProgramCache]: Analyzing trace with hash -479386172, now seen corresponding path program 6 times [2022-04-06 16:45:00,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:45:00,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432913891] [2022-04-06 16:45:00,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:45:00,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:45:00,490 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:45:00,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116033949] [2022-04-06 16:45:00,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:45:00,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:45:00,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:45:00,492 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:45:00,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 16:45:00,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 16:45:00,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:45:00,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 16:45:00,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:45:01,253 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:45:01,254 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:45:37,506 WARN L232 SmtUtils]: Spent 19.84s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 16:45:45,724 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:45:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 140 proven. 31 refuted. 2 times theorem prover too weak. 496 trivial. 0 not checked. [2022-04-06 16:45:50,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:46:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 122 proven. 34 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2022-04-06 16:46:01,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:46:01,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432913891] [2022-04-06 16:46:01,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:46:01,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116033949] [2022-04-06 16:46:01,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116033949] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:46:01,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:46:01,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2022-04-06 16:46:01,840 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:46:01,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [373505410] [2022-04-06 16:46:01,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [373505410] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:46:01,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:46:01,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 16:46:01,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719675564] [2022-04-06 16:46:01,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:46:01,841 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 16:46:01,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:46:01,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 16:46:01,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=425, Unknown=4, NotChecked=0, Total=506 [2022-04-06 16:46:01,841 INFO L87 Difference]: Start difference. First operand 1160 states and 1662 transitions. Second operand has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 16:46:04,708 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:46:06,220 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:46:08,225 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:46:15,065 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:46:16,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:46:16,743 INFO L93 Difference]: Finished difference Result 1363 states and 1951 transitions. [2022-04-06 16:46:16,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 16:46:16,744 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 143 [2022-04-06 16:46:16,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:46:16,749 INFO L225 Difference]: With dead ends: 1363 [2022-04-06 16:46:16,749 INFO L226 Difference]: Without dead ends: 1361 [2022-04-06 16:46:16,749 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 260 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 47.1s TimeCoverageRelationStatistics Valid=147, Invalid=779, Unknown=4, NotChecked=0, Total=930 [2022-04-06 16:46:16,750 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 77 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 73 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:46:16,750 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 306 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 793 Invalid, 3 Unknown, 0 Unchecked, 9.3s Time] [2022-04-06 16:46:16,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2022-04-06 16:46:17,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1298. [2022-04-06 16:46:17,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 714 states have (on average 1.218487394957983) internal successors, (870), 733 states have internal predecessors, (870), 505 states have call successors, (505), 79 states have call predecessors, (505), 78 states have return successors, (503), 485 states have call predecessors, (503), 503 states have call successors, (503) [2022-04-06 16:46:17,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 1878 transitions. [2022-04-06 16:46:17,256 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 1878 transitions. Word has length 143 [2022-04-06 16:46:17,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:46:17,256 INFO L478 AbstractCegarLoop]: Abstraction has 1298 states and 1878 transitions. [2022-04-06 16:46:17,257 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 16:46:17,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 1878 transitions. [2022-04-06 16:46:17,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-06 16:46:17,259 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:46:17,259 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2022-04-06 16:46:17,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 16:46:17,484 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 16:46:17,484 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:46:17,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:46:17,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1824189762, now seen corresponding path program 31 times [2022-04-06 16:46:17,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:46:17,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1197333095] [2022-04-06 16:46:17,485 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:46:17,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1824189762, now seen corresponding path program 32 times [2022-04-06 16:46:17,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:46:17,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310902414] [2022-04-06 16:46:17,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:46:17,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:46:17,492 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:46:17,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039754173] [2022-04-06 16:46:17,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:46:17,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:46:17,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:46:17,494 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:46:17,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 16:46:17,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:46:17,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:46:17,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 99 conjunts are in the unsatisfiable core [2022-04-06 16:46:17,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:46:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 102 proven. 86 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 16:46:18,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:46:19,391 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:46:21,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:46:21,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310902414] [2022-04-06 16:46:21,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:46:21,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039754173] [2022-04-06 16:46:21,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039754173] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:46:21,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:46:21,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-04-06 16:46:21,959 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:46:21,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1197333095] [2022-04-06 16:46:21,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1197333095] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:46:21,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:46:21,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 16:46:21,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989812373] [2022-04-06 16:46:21,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:46:21,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 16:46:21,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:46:21,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 16:46:21,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-04-06 16:46:21,960 INFO L87 Difference]: Start difference. First operand 1298 states and 1878 transitions. Second operand has 22 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 16:46:24,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:46:24,358 INFO L93 Difference]: Finished difference Result 1454 states and 2095 transitions. [2022-04-06 16:46:24,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 16:46:24,359 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) Word has length 143 [2022-04-06 16:46:24,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:46:24,365 INFO L225 Difference]: With dead ends: 1454 [2022-04-06 16:46:24,365 INFO L226 Difference]: Without dead ends: 1451 [2022-04-06 16:46:24,366 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 16:46:24,366 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 89 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 2158 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 2242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:46:24,366 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 634 Invalid, 2242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2158 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 16:46:24,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2022-04-06 16:46:24,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1395. [2022-04-06 16:46:24,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 764 states have (on average 1.2212041884816753) internal successors, (933), 784 states have internal predecessors, (933), 547 states have call successors, (547), 84 states have call predecessors, (547), 83 states have return successors, (545), 526 states have call predecessors, (545), 545 states have call successors, (545) [2022-04-06 16:46:24,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 2025 transitions. [2022-04-06 16:46:24,908 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 2025 transitions. Word has length 143 [2022-04-06 16:46:24,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:46:24,909 INFO L478 AbstractCegarLoop]: Abstraction has 1395 states and 2025 transitions. [2022-04-06 16:46:24,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 16:46:24,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 2025 transitions. [2022-04-06 16:46:24,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-06 16:46:24,911 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:46:24,911 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2022-04-06 16:46:24,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 16:46:25,132 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 16:46:25,132 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:46:25,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:46:25,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1701564030, now seen corresponding path program 33 times [2022-04-06 16:46:25,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:46:25,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1989779729] [2022-04-06 16:46:25,133 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:46:25,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1701564030, now seen corresponding path program 34 times [2022-04-06 16:46:25,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:46:25,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115286884] [2022-04-06 16:46:25,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:46:25,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:46:25,140 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:46:25,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [727969659] [2022-04-06 16:46:25,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:46:25,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:46:25,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:46:25,141 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:46:25,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 16:46:25,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:46:25,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:46:25,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 118 conjunts are in the unsatisfiable core [2022-04-06 16:46:25,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:46:26,189 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:46:26,195 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:46:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 171 proven. 98 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-04-06 16:46:34,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:46:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 185 proven. 17 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2022-04-06 16:46:38,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:46:38,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115286884] [2022-04-06 16:46:38,316 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:46:38,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727969659] [2022-04-06 16:46:38,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727969659] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:46:38,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:46:38,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 16] total 37 [2022-04-06 16:46:38,316 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:46:38,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1989779729] [2022-04-06 16:46:38,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1989779729] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:46:38,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:46:38,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 16:46:38,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440960717] [2022-04-06 16:46:38,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:46:38,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 16:46:38,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:46:38,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 16:46:38,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1159, Unknown=1, NotChecked=0, Total=1332 [2022-04-06 16:46:38,318 INFO L87 Difference]: Start difference. First operand 1395 states and 2025 transitions. Second operand has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 16:46:40,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:46:40,018 INFO L93 Difference]: Finished difference Result 1437 states and 2074 transitions. [2022-04-06 16:46:40,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 16:46:40,019 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 143 [2022-04-06 16:46:40,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:46:40,026 INFO L225 Difference]: With dead ends: 1437 [2022-04-06 16:46:40,026 INFO L226 Difference]: Without dead ends: 1430 [2022-04-06 16:46:40,026 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 247 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=258, Invalid=1811, Unknown=1, NotChecked=0, Total=2070 [2022-04-06 16:46:40,027 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 63 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 607 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 16:46:40,027 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 636 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 646 Invalid, 0 Unknown, 607 Unchecked, 0.6s Time] [2022-04-06 16:46:40,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2022-04-06 16:46:40,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1398. [2022-04-06 16:46:40,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 767 states have (on average 1.2216427640156453) internal successors, (937), 787 states have internal predecessors, (937), 547 states have call successors, (547), 84 states have call predecessors, (547), 83 states have return successors, (545), 526 states have call predecessors, (545), 545 states have call successors, (545) [2022-04-06 16:46:40,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 2029 transitions. [2022-04-06 16:46:40,724 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 2029 transitions. Word has length 143 [2022-04-06 16:46:40,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:46:40,725 INFO L478 AbstractCegarLoop]: Abstraction has 1398 states and 2029 transitions. [2022-04-06 16:46:40,725 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 16:46:40,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 2029 transitions. [2022-04-06 16:46:40,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-04-06 16:46:40,727 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:46:40,727 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:46:40,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 16:46:40,932 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:46:40,932 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:46:40,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:46:40,933 INFO L85 PathProgramCache]: Analyzing trace with hash 738044623, now seen corresponding path program 7 times [2022-04-06 16:46:40,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:46:40,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1968176835] [2022-04-06 16:46:40,933 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:46:40,934 INFO L85 PathProgramCache]: Analyzing trace with hash 738044623, now seen corresponding path program 8 times [2022-04-06 16:46:40,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:46:40,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733780819] [2022-04-06 16:46:40,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:46:40,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:46:40,941 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:46:40,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919952200] [2022-04-06 16:46:40,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:46:40,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:46:40,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:46:40,942 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:46:40,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 16:46:41,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:46:41,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:46:41,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 16:46:41,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:46:41,576 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 116 proven. 65 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2022-04-06 16:46:41,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:46:42,372 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 57 proven. 62 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2022-04-06 16:46:42,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:46:42,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733780819] [2022-04-06 16:46:42,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:46:42,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919952200] [2022-04-06 16:46:42,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919952200] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:46:42,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:46:42,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2022-04-06 16:46:42,372 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:46:42,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1968176835] [2022-04-06 16:46:42,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1968176835] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:46:42,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:46:42,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 16:46:42,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709581308] [2022-04-06 16:46:42,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:46:42,373 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 16:46:42,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:46:42,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 16:46:42,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-04-06 16:46:42,374 INFO L87 Difference]: Start difference. First operand 1398 states and 2029 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-04-06 16:46:44,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:46:44,195 INFO L93 Difference]: Finished difference Result 1599 states and 2311 transitions. [2022-04-06 16:46:44,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 16:46:44,197 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 146 [2022-04-06 16:46:44,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:46:44,203 INFO L225 Difference]: With dead ends: 1599 [2022-04-06 16:46:44,203 INFO L226 Difference]: Without dead ends: 1498 [2022-04-06 16:46:44,204 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 264 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=345, Invalid=1911, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 16:46:44,205 INFO L913 BasicCegarLoop]: 100 mSDtfsCounter, 88 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 16:46:44,205 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 599 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 666 Invalid, 0 Unknown, 197 Unchecked, 0.7s Time] [2022-04-06 16:46:44,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2022-04-06 16:46:44,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1427. [2022-04-06 16:46:44,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 788 states have (on average 1.2195431472081217) internal successors, (961), 808 states have internal predecessors, (961), 555 states have call successors, (555), 84 states have call predecessors, (555), 83 states have return successors, (553), 534 states have call predecessors, (553), 553 states have call successors, (553) [2022-04-06 16:46:44,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 2069 transitions. [2022-04-06 16:46:44,880 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 2069 transitions. Word has length 146 [2022-04-06 16:46:44,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:46:44,881 INFO L478 AbstractCegarLoop]: Abstraction has 1427 states and 2069 transitions. [2022-04-06 16:46:44,881 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-04-06 16:46:44,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 2069 transitions. [2022-04-06 16:46:44,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-04-06 16:46:44,883 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:46:44,883 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:46:44,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 16:46:45,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-04-06 16:46:45,107 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:46:45,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:46:45,107 INFO L85 PathProgramCache]: Analyzing trace with hash -780316161, now seen corresponding path program 35 times [2022-04-06 16:46:45,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:46:45,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [302243812] [2022-04-06 16:46:45,108 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:46:45,108 INFO L85 PathProgramCache]: Analyzing trace with hash -780316161, now seen corresponding path program 36 times [2022-04-06 16:46:45,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:46:45,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132408487] [2022-04-06 16:46:45,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:46:45,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:46:45,115 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:46:45,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327949225] [2022-04-06 16:46:45,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:46:45,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:46:45,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:46:45,119 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:46:45,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 16:46:46,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 16:46:46,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:46:46,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 16:46:46,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:46:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 53 proven. 147 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 16:46:54,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:47:05,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:47:05,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132408487] [2022-04-06 16:47:05,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:47:05,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327949225] [2022-04-06 16:47:05,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327949225] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:47:05,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:47:05,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-04-06 16:47:05,372 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:47:05,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [302243812] [2022-04-06 16:47:05,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [302243812] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:47:05,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:47:05,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 16:47:05,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148174364] [2022-04-06 16:47:05,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:47:05,373 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 16:47:05,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:47:05,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 16:47:05,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=945, Unknown=1, NotChecked=0, Total=1056 [2022-04-06 16:47:05,374 INFO L87 Difference]: Start difference. First operand 1427 states and 2069 transitions. Second operand has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 16:47:36,092 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:47:50,251 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:48:02,760 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:48:11,629 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:48:14,541 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:48:19,427 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:48:29,037 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:48:42,957 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:48:55,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:48:55,320 INFO L93 Difference]: Finished difference Result 1740 states and 2510 transitions. [2022-04-06 16:48:55,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 16:48:55,320 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 146 [2022-04-06 16:48:55,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:48:55,328 INFO L225 Difference]: With dead ends: 1740 [2022-04-06 16:48:55,328 INFO L226 Difference]: Without dead ends: 1736 [2022-04-06 16:48:55,330 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 79.1s TimeCoverageRelationStatistics Valid=1083, Invalid=5557, Unknown=2, NotChecked=0, Total=6642 [2022-04-06 16:48:55,330 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 154 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 3123 mSolverCounterSat, 498 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 3628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 3123 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:48:55,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 798 Invalid, 3628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 3123 Invalid, 7 Unknown, 0 Unchecked, 46.2s Time] [2022-04-06 16:48:55,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2022-04-06 16:48:56,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1601. [2022-04-06 16:48:56,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 889 states have (on average 1.21822272215973) internal successors, (1083), 912 states have internal predecessors, (1083), 622 states have call successors, (622), 90 states have call predecessors, (622), 89 states have return successors, (620), 598 states have call predecessors, (620), 620 states have call successors, (620) [2022-04-06 16:48:56,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 2325 transitions. [2022-04-06 16:48:56,085 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 2325 transitions. Word has length 146 [2022-04-06 16:48:56,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:48:56,085 INFO L478 AbstractCegarLoop]: Abstraction has 1601 states and 2325 transitions. [2022-04-06 16:48:56,086 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 16:48:56,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 2325 transitions. [2022-04-06 16:48:56,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-04-06 16:48:56,088 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:48:56,088 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:48:56,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 16:48:56,290 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 16:48:56,290 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:48:56,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:48:56,291 INFO L85 PathProgramCache]: Analyzing trace with hash 829249481, now seen corresponding path program 37 times [2022-04-06 16:48:56,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:48:56,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1842268028] [2022-04-06 16:48:56,291 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:48:56,291 INFO L85 PathProgramCache]: Analyzing trace with hash 829249481, now seen corresponding path program 38 times [2022-04-06 16:48:56,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:48:56,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617561839] [2022-04-06 16:48:56,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:48:56,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:48:56,298 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:48:56,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845738331] [2022-04-06 16:48:56,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:48:56,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:48:56,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:48:56,301 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:48:56,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 16:48:56,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:48:56,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:48:56,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 115 conjunts are in the unsatisfiable core [2022-04-06 16:48:56,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:48:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 136 proven. 124 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-04-06 16:48:57,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:48:58,577 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:49:00,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:49:00,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617561839] [2022-04-06 16:49:00,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:49:00,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845738331] [2022-04-06 16:49:00,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845738331] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:49:00,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:49:00,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-04-06 16:49:00,254 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:49:00,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1842268028] [2022-04-06 16:49:00,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1842268028] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:49:00,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:49:00,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 16:49:00,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311634835] [2022-04-06 16:49:00,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:49:00,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 16:49:00,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:49:00,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 16:49:00,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2022-04-06 16:49:00,255 INFO L87 Difference]: Start difference. First operand 1601 states and 2325 transitions. Second operand has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 16:49:05,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:49:05,570 INFO L93 Difference]: Finished difference Result 1795 states and 2597 transitions. [2022-04-06 16:49:05,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 16:49:05,572 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 146 [2022-04-06 16:49:05,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:49:05,578 INFO L225 Difference]: With dead ends: 1795 [2022-04-06 16:49:05,578 INFO L226 Difference]: Without dead ends: 1792 [2022-04-06 16:49:05,579 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 16:49:05,579 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 99 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 2427 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 2536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-06 16:49:05,579 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 725 Invalid, 2536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2427 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-06 16:49:05,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2022-04-06 16:49:06,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1734. [2022-04-06 16:49:06,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 962 states have (on average 1.2193347193347193) internal successors, (1173), 988 states have internal predecessors, (1173), 676 states have call successors, (676), 96 states have call predecessors, (676), 95 states have return successors, (674), 649 states have call predecessors, (674), 674 states have call successors, (674) [2022-04-06 16:49:06,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 2523 transitions. [2022-04-06 16:49:06,491 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 2523 transitions. Word has length 146 [2022-04-06 16:49:06,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:49:06,491 INFO L478 AbstractCegarLoop]: Abstraction has 1734 states and 2523 transitions. [2022-04-06 16:49:06,491 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 16:49:06,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 2523 transitions. [2022-04-06 16:49:06,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-06 16:49:06,493 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:49:06,493 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:49:06,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 16:49:06,694 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 16:49:06,695 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:49:06,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:49:06,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1012536368, now seen corresponding path program 9 times [2022-04-06 16:49:06,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:49:06,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [43500753] [2022-04-06 16:49:06,696 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:49:06,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1012536368, now seen corresponding path program 10 times [2022-04-06 16:49:06,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:49:06,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289505116] [2022-04-06 16:49:06,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:49:06,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:49:06,703 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:49:06,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621871542] [2022-04-06 16:49:06,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:49:06,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:49:06,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:49:06,706 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:49:06,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 16:49:06,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:49:06,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:49:06,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 16:49:06,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:49:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 44 proven. 81 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2022-04-06 16:49:07,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:49:08,473 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 83 proven. 14 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2022-04-06 16:49:08,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:49:08,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289505116] [2022-04-06 16:49:08,474 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:49:08,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621871542] [2022-04-06 16:49:08,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621871542] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:49:08,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:49:08,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 26 [2022-04-06 16:49:08,474 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:49:08,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [43500753] [2022-04-06 16:49:08,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [43500753] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:49:08,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:49:08,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 16:49:08,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885404389] [2022-04-06 16:49:08,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:49:08,475 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 16:49:08,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:49:08,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 16:49:08,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-04-06 16:49:08,475 INFO L87 Difference]: Start difference. First operand 1734 states and 2523 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 18 states have internal predecessors, (46), 7 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-04-06 16:49:11,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:49:11,764 INFO L93 Difference]: Finished difference Result 2310 states and 3379 transitions. [2022-04-06 16:49:11,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 16:49:11,765 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 18 states have internal predecessors, (46), 7 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 151 [2022-04-06 16:49:11,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:49:11,772 INFO L225 Difference]: With dead ends: 2310 [2022-04-06 16:49:11,772 INFO L226 Difference]: Without dead ends: 2308 [2022-04-06 16:49:11,773 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 276 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=483, Invalid=1967, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 16:49:11,774 INFO L913 BasicCegarLoop]: 106 mSDtfsCounter, 105 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:49:11,774 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 660 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 16:49:11,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2022-04-06 16:49:12,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 2021. [2022-04-06 16:49:12,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2021 states, 1141 states have (on average 1.217353198948291) internal successors, (1389), 1174 states have internal predecessors, (1389), 776 states have call successors, (776), 104 states have call predecessors, (776), 103 states have return successors, (774), 742 states have call predecessors, (774), 774 states have call successors, (774) [2022-04-06 16:49:12,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2021 states to 2021 states and 2939 transitions. [2022-04-06 16:49:12,933 INFO L78 Accepts]: Start accepts. Automaton has 2021 states and 2939 transitions. Word has length 151 [2022-04-06 16:49:12,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:49:12,934 INFO L478 AbstractCegarLoop]: Abstraction has 2021 states and 2939 transitions. [2022-04-06 16:49:12,934 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 18 states have internal predecessors, (46), 7 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-04-06 16:49:12,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2021 states and 2939 transitions. [2022-04-06 16:49:12,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-06 16:49:12,936 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:49:12,936 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:49:12,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-04-06 16:49:13,136 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-04-06 16:49:13,136 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:49:13,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:49:13,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1839651187, now seen corresponding path program 11 times [2022-04-06 16:49:13,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:49:13,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1261973366] [2022-04-06 16:49:13,137 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:49:13,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1839651187, now seen corresponding path program 12 times [2022-04-06 16:49:13,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:49:13,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896798224] [2022-04-06 16:49:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:49:13,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:49:13,145 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:49:13,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [622916621] [2022-04-06 16:49:13,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:49:13,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:49:13,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:49:13,146 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:49:13,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 16:49:13,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 16:49:13,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:49:13,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 16:49:13,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:49:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 124 proven. 87 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2022-04-06 16:49:18,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:49:20,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:49:20,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896798224] [2022-04-06 16:49:20,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:49:20,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622916621] [2022-04-06 16:49:20,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622916621] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:49:20,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:49:20,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-04-06 16:49:20,706 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:49:20,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1261973366] [2022-04-06 16:49:20,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1261973366] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:49:20,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:49:20,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 16:49:20,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870121470] [2022-04-06 16:49:20,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:49:20,706 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 16:49:20,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:49:20,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 16:49:20,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=346, Unknown=3, NotChecked=0, Total=420 [2022-04-06 16:49:20,707 INFO L87 Difference]: Start difference. First operand 2021 states and 2939 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-04-06 16:49:42,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:49:42,881 INFO L93 Difference]: Finished difference Result 2145 states and 3093 transitions. [2022-04-06 16:49:42,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 16:49:42,882 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 151 [2022-04-06 16:49:42,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:49:42,889 INFO L225 Difference]: With dead ends: 2145 [2022-04-06 16:49:42,889 INFO L226 Difference]: Without dead ends: 2143 [2022-04-06 16:49:42,890 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=226, Invalid=1093, Unknown=13, NotChecked=0, Total=1332 [2022-04-06 16:49:42,891 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 50 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:49:42,891 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 356 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 565 Invalid, 0 Unknown, 147 Unchecked, 1.1s Time] [2022-04-06 16:49:42,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2022-04-06 16:49:44,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 2096. [2022-04-06 16:49:44,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 1181 states have (on average 1.2116850127011007) internal successors, (1431), 1226 states have internal predecessors, (1431), 805 states have call successors, (805), 110 states have call predecessors, (805), 109 states have return successors, (803), 759 states have call predecessors, (803), 803 states have call successors, (803) [2022-04-06 16:49:44,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 3039 transitions. [2022-04-06 16:49:44,218 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 3039 transitions. Word has length 151 [2022-04-06 16:49:44,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:49:44,218 INFO L478 AbstractCegarLoop]: Abstraction has 2096 states and 3039 transitions. [2022-04-06 16:49:44,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-04-06 16:49:44,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 3039 transitions. [2022-04-06 16:49:44,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-06 16:49:44,220 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:49:44,220 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:49:44,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 16:49:44,421 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:49:44,422 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:49:44,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:49:44,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1748446329, now seen corresponding path program 39 times [2022-04-06 16:49:44,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:49:44,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1048626537] [2022-04-06 16:49:44,422 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:49:44,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1748446329, now seen corresponding path program 40 times [2022-04-06 16:49:44,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:49:44,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937110226] [2022-04-06 16:49:44,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:49:44,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:49:44,429 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:49:44,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988260017] [2022-04-06 16:49:44,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:49:44,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:49:44,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:49:44,431 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:49:44,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 16:49:44,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:49:44,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:49:44,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 97 conjunts are in the unsatisfiable core [2022-04-06 16:49:44,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:49:45,936 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 81 proven. 142 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 16:49:45,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:49:46,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:49:46,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937110226] [2022-04-06 16:49:46,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:49:46,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988260017] [2022-04-06 16:49:46,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988260017] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:49:46,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:49:46,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-04-06 16:49:46,615 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:49:46,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1048626537] [2022-04-06 16:49:46,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1048626537] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:49:46,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:49:46,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 16:49:46,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941711828] [2022-04-06 16:49:46,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:49:46,618 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 16:49:46,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:49:46,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 16:49:46,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2022-04-06 16:49:46,619 INFO L87 Difference]: Start difference. First operand 2096 states and 3039 transitions. Second operand has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 16:49:52,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:49:52,510 INFO L93 Difference]: Finished difference Result 2317 states and 3345 transitions. [2022-04-06 16:49:52,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 16:49:52,511 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 151 [2022-04-06 16:49:52,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:49:52,517 INFO L225 Difference]: With dead ends: 2317 [2022-04-06 16:49:52,517 INFO L226 Difference]: Without dead ends: 2310 [2022-04-06 16:49:52,518 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=175, Invalid=1895, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 16:49:52,519 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 116 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 2541 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 2664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 2541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:49:52,519 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 745 Invalid, 2664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 2541 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-04-06 16:49:52,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2022-04-06 16:49:53,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 2096. [2022-04-06 16:49:53,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 1181 states have (on average 1.2116850127011007) internal successors, (1431), 1226 states have internal predecessors, (1431), 805 states have call successors, (805), 110 states have call predecessors, (805), 109 states have return successors, (803), 759 states have call predecessors, (803), 803 states have call successors, (803) [2022-04-06 16:49:53,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 3039 transitions. [2022-04-06 16:49:53,668 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 3039 transitions. Word has length 151 [2022-04-06 16:49:53,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:49:53,668 INFO L478 AbstractCegarLoop]: Abstraction has 2096 states and 3039 transitions. [2022-04-06 16:49:53,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 16:49:53,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 3039 transitions. [2022-04-06 16:49:53,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-04-06 16:49:53,671 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:49:53,671 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:49:53,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-04-06 16:49:53,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:49:53,871 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:49:53,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:49:53,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1293461113, now seen corresponding path program 41 times [2022-04-06 16:49:53,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:49:53,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [78709014] [2022-04-06 16:49:53,872 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:49:53,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1293461113, now seen corresponding path program 42 times [2022-04-06 16:49:53,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:49:53,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214735271] [2022-04-06 16:49:53,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:49:53,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:49:53,879 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:49:53,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125717202] [2022-04-06 16:49:53,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:49:53,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:49:53,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:49:53,885 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:49:53,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 16:49:53,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 16:49:53,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:49:53,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 80 conjunts are in the unsatisfiable core [2022-04-06 16:49:53,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:49:56,479 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:49:56,481 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:49:56,483 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:49:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 80 proven. 146 refuted. 0 times theorem prover too weak. 667 trivial. 0 not checked. [2022-04-06 16:49:56,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:50:23,153 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:50:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 80 proven. 137 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-04-06 16:50:29,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:50:29,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214735271] [2022-04-06 16:50:29,623 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:50:29,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125717202] [2022-04-06 16:50:29,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125717202] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:50:29,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:50:29,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 37 [2022-04-06 16:50:29,623 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:50:29,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [78709014] [2022-04-06 16:50:29,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [78709014] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:50:29,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:50:29,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 16:50:29,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384673240] [2022-04-06 16:50:29,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:50:29,624 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 16:50:29,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:50:29,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 16:50:29,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1116, Unknown=2, NotChecked=0, Total=1332 [2022-04-06 16:50:29,624 INFO L87 Difference]: Start difference. First operand 2096 states and 3039 transitions. Second operand has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2022-04-06 16:50:37,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:50:37,616 INFO L93 Difference]: Finished difference Result 2214 states and 3203 transitions. [2022-04-06 16:50:37,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 16:50:37,617 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) Word has length 155 [2022-04-06 16:50:37,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:50:37,623 INFO L225 Difference]: With dead ends: 2214 [2022-04-06 16:50:37,623 INFO L226 Difference]: Without dead ends: 2211 [2022-04-06 16:50:37,624 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 273 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 31.9s TimeCoverageRelationStatistics Valid=320, Invalid=1658, Unknown=2, NotChecked=0, Total=1980 [2022-04-06 16:50:37,624 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 74 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 1758 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:50:37,624 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 430 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1758 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 16:50:37,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2022-04-06 16:50:38,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 2175. [2022-04-06 16:50:38,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 1225 states have (on average 1.2122448979591838) internal successors, (1485), 1273 states have internal predecessors, (1485), 836 states have call successors, (836), 114 states have call predecessors, (836), 113 states have return successors, (834), 787 states have call predecessors, (834), 834 states have call successors, (834) [2022-04-06 16:50:38,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 3155 transitions. [2022-04-06 16:50:38,841 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 3155 transitions. Word has length 155 [2022-04-06 16:50:38,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:50:38,841 INFO L478 AbstractCegarLoop]: Abstraction has 2175 states and 3155 transitions. [2022-04-06 16:50:38,841 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2022-04-06 16:50:38,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 3155 transitions. [2022-04-06 16:50:38,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-04-06 16:50:38,843 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:50:38,844 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:50:38,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-04-06 16:50:39,044 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-04-06 16:50:39,044 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:50:39,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:50:39,045 INFO L85 PathProgramCache]: Analyzing trace with hash -739148827, now seen corresponding path program 43 times [2022-04-06 16:50:39,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:50:39,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1325316857] [2022-04-06 16:50:39,045 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:50:39,045 INFO L85 PathProgramCache]: Analyzing trace with hash -739148827, now seen corresponding path program 44 times [2022-04-06 16:50:39,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:50:39,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740640363] [2022-04-06 16:50:39,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:50:39,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:50:39,052 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:50:39,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794107610] [2022-04-06 16:50:39,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:50:39,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:50:39,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:50:39,054 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:50:39,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 16:50:39,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:50:39,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:50:39,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 16:50:39,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:50:41,724 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:50:41,726 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:50:42,236 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 180 proven. 121 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2022-04-06 16:50:42,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:50:45,315 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:50:45,316 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:50:47,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:50:47,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740640363] [2022-04-06 16:50:47,633 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:50:47,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794107610] [2022-04-06 16:50:47,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794107610] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:50:47,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:50:47,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-04-06 16:50:47,633 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:50:47,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1325316857] [2022-04-06 16:50:47,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1325316857] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:50:47,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:50:47,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 16:50:47,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029288283] [2022-04-06 16:50:47,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:50:47,634 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 16:50:47,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:50:47,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 16:50:47,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-04-06 16:50:47,634 INFO L87 Difference]: Start difference. First operand 2175 states and 3155 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 7 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 6 states have call successors, (25) [2022-04-06 16:50:52,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:50:52,031 INFO L93 Difference]: Finished difference Result 2318 states and 3359 transitions. [2022-04-06 16:50:52,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 16:50:52,032 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 7 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 6 states have call successors, (25) Word has length 155 [2022-04-06 16:50:52,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:50:52,039 INFO L225 Difference]: With dead ends: 2318 [2022-04-06 16:50:52,040 INFO L226 Difference]: Without dead ends: 2315 [2022-04-06 16:50:52,040 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 223 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=307, Invalid=1499, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 16:50:52,041 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 61 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 16:50:52,041 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 405 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 16:50:52,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-04-06 16:50:53,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2281. [2022-04-06 16:50:53,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2281 states, 1282 states have (on average 1.2137285491419656) internal successors, (1556), 1332 states have internal predecessors, (1556), 880 states have call successors, (880), 119 states have call predecessors, (880), 118 states have return successors, (878), 829 states have call predecessors, (878), 878 states have call successors, (878) [2022-04-06 16:50:53,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 3314 transitions. [2022-04-06 16:50:53,401 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 3314 transitions. Word has length 155 [2022-04-06 16:50:53,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:50:53,401 INFO L478 AbstractCegarLoop]: Abstraction has 2281 states and 3314 transitions. [2022-04-06 16:50:53,401 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 7 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 6 states have call successors, (25) [2022-04-06 16:50:53,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 3314 transitions. [2022-04-06 16:50:53,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-04-06 16:50:53,404 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:50:53,404 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 7, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:50:53,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-06 16:50:53,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-04-06 16:50:53,619 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:50:53,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:50:53,620 INFO L85 PathProgramCache]: Analyzing trace with hash 414423310, now seen corresponding path program 13 times [2022-04-06 16:50:53,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:50:53,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1835606344] [2022-04-06 16:50:53,620 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:50:53,620 INFO L85 PathProgramCache]: Analyzing trace with hash 414423310, now seen corresponding path program 14 times [2022-04-06 16:50:53,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:50:53,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468690643] [2022-04-06 16:50:53,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:50:53,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:50:53,626 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:50:53,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219724433] [2022-04-06 16:50:53,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:50:53,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:50:53,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:50:53,629 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:50:53,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 16:50:53,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:50:53,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:50:53,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 112 conjunts are in the unsatisfiable core [2022-04-06 16:50:53,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:50:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 104 proven. 128 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2022-04-06 16:50:55,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:50:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 168 proven. 47 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-04-06 16:50:56,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:50:56,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468690643] [2022-04-06 16:50:56,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:50:56,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219724433] [2022-04-06 16:50:56,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219724433] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:50:56,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:50:56,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 32 [2022-04-06 16:50:56,564 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:50:56,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1835606344] [2022-04-06 16:50:56,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1835606344] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:50:56,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:50:56,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 16:50:56,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622207834] [2022-04-06 16:50:56,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:50:56,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 16:50:56,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:50:56,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 16:50:56,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-04-06 16:50:56,565 INFO L87 Difference]: Start difference. First operand 2281 states and 3314 transitions. Second operand has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-04-06 16:50:59,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:50:59,886 INFO L93 Difference]: Finished difference Result 2411 states and 3492 transitions. [2022-04-06 16:50:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 16:50:59,888 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 154 [2022-04-06 16:50:59,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:50:59,895 INFO L225 Difference]: With dead ends: 2411 [2022-04-06 16:50:59,895 INFO L226 Difference]: Without dead ends: 2409 [2022-04-06 16:50:59,896 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 274 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=193, Invalid=1367, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 16:50:59,896 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 87 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 16:50:59,896 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 540 Invalid, 1798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1682 Invalid, 0 Unknown, 40 Unchecked, 1.7s Time] [2022-04-06 16:50:59,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2409 states. [2022-04-06 16:51:01,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2409 to 2350. [2022-04-06 16:51:01,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2350 states, 1320 states have (on average 1.2143939393939394) internal successors, (1603), 1371 states have internal predecessors, (1603), 909 states have call successors, (909), 121 states have call predecessors, (909), 120 states have return successors, (907), 857 states have call predecessors, (907), 907 states have call successors, (907) [2022-04-06 16:51:01,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 3419 transitions. [2022-04-06 16:51:01,410 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 3419 transitions. Word has length 154 [2022-04-06 16:51:01,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:51:01,411 INFO L478 AbstractCegarLoop]: Abstraction has 2350 states and 3419 transitions. [2022-04-06 16:51:01,411 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-04-06 16:51:01,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 3419 transitions. [2022-04-06 16:51:01,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-06 16:51:01,413 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:51:01,413 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:51:01,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-04-06 16:51:01,614 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-04-06 16:51:01,614 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:51:01,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:51:01,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1012344874, now seen corresponding path program 45 times [2022-04-06 16:51:01,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:51:01,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [646433768] [2022-04-06 16:51:01,615 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:51:01,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1012344874, now seen corresponding path program 46 times [2022-04-06 16:51:01,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:51:01,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681330813] [2022-04-06 16:51:01,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:51:01,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:51:01,620 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:51:01,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [890984726] [2022-04-06 16:51:01,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:51:01,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:51:01,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:51:01,621 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:51:01,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 16:51:01,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:51:01,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:51:01,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 16:51:01,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:51:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 50 proven. 72 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2022-04-06 16:51:02,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:51:16,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:51:16,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681330813] [2022-04-06 16:51:16,437 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:51:16,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890984726] [2022-04-06 16:51:16,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890984726] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:51:16,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:51:16,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-04-06 16:51:16,438 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:51:16,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [646433768] [2022-04-06 16:51:16,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [646433768] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:51:16,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:51:16,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 16:51:16,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808900865] [2022-04-06 16:51:16,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:51:16,438 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 16:51:16,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:51:16,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 16:51:16,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=466, Unknown=3, NotChecked=0, Total=552 [2022-04-06 16:51:16,439 INFO L87 Difference]: Start difference. First operand 2350 states and 3419 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-04-06 16:51:19,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:51:19,210 INFO L93 Difference]: Finished difference Result 3830 states and 5774 transitions. [2022-04-06 16:51:19,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 16:51:19,211 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 157 [2022-04-06 16:51:19,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:51:19,222 INFO L225 Difference]: With dead ends: 3830 [2022-04-06 16:51:19,223 INFO L226 Difference]: Without dead ends: 3205 [2022-04-06 16:51:19,226 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=262, Invalid=995, Unknown=3, NotChecked=0, Total=1260 [2022-04-06 16:51:19,226 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 55 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 16:51:19,226 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 356 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 16:51:19,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3205 states. [2022-04-06 16:51:20,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3205 to 2722. [2022-04-06 16:51:20,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 1484 states have (on average 1.2243935309973046) internal successors, (1817), 1535 states have internal predecessors, (1817), 1117 states have call successors, (1117), 121 states have call predecessors, (1117), 120 states have return successors, (1115), 1065 states have call predecessors, (1115), 1115 states have call successors, (1115) [2022-04-06 16:51:20,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 4049 transitions. [2022-04-06 16:51:20,995 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 4049 transitions. Word has length 157 [2022-04-06 16:51:20,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:51:20,995 INFO L478 AbstractCegarLoop]: Abstraction has 2722 states and 4049 transitions. [2022-04-06 16:51:20,995 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-04-06 16:51:20,996 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 4049 transitions. [2022-04-06 16:51:20,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-04-06 16:51:20,998 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:51:20,998 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:51:21,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-04-06 16:51:21,198 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:51:21,199 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:51:21,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:51:21,199 INFO L85 PathProgramCache]: Analyzing trace with hash -624413815, now seen corresponding path program 47 times [2022-04-06 16:51:21,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:51:21,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [267662989] [2022-04-06 16:51:21,199 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:51:21,199 INFO L85 PathProgramCache]: Analyzing trace with hash -624413815, now seen corresponding path program 48 times [2022-04-06 16:51:21,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:51:21,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440304054] [2022-04-06 16:51:21,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:51:21,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:51:21,205 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:51:21,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [83037692] [2022-04-06 16:51:21,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:51:21,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:51:21,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:51:21,206 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:51:21,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 16:51:21,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 16:51:21,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:51:21,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 82 conjunts are in the unsatisfiable core [2022-04-06 16:51:21,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:51:23,588 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:51:34,292 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:52:02,669 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:52:08,953 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:52:30,565 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:53:00,986 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:53:07,530 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:53:28,817 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:53:57,363 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:54:03,724 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:54:18,845 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:54:18,848 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful