/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/egcd2-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 04:37:50,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 04:37:50,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 04:37:50,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 04:37:51,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 04:37:51,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 04:37:51,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 04:37:51,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 04:37:51,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 04:37:51,009 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 04:37:51,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 04:37:51,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 04:37:51,017 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 04:37:51,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 04:37:51,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 04:37:51,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 04:37:51,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 04:37:51,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 04:37:51,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 04:37:51,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 04:37:51,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 04:37:51,036 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 04:37:51,044 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 04:37:51,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 04:37:51,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 04:37:51,045 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 04:37:51,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 04:37:51,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 04:37:51,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 04:37:51,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 04:37:51,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 04:37:51,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 04:37:51,047 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 04:37:51,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 04:37:51,047 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 04:37:51,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 04:37:51,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 04:37:51,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 04:37:51,048 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 04:37:51,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 04:37:51,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 04:37:51,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 04:37:51,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 04:37:51,048 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 04:37:51,048 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 04:37:51,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 04:37:51,048 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 04:37:51,049 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 04:37:51,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 04:37:51,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 04:37:51,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 04:37:51,304 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 04:37:51,307 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 04:37:51,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c [2022-03-19 04:37:51,371 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0f7ef5ae/b8696b2b635d4543b9ff107eb4586acc/FLAGd278e8425 [2022-03-19 04:37:51,718 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 04:37:51,718 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c [2022-03-19 04:37:51,728 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0f7ef5ae/b8696b2b635d4543b9ff107eb4586acc/FLAGd278e8425 [2022-03-19 04:37:51,746 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0f7ef5ae/b8696b2b635d4543b9ff107eb4586acc [2022-03-19 04:37:51,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 04:37:51,750 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 04:37:51,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 04:37:51,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 04:37:51,757 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 04:37:51,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 04:37:51" (1/1) ... [2022-03-19 04:37:51,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2099cda9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:37:51, skipping insertion in model container [2022-03-19 04:37:51,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 04:37:51" (1/1) ... [2022-03-19 04:37:51,764 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 04:37:51,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 04:37:51,922 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/egcd2-ll_valuebound50.c[490,503] [2022-03-19 04:37:51,943 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 04:37:51,950 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 04:37:51,966 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/egcd2-ll_valuebound50.c[490,503] [2022-03-19 04:37:51,982 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 04:37:51,997 INFO L208 MainTranslator]: Completed translation [2022-03-19 04:37:51,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:37:51 WrapperNode [2022-03-19 04:37:51,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 04:37:51,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 04:37:51,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 04:37:51,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 04:37:52,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:37:51" (1/1) ... [2022-03-19 04:37:52,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:37:51" (1/1) ... [2022-03-19 04:37:52,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:37:51" (1/1) ... [2022-03-19 04:37:52,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:37:51" (1/1) ... [2022-03-19 04:37:52,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:37:51" (1/1) ... [2022-03-19 04:37:52,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:37:51" (1/1) ... [2022-03-19 04:37:52,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:37:51" (1/1) ... [2022-03-19 04:37:52,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 04:37:52,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 04:37:52,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 04:37:52,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 04:37:52,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:37:51" (1/1) ... [2022-03-19 04:37:52,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 04:37:52,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:37:52,075 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 04:37:52,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 04:37:52,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 04:37:52,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 04:37:52,127 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 04:37:52,127 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 04:37:52,127 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 04:37:52,127 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 04:37:52,127 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 04:37:52,127 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 04:37:52,127 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 04:37:52,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 04:37:52,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 04:37:52,129 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 04:37:52,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 04:37:52,129 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 04:37:52,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 04:37:52,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 04:37:52,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 04:37:52,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 04:37:52,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 04:37:52,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 04:37:52,193 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 04:37:52,194 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 04:37:52,357 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 04:37:52,377 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 04:37:52,377 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 04:37:52,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 04:37:52 BoogieIcfgContainer [2022-03-19 04:37:52,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 04:37:52,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 04:37:52,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 04:37:52,398 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 04:37:52,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 04:37:51" (1/3) ... [2022-03-19 04:37:52,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bfc30ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 04:37:52, skipping insertion in model container [2022-03-19 04:37:52,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:37:51" (2/3) ... [2022-03-19 04:37:52,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bfc30ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 04:37:52, skipping insertion in model container [2022-03-19 04:37:52,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 04:37:52" (3/3) ... [2022-03-19 04:37:52,401 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound50.c [2022-03-19 04:37:52,408 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 04:37:52,408 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 04:37:52,471 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 04:37:52,479 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 04:37:52,480 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 04:37:52,507 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 04:37:52,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 04:37:52,518 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:37:52,518 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:37:52,519 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:37:52,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:37:52,525 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 1 times [2022-03-19 04:37:52,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:52,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1200693904] [2022-03-19 04:37:52,542 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:37:52,543 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 2 times [2022-03-19 04:37:52,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:37:52,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724515578] [2022-03-19 04:37:52,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:37:52,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:37:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:37:52,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 04:37:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:37:52,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 04:37:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:37:52,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 04:37:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:37:52,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 04:37:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:37:52,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 04:37:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:37:52,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 04:37:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:37:52,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 04:37:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:37:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 04:37:52,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:37:52,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724515578] [2022-03-19 04:37:52,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724515578] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:37:52,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:37:52,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 04:37:52,837 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:37:52,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1200693904] [2022-03-19 04:37:52,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1200693904] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:37:52,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:37:52,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 04:37:52,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702886941] [2022-03-19 04:37:52,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:37:52,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 04:37:52,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:52,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 04:37:52,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 04:37:52,874 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 04:37:53,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:37:53,002 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2022-03-19 04:37:53,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 04:37:53,004 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-03-19 04:37:53,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:37:53,013 INFO L225 Difference]: With dead ends: 73 [2022-03-19 04:37:53,013 INFO L226 Difference]: Without dead ends: 35 [2022-03-19 04:37:53,017 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 04:37:53,019 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:37:53,020 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:37:53,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-19 04:37:53,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-19 04:37:53,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 04:37:53,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-03-19 04:37:53,062 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-03-19 04:37:53,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:37:53,062 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-03-19 04:37:53,063 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 04:37:53,063 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-03-19 04:37:53,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 04:37:53,066 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:37:53,066 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:37:53,066 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 04:37:53,067 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:37:53,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:37:53,068 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 1 times [2022-03-19 04:37:53,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:53,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [202179088] [2022-03-19 04:37:53,069 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:37:53,069 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 2 times [2022-03-19 04:37:53,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:37:53,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147492890] [2022-03-19 04:37:53,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:37:53,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:37:53,105 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:37:53,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745260771] [2022-03-19 04:37:53,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:37:53,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:53,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:37:53,110 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:37:53,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 04:37:53,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:37:53,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:37:53,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 04:37:53,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:37:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-19 04:37:53,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:37:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-19 04:37:53,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:37:53,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147492890] [2022-03-19 04:37:53,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:37:53,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745260771] [2022-03-19 04:37:53,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745260771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:37:53,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:37:53,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-19 04:37:53,489 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:37:53,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [202179088] [2022-03-19 04:37:53,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [202179088] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:37:53,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:37:53,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 04:37:53,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272870497] [2022-03-19 04:37:53,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:37:53,490 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 04:37:53,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:53,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 04:37:53,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-19 04:37:53,492 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 04:37:53,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:37:53,589 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-03-19 04:37:53,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 04:37:53,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-03-19 04:37:53,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:37:53,593 INFO L225 Difference]: With dead ends: 52 [2022-03-19 04:37:53,593 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 04:37:53,595 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-19 04:37:53,596 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:37:53,600 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 154 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:37:53,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 04:37:53,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-19 04:37:53,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 04:37:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-03-19 04:37:53,620 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-03-19 04:37:53,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:37:53,621 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-03-19 04:37:53,621 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 04:37:53,621 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-03-19 04:37:53,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 04:37:53,624 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:37:53,624 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:37:53,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 04:37:53,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:53,844 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:37:53,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:37:53,844 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 1 times [2022-03-19 04:37:53,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:53,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [992811143] [2022-03-19 04:37:53,845 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:37:53,845 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 2 times [2022-03-19 04:37:53,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:37:53,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764434751] [2022-03-19 04:37:53,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:37:53,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:37:53,862 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:37:53,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572480867] [2022-03-19 04:37:53,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:37:53,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:53,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:37:53,866 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:37:53,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 04:37:53,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 04:37:53,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:37:53,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 04:37:53,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:37:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 04:37:54,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:37:54,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:37:54,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764434751] [2022-03-19 04:37:54,030 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:37:54,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572480867] [2022-03-19 04:37:54,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572480867] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:37:54,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:37:54,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:37:54,031 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:37:54,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [992811143] [2022-03-19 04:37:54,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [992811143] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:37:54,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:37:54,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:37:54,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937088966] [2022-03-19 04:37:54,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:37:54,033 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:37:54,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:54,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:37:54,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:37:54,034 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 04:37:54,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:37:54,080 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-03-19 04:37:54,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:37:54,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-03-19 04:37:54,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:37:54,082 INFO L225 Difference]: With dead ends: 50 [2022-03-19 04:37:54,082 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 04:37:54,083 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 04:37:54,092 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:37:54,093 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 163 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:37:54,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 04:37:54,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2022-03-19 04:37:54,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 04:37:54,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2022-03-19 04:37:54,106 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2022-03-19 04:37:54,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:37:54,106 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2022-03-19 04:37:54,107 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 04:37:54,107 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2022-03-19 04:37:54,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 04:37:54,108 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:37:54,108 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2022-03-19 04:37:54,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-19 04:37:54,308 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 04:37:54,309 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:37:54,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:37:54,309 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 1 times [2022-03-19 04:37:54,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:54,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [800169371] [2022-03-19 04:37:54,310 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:37:54,310 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 2 times [2022-03-19 04:37:54,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:37:54,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80668106] [2022-03-19 04:37:54,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:37:54,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:37:54,325 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:37:54,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979123676] [2022-03-19 04:37:54,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:37:54,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:54,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:37:54,327 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:37:54,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 04:37:54,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:37:54,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:37:54,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 04:37:54,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:37:54,531 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 04:37:54,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:37:54,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:37:54,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80668106] [2022-03-19 04:37:54,531 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:37:54,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979123676] [2022-03-19 04:37:54,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979123676] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:37:54,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:37:54,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:37:54,532 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:37:54,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [800169371] [2022-03-19 04:37:54,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [800169371] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:37:54,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:37:54,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:37:54,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641205209] [2022-03-19 04:37:54,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:37:54,533 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:37:54,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:54,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:37:54,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:37:54,534 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 04:37:54,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:37:54,570 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2022-03-19 04:37:54,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:37:54,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-03-19 04:37:54,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:37:54,575 INFO L225 Difference]: With dead ends: 58 [2022-03-19 04:37:54,575 INFO L226 Difference]: Without dead ends: 56 [2022-03-19 04:37:54,576 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 04:37:54,579 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 7 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:37:54,580 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 173 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:37:54,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-19 04:37:54,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-03-19 04:37:54,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 32 states have internal predecessors, (33), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 04:37:54,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2022-03-19 04:37:54,602 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 50 [2022-03-19 04:37:54,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:37:54,603 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2022-03-19 04:37:54,603 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 04:37:54,603 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2022-03-19 04:37:54,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 04:37:54,607 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:37:54,607 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1] [2022-03-19 04:37:54,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 04:37:54,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:54,824 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:37:54,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:37:54,824 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 1 times [2022-03-19 04:37:54,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:54,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [14012007] [2022-03-19 04:37:54,825 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:37:54,825 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 2 times [2022-03-19 04:37:54,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:37:54,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331678884] [2022-03-19 04:37:54,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:37:54,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:37:54,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:37:54,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528981108] [2022-03-19 04:37:54,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:37:54,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:54,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:37:54,837 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:37:54,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 04:37:54,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:37:54,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:37:54,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 04:37:54,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:37:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-19 04:37:55,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:37:55,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:37:55,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331678884] [2022-03-19 04:37:55,061 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:37:55,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528981108] [2022-03-19 04:37:55,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528981108] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:37:55,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:37:55,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:37:55,062 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:37:55,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [14012007] [2022-03-19 04:37:55,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [14012007] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:37:55,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:37:55,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:37:55,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194582696] [2022-03-19 04:37:55,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:37:55,063 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:37:55,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:55,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:37:55,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:37:55,063 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (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) [2022-03-19 04:37:55,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:37:55,106 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2022-03-19 04:37:55,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:37:55,107 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (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 55 [2022-03-19 04:37:55,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:37:55,108 INFO L225 Difference]: With dead ends: 62 [2022-03-19 04:37:55,108 INFO L226 Difference]: Without dead ends: 60 [2022-03-19 04:37:55,108 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 04:37:55,108 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:37:55,109 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 163 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:37:55,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-19 04:37:55,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-19 04:37:55,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 04:37:55,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2022-03-19 04:37:55,122 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 55 [2022-03-19 04:37:55,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:37:55,122 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2022-03-19 04:37:55,123 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (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) [2022-03-19 04:37:55,123 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2022-03-19 04:37:55,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-19 04:37:55,127 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:37:55,127 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1] [2022-03-19 04:37:55,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-19 04:37:55,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:55,331 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:37:55,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:37:55,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 1 times [2022-03-19 04:37:55,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:55,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [620521767] [2022-03-19 04:37:55,332 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:37:55,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 2 times [2022-03-19 04:37:55,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:37:55,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282250604] [2022-03-19 04:37:55,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:37:55,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:37:55,343 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:37:55,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [50088224] [2022-03-19 04:37:55,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:37:55,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:55,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:37:55,345 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:37:55,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 04:37:55,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:37:55,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:37:55,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 04:37:55,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:37:55,647 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-19 04:37:55,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:37:55,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:37:55,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282250604] [2022-03-19 04:37:55,784 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:37:55,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50088224] [2022-03-19 04:37:55,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50088224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:37:55,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:37:55,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-19 04:37:55,785 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:37:55,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [620521767] [2022-03-19 04:37:55,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [620521767] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:37:55,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:37:55,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 04:37:55,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336021250] [2022-03-19 04:37:55,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:37:55,785 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 04:37:55,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:55,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 04:37:55,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-19 04:37:55,786 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-19 04:37:55,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:37:55,901 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2022-03-19 04:37:55,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 04:37:55,901 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-03-19 04:37:55,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:37:55,902 INFO L225 Difference]: With dead ends: 66 [2022-03-19 04:37:55,903 INFO L226 Difference]: Without dead ends: 64 [2022-03-19 04:37:55,903 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-19 04:37:55,904 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:37:55,904 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 181 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:37:55,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-19 04:37:55,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-19 04:37:55,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 04:37:55,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2022-03-19 04:37:55,924 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 60 [2022-03-19 04:37:55,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:37:55,925 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2022-03-19 04:37:55,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-19 04:37:55,925 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2022-03-19 04:37:55,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 04:37:55,926 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:37:55,926 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 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] [2022-03-19 04:37:55,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 04:37:56,139 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:56,140 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:37:56,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:37:56,140 INFO L85 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 1 times [2022-03-19 04:37:56,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:56,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1174082144] [2022-03-19 04:37:56,141 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:37:56,141 INFO L85 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 2 times [2022-03-19 04:37:56,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:37:56,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556150503] [2022-03-19 04:37:56,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:37:56,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:37:56,152 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:37:56,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420646232] [2022-03-19 04:37:56,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:37:56,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:56,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:37:56,154 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:37:56,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 04:37:56,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:37:56,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:37:56,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 04:37:56,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:37:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 04:37:56,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:37:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-03-19 04:37:56,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:37:56,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556150503] [2022-03-19 04:37:56,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:37:56,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420646232] [2022-03-19 04:37:56,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420646232] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 04:37:56,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:37:56,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-19 04:37:56,514 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:37:56,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1174082144] [2022-03-19 04:37:56,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1174082144] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:37:56,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:37:56,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:37:56,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815072603] [2022-03-19 04:37:56,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:37:56,515 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:37:56,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:56,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:37:56,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-19 04:37:56,515 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-19 04:37:56,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:37:56,556 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-03-19 04:37:56,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:37:56,557 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2022-03-19 04:37:56,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:37:56,558 INFO L225 Difference]: With dead ends: 69 [2022-03-19 04:37:56,558 INFO L226 Difference]: Without dead ends: 67 [2022-03-19 04:37:56,558 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 04:37:56,559 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:37:56,559 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 146 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:37:56,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-19 04:37:56,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2022-03-19 04:37:56,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 04:37:56,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-03-19 04:37:56,568 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 67 [2022-03-19 04:37:56,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:37:56,568 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-03-19 04:37:56,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-19 04:37:56,568 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-03-19 04:37:56,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 04:37:56,569 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:37:56,569 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:37:56,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 04:37:56,782 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:56,782 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:37:56,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:37:56,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 1 times [2022-03-19 04:37:56,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:56,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1956950591] [2022-03-19 04:37:56,783 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:37:56,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 2 times [2022-03-19 04:37:56,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:37:56,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983439824] [2022-03-19 04:37:56,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:37:56,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:37:56,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:37:56,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043857550] [2022-03-19 04:37:56,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:37:56,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:56,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:37:56,805 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:37:56,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 04:37:56,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:37:56,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:37:56,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 04:37:56,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:37:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-19 04:37:56,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:37:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-19 04:37:57,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:37:57,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983439824] [2022-03-19 04:37:57,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:37:57,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043857550] [2022-03-19 04:37:57,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043857550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:37:57,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:37:57,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-19 04:37:57,109 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:37:57,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1956950591] [2022-03-19 04:37:57,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1956950591] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:37:57,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:37:57,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 04:37:57,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391275420] [2022-03-19 04:37:57,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:37:57,110 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 04:37:57,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:57,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 04:37:57,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-19 04:37:57,111 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 04:37:57,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:37:57,261 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2022-03-19 04:37:57,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 04:37:57,261 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-03-19 04:37:57,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:37:57,263 INFO L225 Difference]: With dead ends: 106 [2022-03-19 04:37:57,263 INFO L226 Difference]: Without dead ends: 98 [2022-03-19 04:37:57,263 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-19 04:37:57,264 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 30 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:37:57,264 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 333 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:37:57,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-19 04:37:57,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-03-19 04:37:57,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-19 04:37:57,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-03-19 04:37:57,281 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-03-19 04:37:57,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:37:57,281 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-03-19 04:37:57,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 04:37:57,281 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-03-19 04:37:57,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 04:37:57,282 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:37:57,282 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 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, 1, 1] [2022-03-19 04:37:57,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 04:37:57,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:57,496 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:37:57,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:37:57,496 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 1 times [2022-03-19 04:37:57,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:57,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [829276786] [2022-03-19 04:37:57,497 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:37:57,497 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 2 times [2022-03-19 04:37:57,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:37:57,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836673594] [2022-03-19 04:37:57,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:37:57,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:37:57,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:37:57,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482454756] [2022-03-19 04:37:57,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:37:57,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:57,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:37:57,510 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:37:57,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 04:37:57,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:37:57,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:37:57,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 04:37:57,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:37:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-19 04:37:57,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:37:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-19 04:37:57,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:37:57,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836673594] [2022-03-19 04:37:57,923 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:37:57,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482454756] [2022-03-19 04:37:57,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482454756] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:37:57,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:37:57,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-03-19 04:37:57,925 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:37:57,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [829276786] [2022-03-19 04:37:57,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [829276786] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:37:57,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:37:57,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 04:37:57,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938425754] [2022-03-19 04:37:57,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:37:57,926 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 04:37:57,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:57,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 04:37:57,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-19 04:37:57,928 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-19 04:37:58,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:37:58,107 INFO L93 Difference]: Finished difference Result 124 states and 173 transitions. [2022-03-19 04:37:58,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 04:37:58,107 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2022-03-19 04:37:58,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:37:58,109 INFO L225 Difference]: With dead ends: 124 [2022-03-19 04:37:58,109 INFO L226 Difference]: Without dead ends: 121 [2022-03-19 04:37:58,109 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-19 04:37:58,110 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 21 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:37:58,110 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 290 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:37:58,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-19 04:37:58,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2022-03-19 04:37:58,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 64 states have internal predecessors, (75), 47 states have call successors, (47), 9 states have call predecessors, (47), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-19 04:37:58,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 166 transitions. [2022-03-19 04:37:58,130 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 166 transitions. Word has length 75 [2022-03-19 04:37:58,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:37:58,131 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 166 transitions. [2022-03-19 04:37:58,131 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-19 04:37:58,131 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 166 transitions. [2022-03-19 04:37:58,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-19 04:37:58,132 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:37:58,132 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 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] [2022-03-19 04:37:58,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 04:37:58,361 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-19 04:37:58,362 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:37:58,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:37:58,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 3 times [2022-03-19 04:37:58,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:58,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [877488635] [2022-03-19 04:37:58,363 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:37:58,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 4 times [2022-03-19 04:37:58,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:37:58,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637531152] [2022-03-19 04:37:58,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:37:58,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:37:58,373 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:37:58,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598958690] [2022-03-19 04:37:58,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:37:58,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:58,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:37:58,375 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:37:58,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 04:37:58,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:37:58,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:37:58,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 04:37:58,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:37:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-19 04:37:58,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:37:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-19 04:37:59,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:37:59,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637531152] [2022-03-19 04:37:59,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:37:59,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598958690] [2022-03-19 04:37:59,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598958690] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:37:59,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:37:59,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2022-03-19 04:37:59,261 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:37:59,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [877488635] [2022-03-19 04:37:59,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [877488635] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:37:59,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:37:59,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 04:37:59,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282219356] [2022-03-19 04:37:59,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:37:59,262 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 04:37:59,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:59,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 04:37:59,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-19 04:37:59,263 INFO L87 Difference]: Start difference. First operand 118 states and 166 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 04:37:59,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:37:59,518 INFO L93 Difference]: Finished difference Result 130 states and 176 transitions. [2022-03-19 04:37:59,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 04:37:59,518 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2022-03-19 04:37:59,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:37:59,519 INFO L225 Difference]: With dead ends: 130 [2022-03-19 04:37:59,519 INFO L226 Difference]: Without dead ends: 128 [2022-03-19 04:37:59,520 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-03-19 04:37:59,520 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 30 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:37:59,521 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 296 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:37:59,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-19 04:37:59,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2022-03-19 04:37:59,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 70 states have internal predecessors, (81), 47 states have call successors, (47), 11 states have call predecessors, (47), 10 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-19 04:37:59,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 172 transitions. [2022-03-19 04:37:59,552 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 172 transitions. Word has length 80 [2022-03-19 04:37:59,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:37:59,552 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 172 transitions. [2022-03-19 04:37:59,552 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 04:37:59,552 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 172 transitions. [2022-03-19 04:37:59,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-19 04:37:59,553 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:37:59,553 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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] [2022-03-19 04:37:59,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 04:37:59,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 04:37:59,767 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:37:59,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:37:59,768 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 5 times [2022-03-19 04:37:59,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:59,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1418163894] [2022-03-19 04:37:59,769 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:37:59,769 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 6 times [2022-03-19 04:37:59,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:37:59,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083213157] [2022-03-19 04:37:59,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:37:59,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:37:59,780 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:37:59,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950626092] [2022-03-19 04:37:59,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:37:59,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:59,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:37:59,804 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:37:59,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 04:37:59,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 04:37:59,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:37:59,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-19 04:37:59,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:38:00,438 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-03-19 04:38:00,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:38:00,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:38:00,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083213157] [2022-03-19 04:38:00,551 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:38:00,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950626092] [2022-03-19 04:38:00,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950626092] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:38:00,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:38:00,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-19 04:38:00,552 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:38:00,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1418163894] [2022-03-19 04:38:00,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1418163894] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:38:00,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:38:00,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 04:38:00,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461174833] [2022-03-19 04:38:00,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:38:00,553 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 04:38:00,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:38:00,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 04:38:00,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-19 04:38:00,554 INFO L87 Difference]: Start difference. First operand 126 states and 172 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-19 04:38:00,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:38:00,849 INFO L93 Difference]: Finished difference Result 134 states and 179 transitions. [2022-03-19 04:38:00,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 04:38:00,850 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2022-03-19 04:38:00,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:38:00,851 INFO L225 Difference]: With dead ends: 134 [2022-03-19 04:38:00,851 INFO L226 Difference]: Without dead ends: 132 [2022-03-19 04:38:00,852 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-03-19 04:38:00,852 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:38:00,852 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 299 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:38:00,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-19 04:38:00,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-03-19 04:38:00,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 73 states have internal predecessors, (84), 47 states have call successors, (47), 12 states have call predecessors, (47), 11 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-19 04:38:00,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 175 transitions. [2022-03-19 04:38:00,873 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 175 transitions. Word has length 85 [2022-03-19 04:38:00,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:38:00,873 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 175 transitions. [2022-03-19 04:38:00,873 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-19 04:38:00,873 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 175 transitions. [2022-03-19 04:38:00,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-19 04:38:00,874 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:38:00,874 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1] [2022-03-19 04:38:00,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 04:38:01,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 04:38:01,096 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:38:01,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:38:01,096 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 1 times [2022-03-19 04:38:01,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:38:01,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [458038736] [2022-03-19 04:38:01,096 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:38:01,096 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 2 times [2022-03-19 04:38:01,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:38:01,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856459706] [2022-03-19 04:38:01,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:38:01,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:38:01,106 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:38:01,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460930529] [2022-03-19 04:38:01,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:38:01,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:38:01,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:38:01,110 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:38:01,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 04:38:01,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:38:01,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:38:01,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 04:38:01,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:38:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-19 04:38:01,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:38:01,984 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-19 04:38:01,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:38:01,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856459706] [2022-03-19 04:38:01,984 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:38:01,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460930529] [2022-03-19 04:38:01,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460930529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:38:01,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:38:01,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-19 04:38:01,985 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:38:01,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [458038736] [2022-03-19 04:38:01,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [458038736] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:38:01,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:38:01,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 04:38:01,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220171403] [2022-03-19 04:38:01,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:38:01,986 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 04:38:01,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:38:01,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 04:38:01,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-19 04:38:01,986 INFO L87 Difference]: Start difference. First operand 130 states and 175 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-19 04:38:02,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:38:02,201 INFO L93 Difference]: Finished difference Result 157 states and 211 transitions. [2022-03-19 04:38:02,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 04:38:02,201 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 91 [2022-03-19 04:38:02,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:38:02,202 INFO L225 Difference]: With dead ends: 157 [2022-03-19 04:38:02,202 INFO L226 Difference]: Without dead ends: 154 [2022-03-19 04:38:02,203 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-03-19 04:38:02,203 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 19 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:38:02,204 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 378 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:38:02,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-19 04:38:02,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2022-03-19 04:38:02,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 86 states have internal predecessors, (99), 55 states have call successors, (55), 14 states have call predecessors, (55), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-19 04:38:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 206 transitions. [2022-03-19 04:38:02,236 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 206 transitions. Word has length 91 [2022-03-19 04:38:02,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:38:02,237 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 206 transitions. [2022-03-19 04:38:02,237 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-19 04:38:02,237 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 206 transitions. [2022-03-19 04:38:02,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-19 04:38:02,238 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:38:02,238 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 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, 1, 1, 1, 1] [2022-03-19 04:38:02,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 04:38:02,462 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 04:38:02,462 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:38:02,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:38:02,462 INFO L85 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 7 times [2022-03-19 04:38:02,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:38:02,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [694158520] [2022-03-19 04:38:02,463 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:38:02,463 INFO L85 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 8 times [2022-03-19 04:38:02,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:38:02,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409014674] [2022-03-19 04:38:02,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:38:02,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:38:02,472 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:38:02,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379631065] [2022-03-19 04:38:02,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:38:02,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:38:02,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:38:02,474 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:38:02,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 04:38:02,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:38:02,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:38:02,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 04:38:02,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:38:02,687 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-03-19 04:38:02,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:38:02,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:38:02,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409014674] [2022-03-19 04:38:02,688 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:38:02,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379631065] [2022-03-19 04:38:02,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379631065] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:38:02,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:38:02,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:38:02,689 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:38:02,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [694158520] [2022-03-19 04:38:02,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [694158520] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:38:02,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:38:02,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:38:02,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688133183] [2022-03-19 04:38:02,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:38:02,689 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:38:02,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:38:02,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:38:02,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:38:02,690 INFO L87 Difference]: Start difference. First operand 153 states and 206 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-03-19 04:38:02,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:38:02,765 INFO L93 Difference]: Finished difference Result 201 states and 280 transitions. [2022-03-19 04:38:02,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 04:38:02,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 100 [2022-03-19 04:38:02,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:38:02,769 INFO L225 Difference]: With dead ends: 201 [2022-03-19 04:38:02,769 INFO L226 Difference]: Without dead ends: 156 [2022-03-19 04:38:02,770 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-19 04:38:02,770 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:38:02,770 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 188 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:38:02,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-19 04:38:02,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 147. [2022-03-19 04:38:02,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 78 states have (on average 1.1282051282051282) internal successors, (88), 80 states have internal predecessors, (88), 55 states have call successors, (55), 14 states have call predecessors, (55), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-19 04:38:02,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 195 transitions. [2022-03-19 04:38:02,795 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 195 transitions. Word has length 100 [2022-03-19 04:38:02,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:38:02,795 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 195 transitions. [2022-03-19 04:38:02,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-03-19 04:38:02,796 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 195 transitions. [2022-03-19 04:38:02,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-19 04:38:02,797 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:38:02,797 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 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] [2022-03-19 04:38:02,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-19 04:38:03,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 04:38:03,020 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:38:03,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:38:03,020 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 1 times [2022-03-19 04:38:03,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:38:03,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1185077714] [2022-03-19 04:38:03,021 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:38:03,021 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 2 times [2022-03-19 04:38:03,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:38:03,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845918858] [2022-03-19 04:38:03,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:38:03,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:38:03,030 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:38:03,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1761043310] [2022-03-19 04:38:03,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:38:03,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:38:03,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:38:03,032 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:38:03,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 04:38:03,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:38:03,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:38:03,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-19 04:38:03,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:38:04,209 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 87 proven. 52 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-03-19 04:38:04,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:38:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 81 proven. 43 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-19 04:38:18,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:38:18,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845918858] [2022-03-19 04:38:18,722 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:38:18,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761043310] [2022-03-19 04:38:18,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761043310] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:38:18,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:38:18,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-03-19 04:38:18,723 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:38:18,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1185077714] [2022-03-19 04:38:18,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1185077714] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:38:18,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:38:18,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 04:38:18,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360697845] [2022-03-19 04:38:18,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:38:18,724 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 04:38:18,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:38:18,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 04:38:18,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-03-19 04:38:18,725 INFO L87 Difference]: Start difference. First operand 147 states and 195 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-19 04:38:22,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:38:22,617 INFO L93 Difference]: Finished difference Result 154 states and 201 transitions. [2022-03-19 04:38:22,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 04:38:22,617 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) Word has length 107 [2022-03-19 04:38:22,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:38:22,619 INFO L225 Difference]: With dead ends: 154 [2022-03-19 04:38:22,619 INFO L226 Difference]: Without dead ends: 152 [2022-03-19 04:38:22,619 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2022-03-19 04:38:22,620 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:38:22,620 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 396 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 04:38:22,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-19 04:38:22,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 128. [2022-03-19 04:38:22,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 70 states have internal predecessors, (77), 47 states have call successors, (47), 13 states have call predecessors, (47), 12 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-19 04:38:22,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 168 transitions. [2022-03-19 04:38:22,640 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 168 transitions. Word has length 107 [2022-03-19 04:38:22,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:38:22,640 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 168 transitions. [2022-03-19 04:38:22,640 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-19 04:38:22,641 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 168 transitions. [2022-03-19 04:38:22,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-19 04:38:22,642 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:38:22,642 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:38:22,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 04:38:22,855 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 04:38:22,855 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:38:22,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:38:22,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 3 times [2022-03-19 04:38:22,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:38:22,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1753131291] [2022-03-19 04:38:22,857 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:38:22,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 4 times [2022-03-19 04:38:22,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:38:22,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373233235] [2022-03-19 04:38:22,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:38:22,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:38:22,866 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:38:22,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [822587602] [2022-03-19 04:38:22,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:38:22,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:38:22,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:38:22,867 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:38:22,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 04:38:22,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:38:22,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:38:22,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-19 04:38:22,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:38:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 70 proven. 34 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 04:38:23,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:38:26,104 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 70 proven. 34 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 04:38:26,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:38:26,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373233235] [2022-03-19 04:38:26,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:38:26,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822587602] [2022-03-19 04:38:26,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822587602] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:38:26,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:38:26,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2022-03-19 04:38:26,105 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:38:26,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1753131291] [2022-03-19 04:38:26,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1753131291] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:38:26,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:38:26,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 04:38:26,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501503125] [2022-03-19 04:38:26,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:38:26,106 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 04:38:26,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:38:26,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 04:38:26,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:38:26,107 INFO L87 Difference]: Start difference. First operand 128 states and 168 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 04:38:26,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:38:26,953 INFO L93 Difference]: Finished difference Result 162 states and 215 transitions. [2022-03-19 04:38:26,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 04:38:26,954 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 113 [2022-03-19 04:38:26,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:38:26,955 INFO L225 Difference]: With dead ends: 162 [2022-03-19 04:38:26,955 INFO L226 Difference]: Without dead ends: 159 [2022-03-19 04:38:26,955 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2022-03-19 04:38:26,956 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 27 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 04:38:26,956 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 549 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 04:38:26,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-19 04:38:26,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2022-03-19 04:38:26,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 85 states have internal predecessors, (94), 59 states have call successors, (59), 15 states have call predecessors, (59), 14 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-03-19 04:38:26,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 209 transitions. [2022-03-19 04:38:26,982 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 209 transitions. Word has length 113 [2022-03-19 04:38:26,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:38:26,982 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 209 transitions. [2022-03-19 04:38:26,982 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 04:38:26,983 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 209 transitions. [2022-03-19 04:38:26,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-19 04:38:26,984 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:38:26,984 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 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, 1, 1, 1, 1] [2022-03-19 04:38:27,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 04:38:27,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:38:27,187 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:38:27,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:38:27,188 INFO L85 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 5 times [2022-03-19 04:38:27,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:38:27,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [371930718] [2022-03-19 04:38:27,188 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:38:27,188 INFO L85 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 6 times [2022-03-19 04:38:27,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:38:27,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986500193] [2022-03-19 04:38:27,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:38:27,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:38:27,200 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:38:27,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377175285] [2022-03-19 04:38:27,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:38:27,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:38:27,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:38:27,201 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:38:27,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 04:38:27,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 04:38:27,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:38:27,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 04:38:27,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:38:27,401 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-03-19 04:38:27,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:38:27,555 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-03-19 04:38:27,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:38:27,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986500193] [2022-03-19 04:38:27,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:38:27,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377175285] [2022-03-19 04:38:27,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377175285] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:38:27,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:38:27,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-03-19 04:38:27,556 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:38:27,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [371930718] [2022-03-19 04:38:27,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [371930718] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:38:27,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:38:27,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 04:38:27,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663569721] [2022-03-19 04:38:27,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:38:27,557 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 04:38:27,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:38:27,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 04:38:27,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-19 04:38:27,557 INFO L87 Difference]: Start difference. First operand 157 states and 209 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-03-19 04:38:27,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:38:27,744 INFO L93 Difference]: Finished difference Result 211 states and 298 transitions. [2022-03-19 04:38:27,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 04:38:27,745 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 116 [2022-03-19 04:38:27,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:38:27,747 INFO L225 Difference]: With dead ends: 211 [2022-03-19 04:38:27,747 INFO L226 Difference]: Without dead ends: 203 [2022-03-19 04:38:27,748 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 227 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-03-19 04:38:27,748 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 14 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:38:27,748 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 359 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:38:27,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-19 04:38:27,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 184. [2022-03-19 04:38:27,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 94 states have (on average 1.1595744680851063) internal successors, (109), 96 states have internal predecessors, (109), 75 states have call successors, (75), 15 states have call predecessors, (75), 14 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-19 04:38:27,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 256 transitions. [2022-03-19 04:38:27,807 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 256 transitions. Word has length 116 [2022-03-19 04:38:27,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:38:27,808 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 256 transitions. [2022-03-19 04:38:27,808 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-03-19 04:38:27,808 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 256 transitions. [2022-03-19 04:38:27,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-19 04:38:27,810 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:38:27,810 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2022-03-19 04:38:27,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 04:38:28,033 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 04:38:28,034 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:38:28,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:38:28,034 INFO L85 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 3 times [2022-03-19 04:38:28,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:38:28,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1191293194] [2022-03-19 04:38:28,034 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:38:28,034 INFO L85 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 4 times [2022-03-19 04:38:28,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:38:28,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449128296] [2022-03-19 04:38:28,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:38:28,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:38:28,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:38:28,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312051578] [2022-03-19 04:38:28,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:38:28,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:38:28,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:38:28,043 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:38:28,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 04:38:28,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:38:28,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:38:28,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 04:38:28,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:38:28,246 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-03-19 04:38:28,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:38:28,435 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-03-19 04:38:28,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:38:28,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449128296] [2022-03-19 04:38:28,435 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:38:28,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312051578] [2022-03-19 04:38:28,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312051578] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:38:28,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:38:28,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-19 04:38:28,437 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:38:28,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1191293194] [2022-03-19 04:38:28,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1191293194] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:38:28,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:38:28,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 04:38:28,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697339507] [2022-03-19 04:38:28,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:38:28,438 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 04:38:28,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:38:28,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 04:38:28,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-19 04:38:28,438 INFO L87 Difference]: Start difference. First operand 184 states and 256 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-19 04:38:28,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:38:28,658 INFO L93 Difference]: Finished difference Result 198 states and 267 transitions. [2022-03-19 04:38:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 04:38:28,658 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 122 [2022-03-19 04:38:28,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:38:28,659 INFO L225 Difference]: With dead ends: 198 [2022-03-19 04:38:28,660 INFO L226 Difference]: Without dead ends: 195 [2022-03-19 04:38:28,660 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 04:38:28,660 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:38:28,660 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 182 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:38:28,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-19 04:38:28,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2022-03-19 04:38:28,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 103 states have (on average 1.145631067961165) internal successors, (118), 104 states have internal predecessors, (118), 73 states have call successors, (73), 18 states have call predecessors, (73), 17 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2022-03-19 04:38:28,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 262 transitions. [2022-03-19 04:38:28,696 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 262 transitions. Word has length 122 [2022-03-19 04:38:28,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:38:28,696 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 262 transitions. [2022-03-19 04:38:28,696 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-19 04:38:28,696 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 262 transitions. [2022-03-19 04:38:28,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-19 04:38:28,698 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:38:28,698 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:38:28,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 04:38:28,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 04:38:28,907 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:38:28,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:38:28,908 INFO L85 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 5 times [2022-03-19 04:38:28,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:38:28,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1360993814] [2022-03-19 04:38:28,908 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:38:28,908 INFO L85 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 6 times [2022-03-19 04:38:28,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:38:28,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163526107] [2022-03-19 04:38:28,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:38:28,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:38:28,916 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:38:28,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705072526] [2022-03-19 04:38:28,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:38:28,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:38:28,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:38:28,918 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:38:28,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 04:38:28,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 04:38:28,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:38:28,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-19 04:38:28,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:38:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 70 proven. 94 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-03-19 04:38:29,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:38:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 89 proven. 75 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-03-19 04:38:31,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:38:31,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163526107] [2022-03-19 04:38:31,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:38:31,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705072526] [2022-03-19 04:38:31,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705072526] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:38:31,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:38:31,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2022-03-19 04:38:31,564 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:38:31,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1360993814] [2022-03-19 04:38:31,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1360993814] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:38:31,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:38:31,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 04:38:31,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824704644] [2022-03-19 04:38:31,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:38:31,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 04:38:31,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:38:31,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 04:38:31,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-03-19 04:38:31,565 INFO L87 Difference]: Start difference. First operand 194 states and 262 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-19 04:38:32,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:38:32,281 INFO L93 Difference]: Finished difference Result 265 states and 355 transitions. [2022-03-19 04:38:32,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 04:38:32,281 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) Word has length 127 [2022-03-19 04:38:32,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:38:32,283 INFO L225 Difference]: With dead ends: 265 [2022-03-19 04:38:32,283 INFO L226 Difference]: Without dead ends: 263 [2022-03-19 04:38:32,284 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=227, Invalid=895, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 04:38:32,284 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 38 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 04:38:32,284 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 585 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 04:38:32,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-19 04:38:32,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 260. [2022-03-19 04:38:32,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 139 states have (on average 1.1366906474820144) internal successors, (158), 140 states have internal predecessors, (158), 97 states have call successors, (97), 24 states have call predecessors, (97), 23 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2022-03-19 04:38:32,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 350 transitions. [2022-03-19 04:38:32,324 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 350 transitions. Word has length 127 [2022-03-19 04:38:32,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:38:32,325 INFO L478 AbstractCegarLoop]: Abstraction has 260 states and 350 transitions. [2022-03-19 04:38:32,325 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-19 04:38:32,325 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 350 transitions. [2022-03-19 04:38:32,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-19 04:38:32,326 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:38:32,327 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:38:32,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 04:38:32,542 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 04:38:32,543 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:38:32,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:38:32,543 INFO L85 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 7 times [2022-03-19 04:38:32,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:38:32,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [543653831] [2022-03-19 04:38:32,544 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:38:32,544 INFO L85 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 8 times [2022-03-19 04:38:32,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:38:32,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102400552] [2022-03-19 04:38:32,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:38:32,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:38:32,551 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:38:32,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110803126] [2022-03-19 04:38:32,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:38:32,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:38:32,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:38:32,553 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:38:32,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 04:38:32,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:38:32,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:38:32,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-19 04:38:32,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:38:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 142 proven. 88 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-03-19 04:38:33,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:38:36,351 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:38:37,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:38:37,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102400552] [2022-03-19 04:38:37,736 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:38:37,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110803126] [2022-03-19 04:38:37,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110803126] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:38:37,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:38:37,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-19 04:38:37,737 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:38:37,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [543653831] [2022-03-19 04:38:37,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [543653831] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:38:37,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:38:37,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 04:38:37,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14524848] [2022-03-19 04:38:37,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:38:37,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 04:38:37,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:38:37,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 04:38:37,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:38:37,738 INFO L87 Difference]: Start difference. First operand 260 states and 350 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-19 04:38:41,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:38:41,560 INFO L93 Difference]: Finished difference Result 268 states and 357 transitions. [2022-03-19 04:38:41,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 04:38:41,561 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 129 [2022-03-19 04:38:41,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:38:41,562 INFO L225 Difference]: With dead ends: 268 [2022-03-19 04:38:41,562 INFO L226 Difference]: Without dead ends: 266 [2022-03-19 04:38:41,563 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 142 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=159, Invalid=652, Unknown=1, NotChecked=0, Total=812 [2022-03-19 04:38:41,563 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 34 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:38:41,563 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 394 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 04:38:41,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-03-19 04:38:41,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2022-03-19 04:38:41,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 142 states have (on average 1.1338028169014085) internal successors, (161), 143 states have internal predecessors, (161), 97 states have call successors, (97), 25 states have call predecessors, (97), 24 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2022-03-19 04:38:41,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 353 transitions. [2022-03-19 04:38:41,608 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 353 transitions. Word has length 129 [2022-03-19 04:38:41,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:38:41,608 INFO L478 AbstractCegarLoop]: Abstraction has 264 states and 353 transitions. [2022-03-19 04:38:41,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-19 04:38:41,608 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 353 transitions. [2022-03-19 04:38:41,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-19 04:38:41,610 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:38:41,610 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 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, 1] [2022-03-19 04:38:41,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 04:38:41,825 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:38:41,826 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:38:41,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:38:41,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 9 times [2022-03-19 04:38:41,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:38:41,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1182200235] [2022-03-19 04:38:41,827 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:38:41,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 10 times [2022-03-19 04:38:41,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:38:41,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440617887] [2022-03-19 04:38:41,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:38:41,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:38:41,834 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:38:41,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017897330] [2022-03-19 04:38:41,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:38:41,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:38:41,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:38:41,835 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:38:41,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 04:38:41,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:38:41,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:38:41,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-19 04:38:41,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:38:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 103 proven. 117 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-03-19 04:38:43,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:39:21,851 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 112 proven. 87 refuted. 3 times theorem prover too weak. 348 trivial. 0 not checked. [2022-03-19 04:39:21,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:39:21,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440617887] [2022-03-19 04:39:21,851 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:39:21,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017897330] [2022-03-19 04:39:21,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017897330] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:39:21,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:39:21,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 29 [2022-03-19 04:39:21,852 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:39:21,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1182200235] [2022-03-19 04:39:21,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1182200235] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:39:21,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:39:21,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 04:39:21,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029755310] [2022-03-19 04:39:21,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:39:21,852 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 04:39:21,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:39:21,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 04:39:21,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=628, Unknown=5, NotChecked=0, Total=812 [2022-03-19 04:39:21,853 INFO L87 Difference]: Start difference. First operand 264 states and 353 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-19 04:39:26,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:39:26,575 INFO L93 Difference]: Finished difference Result 277 states and 364 transitions. [2022-03-19 04:39:26,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 04:39:26,576 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 132 [2022-03-19 04:39:26,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:39:26,577 INFO L225 Difference]: With dead ends: 277 [2022-03-19 04:39:26,577 INFO L226 Difference]: Without dead ends: 275 [2022-03-19 04:39:26,578 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 232 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=258, Invalid=926, Unknown=6, NotChecked=0, Total=1190 [2022-03-19 04:39:26,580 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 31 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 04:39:26,580 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 467 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 04:39:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-03-19 04:39:26,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 239. [2022-03-19 04:39:26,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 130 states have (on average 1.1307692307692307) internal successors, (147), 131 states have internal predecessors, (147), 85 states have call successors, (85), 24 states have call predecessors, (85), 23 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-19 04:39:26,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 315 transitions. [2022-03-19 04:39:26,625 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 315 transitions. Word has length 132 [2022-03-19 04:39:26,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:39:26,626 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 315 transitions. [2022-03-19 04:39:26,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-19 04:39:26,626 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 315 transitions. [2022-03-19 04:39:26,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 04:39:26,627 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:39:26,627 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-03-19 04:39:26,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 04:39:26,850 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:39:26,850 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:39:26,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:39:26,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 7 times [2022-03-19 04:39:26,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:39:26,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1725734306] [2022-03-19 04:39:26,851 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:39:26,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 8 times [2022-03-19 04:39:26,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:39:26,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861847154] [2022-03-19 04:39:26,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:39:26,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:39:26,859 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:39:26,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504173771] [2022-03-19 04:39:26,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:39:26,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:39:26,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:39:26,860 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:39:26,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 04:39:26,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:39:26,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:39:26,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 04:39:26,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:39:27,746 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 102 proven. 52 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-19 04:39:27,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:39:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 102 proven. 52 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-19 04:39:29,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:39:29,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861847154] [2022-03-19 04:39:29,956 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:39:29,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504173771] [2022-03-19 04:39:29,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504173771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:39:29,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:39:29,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2022-03-19 04:39:29,956 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:39:29,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1725734306] [2022-03-19 04:39:29,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1725734306] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:39:29,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:39:29,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 04:39:29,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312715489] [2022-03-19 04:39:29,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:39:29,957 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 04:39:29,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:39:29,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 04:39:29,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-03-19 04:39:29,958 INFO L87 Difference]: Start difference. First operand 239 states and 315 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 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) [2022-03-19 04:39:30,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:39:30,909 INFO L93 Difference]: Finished difference Result 284 states and 377 transitions. [2022-03-19 04:39:30,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 04:39:30,910 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 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 135 [2022-03-19 04:39:30,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:39:30,911 INFO L225 Difference]: With dead ends: 284 [2022-03-19 04:39:30,911 INFO L226 Difference]: Without dead ends: 281 [2022-03-19 04:39:30,912 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 243 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2022-03-19 04:39:30,913 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 34 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 04:39:30,913 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 431 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 04:39:30,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-19 04:39:30,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 278. [2022-03-19 04:39:30,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 150 states have (on average 1.1333333333333333) internal successors, (170), 151 states have internal predecessors, (170), 101 states have call successors, (101), 27 states have call predecessors, (101), 26 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-03-19 04:39:30,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 370 transitions. [2022-03-19 04:39:30,971 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 370 transitions. Word has length 135 [2022-03-19 04:39:30,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:39:30,971 INFO L478 AbstractCegarLoop]: Abstraction has 278 states and 370 transitions. [2022-03-19 04:39:30,971 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 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) [2022-03-19 04:39:30,972 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 370 transitions. [2022-03-19 04:39:30,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-19 04:39:30,973 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:39:30,973 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-19 04:39:30,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 04:39:31,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-19 04:39:31,175 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:39:31,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:39:31,176 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 9 times [2022-03-19 04:39:31,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:39:31,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [800425809] [2022-03-19 04:39:31,176 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:39:31,176 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 10 times [2022-03-19 04:39:31,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:39:31,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560413523] [2022-03-19 04:39:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:39:31,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:39:31,184 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:39:31,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293681847] [2022-03-19 04:39:31,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:39:31,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:39:31,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:39:31,186 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:39:31,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 04:39:31,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:39:31,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:39:31,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-19 04:39:31,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:39:33,066 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:39:33,070 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:39:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 144 proven. 111 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-19 04:39:33,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:39:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 169 proven. 21 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2022-03-19 04:39:37,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:39:37,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560413523] [2022-03-19 04:39:37,121 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:39:37,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293681847] [2022-03-19 04:39:37,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293681847] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:39:37,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:39:37,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15] total 33 [2022-03-19 04:39:37,122 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:39:37,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [800425809] [2022-03-19 04:39:37,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [800425809] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:39:37,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:39:37,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 04:39:37,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648865821] [2022-03-19 04:39:37,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:39:37,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 04:39:37,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:39:37,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 04:39:37,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 04:39:37,125 INFO L87 Difference]: Start difference. First operand 278 states and 370 transitions. Second operand has 23 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 11 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-19 04:39:40,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:39:40,335 INFO L93 Difference]: Finished difference Result 327 states and 435 transitions. [2022-03-19 04:39:40,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 04:39:40,336 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 11 states have call predecessors, (23), 9 states have call successors, (23) Word has length 138 [2022-03-19 04:39:40,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:39:40,338 INFO L225 Difference]: With dead ends: 327 [2022-03-19 04:39:40,338 INFO L226 Difference]: Without dead ends: 324 [2022-03-19 04:39:40,339 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 04:39:40,339 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 53 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-19 04:39:40,340 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 619 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-19 04:39:40,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-03-19 04:39:40,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 321. [2022-03-19 04:39:40,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 173 states have (on average 1.1329479768786128) internal successors, (196), 174 states have internal predecessors, (196), 117 states have call successors, (117), 31 states have call predecessors, (117), 30 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-19 04:39:40,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 428 transitions. [2022-03-19 04:39:40,405 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 428 transitions. Word has length 138 [2022-03-19 04:39:40,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:39:40,405 INFO L478 AbstractCegarLoop]: Abstraction has 321 states and 428 transitions. [2022-03-19 04:39:40,405 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 11 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-19 04:39:40,405 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 428 transitions. [2022-03-19 04:39:40,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-19 04:39:40,407 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:39:40,407 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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] [2022-03-19 04:39:40,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 04:39:40,623 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-19 04:39:40,623 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:39:40,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:39:40,624 INFO L85 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 11 times [2022-03-19 04:39:40,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:39:40,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1260374715] [2022-03-19 04:39:40,624 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:39:40,625 INFO L85 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 12 times [2022-03-19 04:39:40,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:39:40,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360390041] [2022-03-19 04:39:40,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:39:40,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:39:40,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:39:40,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261723057] [2022-03-19 04:39:40,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:39:40,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:39:40,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:39:40,633 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:39:40,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 04:39:40,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 04:39:40,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:39:40,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-19 04:39:40,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:39:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 109 proven. 76 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-03-19 04:39:41,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:39:41,709 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 149 proven. 31 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2022-03-19 04:39:41,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:39:41,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360390041] [2022-03-19 04:39:41,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:39:41,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261723057] [2022-03-19 04:39:41,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261723057] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:39:41,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:39:41,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2022-03-19 04:39:41,710 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:39:41,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1260374715] [2022-03-19 04:39:41,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1260374715] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:39:41,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:39:41,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 04:39:41,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855289178] [2022-03-19 04:39:41,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:39:41,711 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 04:39:41,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:39:41,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 04:39:41,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-19 04:39:41,712 INFO L87 Difference]: Start difference. First operand 321 states and 428 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 04:39:42,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:39:42,525 INFO L93 Difference]: Finished difference Result 360 states and 478 transitions. [2022-03-19 04:39:42,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 04:39:42,525 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 149 [2022-03-19 04:39:42,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:39:42,527 INFO L225 Difference]: With dead ends: 360 [2022-03-19 04:39:42,528 INFO L226 Difference]: Without dead ends: 358 [2022-03-19 04:39:42,528 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 279 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-03-19 04:39:42,528 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 39 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 04:39:42,529 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 405 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 04:39:42,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-03-19 04:39:42,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 354. [2022-03-19 04:39:42,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 191 states have (on average 1.130890052356021) internal successors, (216), 192 states have internal predecessors, (216), 129 states have call successors, (129), 34 states have call predecessors, (129), 33 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-03-19 04:39:42,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 472 transitions. [2022-03-19 04:39:42,615 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 472 transitions. Word has length 149 [2022-03-19 04:39:42,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:39:42,615 INFO L478 AbstractCegarLoop]: Abstraction has 354 states and 472 transitions. [2022-03-19 04:39:42,616 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 04:39:42,616 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 472 transitions. [2022-03-19 04:39:42,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-19 04:39:42,617 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:39:42,617 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:39:42,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 04:39:42,841 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:39:42,841 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:39:42,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:39:42,841 INFO L85 PathProgramCache]: Analyzing trace with hash -162755237, now seen corresponding path program 13 times [2022-03-19 04:39:42,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:39:42,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [609877000] [2022-03-19 04:39:42,842 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:39:42,842 INFO L85 PathProgramCache]: Analyzing trace with hash -162755237, now seen corresponding path program 14 times [2022-03-19 04:39:42,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:39:42,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651108629] [2022-03-19 04:39:42,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:39:42,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:39:42,849 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:39:42,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1819787609] [2022-03-19 04:39:42,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:39:42,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:39:42,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:39:42,851 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:39:42,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 04:39:42,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:39:42,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:39:42,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-19 04:39:42,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:39:43,997 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 160 proven. 116 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2022-03-19 04:39:43,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:39:44,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:39:44,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651108629] [2022-03-19 04:39:44,535 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:39:44,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819787609] [2022-03-19 04:39:44,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819787609] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:39:44,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:39:44,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-19 04:39:44,536 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:39:44,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [609877000] [2022-03-19 04:39:44,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [609877000] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:39:44,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:39:44,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 04:39:44,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436435648] [2022-03-19 04:39:44,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:39:44,536 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 04:39:44,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:39:44,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 04:39:44,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-03-19 04:39:44,537 INFO L87 Difference]: Start difference. First operand 354 states and 472 transitions. Second operand has 15 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-19 04:39:45,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:39:45,381 INFO L93 Difference]: Finished difference Result 363 states and 480 transitions. [2022-03-19 04:39:45,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 04:39:45,382 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) Word has length 151 [2022-03-19 04:39:45,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:39:45,385 INFO L225 Difference]: With dead ends: 363 [2022-03-19 04:39:45,385 INFO L226 Difference]: Without dead ends: 361 [2022-03-19 04:39:45,385 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-03-19 04:39:45,386 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 29 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 04:39:45,386 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 507 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 04:39:45,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-03-19 04:39:45,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 325. [2022-03-19 04:39:45,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 176 states have (on average 1.1306818181818181) internal successors, (199), 177 states have internal predecessors, (199), 117 states have call successors, (117), 32 states have call predecessors, (117), 31 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-19 04:39:45,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 431 transitions. [2022-03-19 04:39:45,462 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 431 transitions. Word has length 151 [2022-03-19 04:39:45,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:39:45,463 INFO L478 AbstractCegarLoop]: Abstraction has 325 states and 431 transitions. [2022-03-19 04:39:45,463 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-19 04:39:45,463 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 431 transitions. [2022-03-19 04:39:45,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-19 04:39:45,464 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:39:45,464 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2022-03-19 04:39:45,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 04:39:45,678 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:39:45,678 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:39:45,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:39:45,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1672449564, now seen corresponding path program 15 times [2022-03-19 04:39:45,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:39:45,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2045052191] [2022-03-19 04:39:45,679 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:39:45,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1672449564, now seen corresponding path program 16 times [2022-03-19 04:39:45,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:39:45,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817461521] [2022-03-19 04:39:45,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:39:45,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:39:45,690 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:39:45,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887708443] [2022-03-19 04:39:45,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:39:45,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:39:45,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:39:45,692 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:39:45,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 04:39:45,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:39:45,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:39:45,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-19 04:39:45,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:39:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 161 proven. 225 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-03-19 04:39:47,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:39:52,748 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_main_~p~0 (* (- 1) c_main_~q~0 c_main_~k~0))) (.cse3 (+ c_main_~r~0 (* (- 1) (* c_main_~s~0 c_main_~k~0))))) (let ((.cse0 (* .cse3 c_main_~y~0)) (.cse2 (* .cse1 c_main_~x~0))) (let ((.cse4 (+ .cse0 .cse2)) (.cse5 (* c_main_~q~0 c_main_~x~0)) (.cse6 (* c_main_~s~0 c_main_~y~0))) (or (not (= (+ (* c_main_~p~0 c_main_~x~0) (* c_main_~r~0 c_main_~y~0)) c_main_~a~0)) (= (+ .cse0 (* c_main_~xy~0 .cse1) .cse2 (* c_main_~yy~0 .cse3)) (+ .cse0 (* .cse4 c_main_~y~0) .cse2)) (not (= c_main_~c~0 .cse4)) (not (= (+ .cse5 .cse6 (* c_main_~b~0 c_main_~y~0)) (+ (* c_main_~q~0 c_main_~xy~0) (* c_main_~yy~0 c_main_~s~0) c_main_~b~0))) (<= c_main_~b~0 c_main_~c~0) (not (= c_main_~b~0 (+ .cse5 .cse6))))))) is different from true [2022-03-19 04:39:52,827 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:40:02,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:40:02,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817461521] [2022-03-19 04:40:02,591 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:40:02,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887708443] [2022-03-19 04:40:02,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887708443] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:40:02,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:40:02,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-19 04:40:02,592 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:40:02,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2045052191] [2022-03-19 04:40:02,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2045052191] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:40:02,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:40:02,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 04:40:02,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210342550] [2022-03-19 04:40:02,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:40:02,593 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 04:40:02,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:40:02,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 04:40:02,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=642, Unknown=2, NotChecked=54, Total=870 [2022-03-19 04:40:02,594 INFO L87 Difference]: Start difference. First operand 325 states and 431 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 11 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) [2022-03-19 04:40:07,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:40:07,070 INFO L93 Difference]: Finished difference Result 338 states and 442 transitions. [2022-03-19 04:40:07,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 04:40:07,070 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 11 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) Word has length 154 [2022-03-19 04:40:07,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:40:07,072 INFO L225 Difference]: With dead ends: 338 [2022-03-19 04:40:07,072 INFO L226 Difference]: Without dead ends: 336 [2022-03-19 04:40:07,073 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 160 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=218, Invalid=905, Unknown=3, NotChecked=64, Total=1190 [2022-03-19 04:40:07,073 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 47 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:40:07,074 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 515 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 04:40:07,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-03-19 04:40:07,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 333. [2022-03-19 04:40:07,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 182 states have (on average 1.1263736263736264) internal successors, (205), 183 states have internal predecessors, (205), 117 states have call successors, (117), 34 states have call predecessors, (117), 33 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-19 04:40:07,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 437 transitions. [2022-03-19 04:40:07,158 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 437 transitions. Word has length 154 [2022-03-19 04:40:07,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:40:07,159 INFO L478 AbstractCegarLoop]: Abstraction has 333 states and 437 transitions. [2022-03-19 04:40:07,159 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 11 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) [2022-03-19 04:40:07,159 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 437 transitions. [2022-03-19 04:40:07,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-19 04:40:07,160 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:40:07,160 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2022-03-19 04:40:07,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 04:40:07,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-19 04:40:07,368 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:40:07,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:40:07,368 INFO L85 PathProgramCache]: Analyzing trace with hash -2059109762, now seen corresponding path program 17 times [2022-03-19 04:40:07,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:40:07,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [882591611] [2022-03-19 04:40:07,368 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:40:07,369 INFO L85 PathProgramCache]: Analyzing trace with hash -2059109762, now seen corresponding path program 18 times [2022-03-19 04:40:07,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:40:07,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688700796] [2022-03-19 04:40:07,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:40:07,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:40:07,375 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:40:07,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [870865555] [2022-03-19 04:40:07,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:40:07,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:40:07,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:40:07,377 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:40:07,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 04:40:07,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 04:40:07,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:40:07,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-19 04:40:07,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:40:10,825 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:40:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 132 proven. 80 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2022-03-19 04:40:20,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:40:30,972 WARN L855 $PredicateComparison]: unable to prove that (forall ((main_~k~0 Int)) (let ((.cse5 (* (- 1) c_main_~q~0 main_~k~0)) (.cse4 (* c_main_~s~0 main_~k~0)) (.cse11 (* c_main_~p~0 c_main_~x~0)) (.cse12 (* c_main_~r~0 c_main_~y~0)) (.cse8 (* c_main_~s~0 main_~k~0 c_main_~y~0)) (.cse9 (* c_main_~q~0 c_main_~x~0)) (.cse14 (* (- 1) c_main_~r~0 c_main_~y~0)) (.cse15 (* c_main_~s~0 c_main_~y~0)) (.cse17 (* c_main_~q~0 main_~k~0 c_main_~x~0)) (.cse18 (* (- 1) c_main_~p~0 c_main_~x~0))) (or (let ((.cse2 (+ c_main_~q~0 (* (- 1) c_main_~p~0) (* (- 1) .cse5))) (.cse3 (+ c_main_~s~0 .cse4 (* (- 1) c_main_~r~0)))) (let ((.cse0 (* .cse3 c_main_~y~0)) (.cse1 (* .cse2 c_main_~x~0))) (= (+ .cse0 .cse1 (* c_main_~y~0 (+ .cse0 .cse1))) (+ .cse0 (* .cse2 c_main_~xy~0) (* c_main_~yy~0 .cse3) .cse1)))) (not (let ((.cse6 (+ (* (- 1) .cse4) c_main_~r~0)) (.cse7 (* (- 1) c_main_~q~0 main_~k~0 c_main_~x~0)) (.cse10 (* (- 1) c_main_~s~0 c_main_~y~0)) (.cse13 (* (- 1) c_main_~q~0 c_main_~x~0)) (.cse16 (* (- 1) c_main_~s~0 main_~k~0 c_main_~y~0)) (.cse19 (+ c_main_~p~0 .cse5))) (= (+ (* .cse6 c_main_~y~0) (* (+ .cse7 .cse8 .cse9 .cse10 .cse11 c_main_~c~0 .cse12 .cse13 .cse14 .cse15 .cse16 .cse17 .cse18) c_main_~y~0) (* .cse19 c_main_~x~0)) (+ (* c_main_~yy~0 .cse6) .cse7 .cse8 .cse9 .cse10 .cse11 c_main_~c~0 .cse12 .cse13 .cse14 .cse15 .cse16 (* c_main_~xy~0 .cse19) .cse17 .cse18)))) (<= (+ .cse11 c_main_~c~0 .cse12) (+ .cse8 .cse9 .cse15 .cse17)) (not (= c_main_~b~0 (+ .cse8 .cse9 c_main_~c~0 .cse14 .cse15 .cse17 .cse18)))))) is different from true [2022-03-19 04:40:45,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:40:45,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688700796] [2022-03-19 04:40:45,104 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:40:45,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870865555] [2022-03-19 04:40:45,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870865555] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:40:45,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:40:45,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-19 04:40:45,104 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:40:45,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [882591611] [2022-03-19 04:40:45,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [882591611] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:40:45,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:40:45,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 04:40:45,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659953144] [2022-03-19 04:40:45,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:40:45,105 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 04:40:45,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:40:45,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 04:40:45,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=605, Unknown=7, NotChecked=52, Total=812 [2022-03-19 04:40:45,107 INFO L87 Difference]: Start difference. First operand 333 states and 437 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-19 04:40:54,095 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 04:41:03,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:41:03,014 INFO L93 Difference]: Finished difference Result 351 states and 455 transitions. [2022-03-19 04:41:03,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 04:41:03,014 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 154 [2022-03-19 04:41:03,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:41:03,016 INFO L225 Difference]: With dead ends: 351 [2022-03-19 04:41:03,016 INFO L226 Difference]: Without dead ends: 349 [2022-03-19 04:41:03,017 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 39.6s TimeCoverageRelationStatistics Valid=221, Invalid=963, Unknown=10, NotChecked=66, Total=1260 [2022-03-19 04:41:03,017 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 41 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:41:03,018 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 353 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 609 Invalid, 0 Unknown, 14 Unchecked, 4.1s Time] [2022-03-19 04:41:03,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-03-19 04:41:03,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 339. [2022-03-19 04:41:03,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 187 states have (on average 1.1229946524064172) internal successors, (210), 187 states have internal predecessors, (210), 117 states have call successors, (117), 36 states have call predecessors, (117), 34 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-19 04:41:03,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 442 transitions. [2022-03-19 04:41:03,106 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 442 transitions. Word has length 154 [2022-03-19 04:41:03,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:41:03,106 INFO L478 AbstractCegarLoop]: Abstraction has 339 states and 442 transitions. [2022-03-19 04:41:03,107 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-19 04:41:03,107 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 442 transitions. [2022-03-19 04:41:03,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-19 04:41:03,108 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:41:03,108 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1] [2022-03-19 04:41:03,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-19 04:41:03,322 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-19 04:41:03,323 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:41:03,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:41:03,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1023835477, now seen corresponding path program 11 times [2022-03-19 04:41:03,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:41:03,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1530552385] [2022-03-19 04:41:03,324 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:41:03,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1023835477, now seen corresponding path program 12 times [2022-03-19 04:41:03,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:41:03,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249277420] [2022-03-19 04:41:03,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:41:03,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:41:03,331 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:41:03,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240704780] [2022-03-19 04:41:03,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:41:03,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:41:03,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:41:03,332 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:41:03,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 04:41:03,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 04:41:03,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:41:03,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-19 04:41:03,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:41:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 93 proven. 63 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2022-03-19 04:41:04,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:41:05,481 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:41:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 105 proven. 36 refuted. 0 times theorem prover too weak. 781 trivial. 0 not checked. [2022-03-19 04:41:11,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:41:11,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249277420] [2022-03-19 04:41:11,535 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:41:11,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240704780] [2022-03-19 04:41:11,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240704780] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:41:11,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:41:11,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 26 [2022-03-19 04:41:11,536 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:41:11,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1530552385] [2022-03-19 04:41:11,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1530552385] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:41:11,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:41:11,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 04:41:11,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638220697] [2022-03-19 04:41:11,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:41:11,536 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 04:41:11,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:41:11,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 04:41:11,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=547, Unknown=2, NotChecked=0, Total=650 [2022-03-19 04:41:11,537 INFO L87 Difference]: Start difference. First operand 339 states and 442 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 04:41:12,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:41:12,642 INFO L93 Difference]: Finished difference Result 355 states and 455 transitions. [2022-03-19 04:41:12,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 04:41:12,643 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 157 [2022-03-19 04:41:12,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:41:12,644 INFO L225 Difference]: With dead ends: 355 [2022-03-19 04:41:12,644 INFO L226 Difference]: Without dead ends: 352 [2022-03-19 04:41:12,645 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 288 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=161, Invalid=829, Unknown=2, NotChecked=0, Total=992 [2022-03-19 04:41:12,645 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 34 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 04:41:12,645 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 473 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 04:41:12,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-03-19 04:41:12,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 351. [2022-03-19 04:41:12,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 196 states have (on average 1.1122448979591837) internal successors, (218), 196 states have internal predecessors, (218), 117 states have call successors, (117), 39 states have call predecessors, (117), 37 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-19 04:41:12,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 450 transitions. [2022-03-19 04:41:12,729 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 450 transitions. Word has length 157 [2022-03-19 04:41:12,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:41:12,730 INFO L478 AbstractCegarLoop]: Abstraction has 351 states and 450 transitions. [2022-03-19 04:41:12,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 04:41:12,730 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 450 transitions. [2022-03-19 04:41:12,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-19 04:41:12,732 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:41:12,732 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2022-03-19 04:41:12,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-19 04:41:12,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-19 04:41:12,947 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:41:12,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:41:12,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1001336492, now seen corresponding path program 13 times [2022-03-19 04:41:12,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:41:12,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2028993852] [2022-03-19 04:41:12,948 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:41:12,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1001336492, now seen corresponding path program 14 times [2022-03-19 04:41:12,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:41:12,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769881999] [2022-03-19 04:41:12,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:41:12,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:41:12,956 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:41:12,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011040408] [2022-03-19 04:41:12,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:41:12,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:41:12,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:41:12,960 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:41:12,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 04:41:13,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:41:13,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:41:13,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-19 04:41:13,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:41:13,824 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:41:13,825 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:41:14,064 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 142 proven. 118 refuted. 0 times theorem prover too weak. 667 trivial. 0 not checked. [2022-03-19 04:41:14,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:41:17,380 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:41:17,383 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:41:19,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:41:19,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769881999] [2022-03-19 04:41:19,139 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:41:19,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011040408] [2022-03-19 04:41:19,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011040408] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:41:19,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:41:19,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-19 04:41:19,140 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:41:19,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2028993852] [2022-03-19 04:41:19,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2028993852] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:41:19,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:41:19,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 04:41:19,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138923041] [2022-03-19 04:41:19,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:41:19,140 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 04:41:19,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:41:19,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 04:41:19,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-03-19 04:41:19,141 INFO L87 Difference]: Start difference. First operand 351 states and 450 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-19 04:41:22,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:41:22,941 INFO L93 Difference]: Finished difference Result 396 states and 512 transitions. [2022-03-19 04:41:22,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 04:41:22,942 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 9 states have call successors, (27) Word has length 160 [2022-03-19 04:41:22,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:41:22,945 INFO L225 Difference]: With dead ends: 396 [2022-03-19 04:41:22,945 INFO L226 Difference]: Without dead ends: 393 [2022-03-19 04:41:22,946 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 231 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 04:41:22,946 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 37 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:41:22,947 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 667 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-19 04:41:22,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-03-19 04:41:23,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 390. [2022-03-19 04:41:23,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 216 states have (on average 1.1157407407407407) internal successors, (241), 216 states have internal predecessors, (241), 133 states have call successors, (133), 42 states have call predecessors, (133), 40 states have return successors, (131), 131 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-19 04:41:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 505 transitions. [2022-03-19 04:41:23,033 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 505 transitions. Word has length 160 [2022-03-19 04:41:23,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:41:23,033 INFO L478 AbstractCegarLoop]: Abstraction has 390 states and 505 transitions. [2022-03-19 04:41:23,033 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-19 04:41:23,033 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 505 transitions. [2022-03-19 04:41:23,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-19 04:41:23,035 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:41:23,035 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2022-03-19 04:41:23,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-19 04:41:23,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-19 04:41:23,251 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:41:23,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:41:23,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1560660366, now seen corresponding path program 15 times [2022-03-19 04:41:23,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:41:23,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1858987756] [2022-03-19 04:41:23,252 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:41:23,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1560660366, now seen corresponding path program 16 times [2022-03-19 04:41:23,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:41:23,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085748321] [2022-03-19 04:41:23,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:41:23,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:41:23,259 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:41:23,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402405683] [2022-03-19 04:41:23,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:41:23,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:41:23,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:41:23,260 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:41:23,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 04:41:23,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:41:23,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:41:23,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-19 04:41:23,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:41:24,659 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:41:24,660 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:41:24,976 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:41:26,996 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:41:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 219 proven. 161 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2022-03-19 04:41:27,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:41:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 251 proven. 19 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2022-03-19 04:41:32,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:41:32,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085748321] [2022-03-19 04:41:32,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:41:32,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402405683] [2022-03-19 04:41:32,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402405683] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:41:32,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:41:32,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 28 [2022-03-19 04:41:32,006 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:41:32,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1858987756] [2022-03-19 04:41:32,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1858987756] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:41:32,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:41:32,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 04:41:32,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418651303] [2022-03-19 04:41:32,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:41:32,006 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 04:41:32,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:41:32,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 04:41:32,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-03-19 04:41:32,007 INFO L87 Difference]: Start difference. First operand 390 states and 505 transitions. Second operand has 20 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 11 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 11 states have call predecessors, (27), 10 states have call successors, (27) [2022-03-19 04:41:36,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:41:36,015 INFO L93 Difference]: Finished difference Result 469 states and 612 transitions. [2022-03-19 04:41:36,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 04:41:36,016 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 11 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 11 states have call predecessors, (27), 10 states have call successors, (27) Word has length 160 [2022-03-19 04:41:36,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:41:36,020 INFO L225 Difference]: With dead ends: 469 [2022-03-19 04:41:36,021 INFO L226 Difference]: Without dead ends: 466 [2022-03-19 04:41:36,021 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 287 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 04:41:36,022 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 35 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:41:36,022 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 958 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-19 04:41:36,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-03-19 04:41:36,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 433. [2022-03-19 04:41:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 239 states have (on average 1.1171548117154813) internal successors, (267), 239 states have internal predecessors, (267), 149 states have call successors, (149), 46 states have call predecessors, (149), 44 states have return successors, (147), 147 states have call predecessors, (147), 147 states have call successors, (147) [2022-03-19 04:41:36,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 563 transitions. [2022-03-19 04:41:36,151 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 563 transitions. Word has length 160 [2022-03-19 04:41:36,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:41:36,151 INFO L478 AbstractCegarLoop]: Abstraction has 433 states and 563 transitions. [2022-03-19 04:41:36,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 11 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 11 states have call predecessors, (27), 10 states have call successors, (27) [2022-03-19 04:41:36,152 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 563 transitions. [2022-03-19 04:41:36,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-19 04:41:36,153 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:41:36,154 INFO L500 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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] [2022-03-19 04:41:36,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-19 04:41:36,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-19 04:41:36,367 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:41:36,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:41:36,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1302140698, now seen corresponding path program 19 times [2022-03-19 04:41:36,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:41:36,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [360767183] [2022-03-19 04:41:36,368 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:41:36,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1302140698, now seen corresponding path program 20 times [2022-03-19 04:41:36,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:41:36,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873770067] [2022-03-19 04:41:36,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:41:36,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:41:36,376 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:41:36,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1039311769] [2022-03-19 04:41:36,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:41:36,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:41:36,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:41:36,380 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:41:36,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 04:41:36,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:41:36,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:41:36,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-19 04:41:36,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:41:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 251 proven. 176 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2022-03-19 04:41:38,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:42:06,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 210 proven. 151 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-03-19 04:42:06,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:42:06,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873770067] [2022-03-19 04:42:06,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:42:06,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039311769] [2022-03-19 04:42:06,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039311769] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:42:06,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:42:06,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 35 [2022-03-19 04:42:06,639 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:42:06,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [360767183] [2022-03-19 04:42:06,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [360767183] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:42:06,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:42:06,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 04:42:06,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207889098] [2022-03-19 04:42:06,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:42:06,640 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 04:42:06,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:42:06,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 04:42:06,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=930, Unknown=3, NotChecked=0, Total=1190 [2022-03-19 04:42:06,641 INFO L87 Difference]: Start difference. First operand 433 states and 563 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) [2022-03-19 04:42:09,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:42:09,556 INFO L93 Difference]: Finished difference Result 489 states and 633 transitions. [2022-03-19 04:42:09,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 04:42:09,557 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) Word has length 173 [2022-03-19 04:42:09,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:42:09,559 INFO L225 Difference]: With dead ends: 489 [2022-03-19 04:42:09,559 INFO L226 Difference]: Without dead ends: 487 [2022-03-19 04:42:09,560 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 309 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=295, Invalid=1184, Unknown=3, NotChecked=0, Total=1482 [2022-03-19 04:42:09,560 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 56 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:42:09,560 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 647 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 04:42:09,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-03-19 04:42:09,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 480. [2022-03-19 04:42:09,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 265 states have (on average 1.1169811320754717) internal successors, (296), 265 states have internal predecessors, (296), 165 states have call successors, (165), 51 states have call predecessors, (165), 49 states have return successors, (163), 163 states have call predecessors, (163), 163 states have call successors, (163) [2022-03-19 04:42:09,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 624 transitions. [2022-03-19 04:42:09,669 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 624 transitions. Word has length 173 [2022-03-19 04:42:09,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:42:09,669 INFO L478 AbstractCegarLoop]: Abstraction has 480 states and 624 transitions. [2022-03-19 04:42:09,669 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) [2022-03-19 04:42:09,669 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 624 transitions. [2022-03-19 04:42:09,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-03-19 04:42:09,671 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:42:09,671 INFO L500 BasicCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:42:09,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-19 04:42:09,885 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:42:09,885 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:42:09,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:42:09,885 INFO L85 PathProgramCache]: Analyzing trace with hash 2118008102, now seen corresponding path program 21 times [2022-03-19 04:42:09,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:42:09,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [342197231] [2022-03-19 04:42:09,886 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:42:09,886 INFO L85 PathProgramCache]: Analyzing trace with hash 2118008102, now seen corresponding path program 22 times [2022-03-19 04:42:09,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:42:09,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201042577] [2022-03-19 04:42:09,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:42:09,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:42:09,894 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:42:09,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535734463] [2022-03-19 04:42:09,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:42:09,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:42:09,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:42:09,896 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:42:09,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 04:42:10,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:42:10,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:42:10,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-19 04:42:10,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:42:11,280 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:42:11,288 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:42:14,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 171 proven. 223 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2022-03-19 04:42:14,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:42:15,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 227 proven. 32 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked. [2022-03-19 04:42:15,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:42:15,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201042577] [2022-03-19 04:42:15,978 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:42:15,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535734463] [2022-03-19 04:42:15,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535734463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:42:15,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:42:15,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 26 [2022-03-19 04:42:15,979 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:42:15,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [342197231] [2022-03-19 04:42:15,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [342197231] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:42:15,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:42:15,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 04:42:15,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123223075] [2022-03-19 04:42:15,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:42:15,980 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 04:42:15,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:42:15,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 04:42:15,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-03-19 04:42:15,981 INFO L87 Difference]: Start difference. First operand 480 states and 624 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 11 states have call predecessors, (29), 11 states have call successors, (29) [2022-03-19 04:42:18,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:42:18,485 INFO L93 Difference]: Finished difference Result 520 states and 675 transitions. [2022-03-19 04:42:18,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 04:42:18,487 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 11 states have call predecessors, (29), 11 states have call successors, (29) Word has length 174 [2022-03-19 04:42:18,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:42:18,490 INFO L225 Difference]: With dead ends: 520 [2022-03-19 04:42:18,490 INFO L226 Difference]: Without dead ends: 518 [2022-03-19 04:42:18,491 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 321 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 04:42:18,491 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 38 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:42:18,491 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 790 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-19 04:42:18,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-03-19 04:42:18,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 513. [2022-03-19 04:42:18,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 283 states have (on average 1.11660777385159) internal successors, (316), 283 states have internal predecessors, (316), 177 states have call successors, (177), 54 states have call predecessors, (177), 52 states have return successors, (175), 175 states have call predecessors, (175), 175 states have call successors, (175) [2022-03-19 04:42:18,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 668 transitions. [2022-03-19 04:42:18,658 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 668 transitions. Word has length 174 [2022-03-19 04:42:18,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:42:18,658 INFO L478 AbstractCegarLoop]: Abstraction has 513 states and 668 transitions. [2022-03-19 04:42:18,658 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 11 states have call predecessors, (29), 11 states have call successors, (29) [2022-03-19 04:42:18,658 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 668 transitions. [2022-03-19 04:42:18,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-19 04:42:18,660 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:42:18,660 INFO L500 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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] [2022-03-19 04:42:18,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-19 04:42:18,875 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-19 04:42:18,875 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:42:18,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:42:18,876 INFO L85 PathProgramCache]: Analyzing trace with hash 774152475, now seen corresponding path program 23 times [2022-03-19 04:42:18,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:42:18,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2118786652] [2022-03-19 04:42:18,876 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:42:18,877 INFO L85 PathProgramCache]: Analyzing trace with hash 774152475, now seen corresponding path program 24 times [2022-03-19 04:42:18,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:42:18,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246791046] [2022-03-19 04:42:18,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:42:18,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:42:18,883 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:42:18,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531784218] [2022-03-19 04:42:18,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:42:18,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:42:18,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:42:18,885 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:42:18,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 04:42:19,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 04:42:19,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:42:19,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-19 04:42:19,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:42:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 129 proven. 57 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2022-03-19 04:42:21,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:42:24,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:42:24,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246791046] [2022-03-19 04:42:24,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:42:24,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531784218] [2022-03-19 04:42:24,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531784218] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:42:24,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:42:24,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-19 04:42:24,983 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:42:24,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2118786652] [2022-03-19 04:42:24,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2118786652] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:42:24,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:42:24,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 04:42:24,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246515385] [2022-03-19 04:42:24,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:42:24,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 04:42:24,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:42:24,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 04:42:24,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=386, Unknown=1, NotChecked=0, Total=506 [2022-03-19 04:42:24,985 INFO L87 Difference]: Start difference. First operand 513 states and 668 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2022-03-19 04:42:26,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:42:26,739 INFO L93 Difference]: Finished difference Result 572 states and 753 transitions. [2022-03-19 04:42:26,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 04:42:26,740 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 176 [2022-03-19 04:42:26,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:42:26,742 INFO L225 Difference]: With dead ends: 572 [2022-03-19 04:42:26,742 INFO L226 Difference]: Without dead ends: 570 [2022-03-19 04:42:26,743 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=154, Invalid=547, Unknown=1, NotChecked=0, Total=702 [2022-03-19 04:42:26,743 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 31 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-19 04:42:26,743 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 499 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-19 04:42:26,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-03-19 04:42:26,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 527. [2022-03-19 04:42:26,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 291 states have (on average 1.1168384879725086) internal successors, (325), 293 states have internal predecessors, (325), 183 states have call successors, (183), 54 states have call predecessors, (183), 52 states have return successors, (181), 179 states have call predecessors, (181), 181 states have call successors, (181) [2022-03-19 04:42:26,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 689 transitions. [2022-03-19 04:42:26,893 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 689 transitions. Word has length 176 [2022-03-19 04:42:26,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:42:26,893 INFO L478 AbstractCegarLoop]: Abstraction has 527 states and 689 transitions. [2022-03-19 04:42:26,893 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2022-03-19 04:42:26,893 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 689 transitions. [2022-03-19 04:42:26,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-19 04:42:26,895 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:42:26,895 INFO L500 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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] [2022-03-19 04:42:26,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-19 04:42:27,101 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:42:27,102 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:42:27,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:42:27,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1224554493, now seen corresponding path program 25 times [2022-03-19 04:42:27,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:42:27,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [832122626] [2022-03-19 04:42:27,103 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:42:27,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1224554493, now seen corresponding path program 26 times [2022-03-19 04:42:27,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:42:27,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861991363] [2022-03-19 04:42:27,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:42:27,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:42:27,110 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:42:27,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1334128756] [2022-03-19 04:42:27,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:42:27,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:42:27,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:42:27,112 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:42:27,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 04:42:27,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:42:27,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:42:27,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-19 04:42:27,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:42:30,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 211 proven. 122 refuted. 0 times theorem prover too weak. 877 trivial. 0 not checked. [2022-03-19 04:42:30,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:43:17,174 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse16 (* c_main_~s~0 c_main_~k~0)) (.cse17 (* (- 1) c_main_~q~0 c_main_~k~0))) (let ((.cse5 (+ (* (- 2) c_main_~p~0) c_main_~q~0 (* (- 2) .cse17))) (.cse4 (+ (* 2 .cse16) (* (- 2) c_main_~r~0) c_main_~s~0)) (.cse6 (+ c_main_~p~0 .cse17)) (.cse8 (+ c_main_~r~0 (* (- 1) .cse16)))) (let ((.cse9 (* .cse8 c_main_~y~0)) (.cse11 (* .cse6 c_main_~x~0)) (.cse2 (* .cse4 c_main_~y~0)) (.cse3 (* .cse5 c_main_~x~0))) (let ((.cse1 (+ .cse2 .cse3)) (.cse0 (+ .cse9 .cse11)) (.cse13 (* c_main_~p~0 c_main_~x~0)) (.cse12 (* c_main_~r~0 c_main_~y~0)) (.cse7 (* c_main_~q~0 c_main_~x~0)) (.cse10 (* c_main_~s~0 c_main_~y~0)) (.cse14 (* c_main_~q~0 c_main_~x~0 c_main_~k~0)) (.cse15 (* c_main_~s~0 c_main_~y~0 c_main_~k~0))) (or (not (= c_main_~c~0 .cse0)) (= .cse1 0) (= (+ .cse2 .cse3 (* .cse1 c_main_~y~0)) (+ .cse2 (* c_main_~yy~0 .cse4) .cse3 (* c_main_~xy~0 .cse5))) (not (= (+ (* (- 2) .cse6 c_main_~x~0) .cse7 (* (- 2) .cse8 c_main_~y~0) (* .cse9 2) .cse10 (* 2 .cse11)) c_main_~b~0)) (not (= (+ .cse9 (* c_main_~xy~0 .cse6) .cse11 (* c_main_~yy~0 .cse8)) (+ .cse9 (* .cse0 c_main_~y~0) .cse11))) (not (<= (+ (* 2 .cse12) (* 2 .cse13)) (+ .cse7 .cse10 (* 2 .cse14) (* 2 .cse15)))) (<= (+ (* 3 .cse13) (* 3 .cse12)) (+ .cse7 .cse10 (* .cse14 3) (* 3 .cse15)))))))) is different from true [2022-03-19 04:43:27,638 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse13 (* c_main_~r~0 c_main_~y~0)) (.cse12 (* c_main_~p~0 c_main_~x~0)) (.cse2 (* c_main_~q~0 c_main_~x~0)) (.cse3 (* c_main_~s~0 c_main_~y~0)) (.cse14 (* c_main_~q~0 c_main_~x~0 c_main_~k~0)) (.cse15 (* c_main_~s~0 c_main_~y~0 c_main_~k~0))) (let ((.cse1 (+ .cse2 .cse3 (* 2 .cse14) (* 2 .cse15))) (.cse0 (+ (* 2 .cse13) (* 2 .cse12))) (.cse7 (* c_main_~r~0 c_main_~y~0 c_main_~y~0)) (.cse6 (* c_main_~p~0 c_main_~x~0 c_main_~y~0)) (.cse4 (* c_main_~q~0 c_main_~xy~0 c_main_~k~0)) (.cse5 (* c_main_~yy~0 c_main_~s~0 c_main_~k~0)) (.cse11 (* c_main_~xy~0 c_main_~p~0)) (.cse9 (* c_main_~yy~0 c_main_~r~0)) (.cse8 (* c_main_~q~0 c_main_~x~0 c_main_~y~0 c_main_~k~0)) (.cse10 (* c_main_~s~0 c_main_~y~0 c_main_~y~0 c_main_~k~0))) (or (= .cse0 .cse1) (< .cse1 .cse0) (not (= c_main_~b~0 (+ .cse2 .cse3))) (not (= (+ .cse4 .cse5 .cse6 .cse7) (+ .cse8 .cse9 .cse10 .cse11))) (<= (+ (* 3 .cse12) (* 3 .cse13)) (+ .cse2 .cse3 (* .cse14 3) (* 3 .cse15))) (= (+ (* 2 .cse7) (* c_main_~q~0 c_main_~xy~0) (* c_main_~yy~0 c_main_~s~0) (* 2 .cse6) (* .cse4 2) (* .cse5 2)) (+ (* 2 .cse11) (* c_main_~q~0 c_main_~x~0 c_main_~y~0) (* .cse9 2) (* .cse8 2) (* 2 .cse10) (* c_main_~s~0 c_main_~y~0 c_main_~y~0))) (not (= (+ .cse12 .cse13) (+ .cse14 c_main_~c~0 .cse15)))))) is different from true [2022-03-19 04:43:57,223 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse17 (+ c_main_~k~0 1)) (.cse1 (* c_main_~r~0 c_main_~y~0)) (.cse0 (* c_main_~p~0 c_main_~x~0))) (let ((.cse3 (* c_main_~q~0 c_main_~x~0 c_main_~k~0)) (.cse5 (* c_main_~s~0 c_main_~y~0 c_main_~k~0)) (.cse16 (+ (* 2 .cse1) (* 2 .cse0))) (.cse4 (* c_main_~q~0 c_main_~x~0)) (.cse15 (* c_main_~s~0 c_main_~y~0 .cse17)) (.cse14 (* c_main_~q~0 c_main_~x~0 .cse17)) (.cse2 (* c_main_~s~0 c_main_~y~0)) (.cse9 (* c_main_~s~0 c_main_~y~0 c_main_~y~0 .cse17)) (.cse8 (* c_main_~yy~0 c_main_~r~0)) (.cse6 (* c_main_~q~0 c_main_~x~0 c_main_~y~0 .cse17)) (.cse7 (* c_main_~xy~0 c_main_~p~0)) (.cse11 (* c_main_~q~0 c_main_~xy~0 .cse17)) (.cse13 (* c_main_~yy~0 c_main_~s~0 .cse17)) (.cse12 (* c_main_~p~0 c_main_~x~0 c_main_~y~0)) (.cse10 (* c_main_~r~0 c_main_~y~0 c_main_~y~0))) (or (<= (+ (* 3 .cse0) (* 3 .cse1)) (+ (* .cse2 4) (* .cse3 3) (* .cse4 4) (* 3 .cse5))) (= (+ (* 2 .cse6) (* 2 .cse7) (* c_main_~q~0 c_main_~x~0 c_main_~y~0) (* .cse8 2) (* c_main_~s~0 c_main_~y~0 c_main_~y~0) (* .cse9 2)) (+ (* 2 .cse10) (* c_main_~q~0 c_main_~xy~0) (* .cse11 2) (* c_main_~yy~0 c_main_~s~0) (* 2 .cse12) (* .cse13 2))) (not (= (+ .cse14 (* (- 1) c_main_~b~0) c_main_~c~0 .cse15) (+ .cse0 .cse1))) (not (= c_main_~b~0 (+ .cse4 .cse2))) (< (+ (* .cse4 3) (* 3 .cse2) (* 2 .cse3) (* 2 .cse5)) .cse16) (= .cse16 (+ .cse4 (* 2 .cse15) (* .cse14 2) .cse2)) (not (= (+ .cse9 .cse8 .cse6 .cse7) (+ .cse11 .cse13 .cse12 .cse10)))))) is different from true [2022-03-19 04:45:07,216 WARN L232 SmtUtils]: Spent 7.66s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 04:45:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 213 proven. 52 refuted. 0 times theorem prover too weak. 892 trivial. 53 not checked. [2022-03-19 04:45:17,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:45:17,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861991363] [2022-03-19 04:45:17,209 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:45:17,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334128756] [2022-03-19 04:45:17,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334128756] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:45:17,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:45:17,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 36 [2022-03-19 04:45:17,209 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:45:17,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [832122626] [2022-03-19 04:45:17,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [832122626] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:45:17,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:45:17,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 04:45:17,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119579335] [2022-03-19 04:45:17,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:45:17,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 04:45:17,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:17,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 04:45:17,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=830, Unknown=5, NotChecked=192, Total=1260 [2022-03-19 04:45:17,211 INFO L87 Difference]: Start difference. First operand 527 states and 689 transitions. Second operand has 21 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 9 states have call predecessors, (30), 10 states have call successors, (30) [2022-03-19 04:45:20,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:45:20,544 INFO L93 Difference]: Finished difference Result 553 states and 710 transitions. [2022-03-19 04:45:20,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 04:45:20,545 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 9 states have call predecessors, (30), 10 states have call successors, (30) Word has length 176 [2022-03-19 04:45:20,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:45:20,547 INFO L225 Difference]: With dead ends: 553 [2022-03-19 04:45:20,547 INFO L226 Difference]: Without dead ends: 551 [2022-03-19 04:45:20,548 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 313 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 32.2s TimeCoverageRelationStatistics Valid=390, Invalid=1509, Unknown=5, NotChecked=258, Total=2162 [2022-03-19 04:45:20,548 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 60 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:45:20,549 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 690 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-19 04:45:20,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-03-19 04:45:20,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 503. [2022-03-19 04:45:20,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 281 states have (on average 1.113879003558719) internal successors, (313), 282 states have internal predecessors, (313), 168 states have call successors, (168), 55 states have call predecessors, (168), 53 states have return successors, (166), 165 states have call predecessors, (166), 166 states have call successors, (166) [2022-03-19 04:45:20,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 647 transitions. [2022-03-19 04:45:20,720 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 647 transitions. Word has length 176 [2022-03-19 04:45:20,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:45:20,720 INFO L478 AbstractCegarLoop]: Abstraction has 503 states and 647 transitions. [2022-03-19 04:45:20,720 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 9 states have call predecessors, (30), 10 states have call successors, (30) [2022-03-19 04:45:20,720 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 647 transitions. [2022-03-19 04:45:20,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-03-19 04:45:20,722 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:45:20,722 INFO L500 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:45:20,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-19 04:45:20,936 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:45:20,936 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:45:20,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:45:20,936 INFO L85 PathProgramCache]: Analyzing trace with hash 661049022, now seen corresponding path program 27 times [2022-03-19 04:45:20,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:45:20,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [745604685] [2022-03-19 04:45:20,937 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:45:20,937 INFO L85 PathProgramCache]: Analyzing trace with hash 661049022, now seen corresponding path program 28 times [2022-03-19 04:45:20,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:45:20,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344560859] [2022-03-19 04:45:20,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:45:20,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:45:20,943 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:45:20,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574139540] [2022-03-19 04:45:20,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:45:20,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:45:20,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:45:20,945 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) [2022-03-19 04:45:20,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 04:45:21,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:45:21,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:45:21,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 115 conjunts are in the unsatisfiable core [2022-03-19 04:45:21,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:45:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 219 proven. 263 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2022-03-19 04:45:24,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:45:32,230 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse4 (+ c_main_~p~0 (* (- 1) c_main_~q~0 c_main_~k~0))) (.cse5 (+ c_main_~r~0 (* (- 1) (* c_main_~s~0 c_main_~k~0))))) (let ((.cse2 (* c_main_~q~0 c_main_~x~0)) (.cse3 (* c_main_~s~0 c_main_~y~0)) (.cse0 (* .cse5 c_main_~y~0)) (.cse1 (* .cse4 c_main_~x~0))) (or (not (= c_main_~c~0 (+ .cse0 .cse1))) (not (= (+ .cse2 .cse3 (* c_main_~b~0 c_main_~y~0)) (+ (* c_main_~q~0 c_main_~xy~0) (* c_main_~yy~0 c_main_~s~0) c_main_~b~0))) (<= c_main_~b~0 c_main_~c~0) (not (= c_main_~b~0 (+ .cse2 .cse3))) (= (+ .cse0 .cse1 (* c_main_~c~0 c_main_~y~0)) (+ (* c_main_~xy~0 .cse4) c_main_~c~0 (* c_main_~yy~0 .cse5)))))) is different from true [2022-03-19 04:45:36,461 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:46:25,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:25,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344560859] [2022-03-19 04:46:25,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:25,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574139540] [2022-03-19 04:46:25,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574139540] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:46:25,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:46:25,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-03-19 04:46:25,047 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:25,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [745604685] [2022-03-19 04:46:25,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [745604685] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:25,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:25,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 04:46:25,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424715168] [2022-03-19 04:46:25,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:25,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 04:46:25,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:25,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 04:46:25,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=619, Unknown=10, NotChecked=54, Total=870 [2022-03-19 04:46:25,048 INFO L87 Difference]: Start difference. First operand 503 states and 647 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 9 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-03-19 04:46:28,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:28,463 INFO L93 Difference]: Finished difference Result 517 states and 659 transitions. [2022-03-19 04:46:28,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 04:46:28,464 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 9 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 179 [2022-03-19 04:46:28,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:28,466 INFO L225 Difference]: With dead ends: 517 [2022-03-19 04:46:28,466 INFO L226 Difference]: Without dead ends: 515 [2022-03-19 04:46:28,467 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 218 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=325, Invalid=1229, Unknown=10, NotChecked=76, Total=1640 [2022-03-19 04:46:28,467 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 37 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:28,467 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 786 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-19 04:46:28,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-03-19 04:46:28,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 511. [2022-03-19 04:46:28,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 287 states have (on average 1.1114982578397212) internal successors, (319), 288 states have internal predecessors, (319), 168 states have call successors, (168), 57 states have call predecessors, (168), 55 states have return successors, (166), 165 states have call predecessors, (166), 166 states have call successors, (166) [2022-03-19 04:46:28,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 653 transitions. [2022-03-19 04:46:28,606 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 653 transitions. Word has length 179 [2022-03-19 04:46:28,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:28,606 INFO L478 AbstractCegarLoop]: Abstraction has 511 states and 653 transitions. [2022-03-19 04:46:28,606 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 9 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-03-19 04:46:28,606 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 653 transitions. [2022-03-19 04:46:28,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-03-19 04:46:28,608 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:28,608 INFO L500 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 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] [2022-03-19 04:46:28,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:28,818 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 [2022-03-19 04:46:28,819 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:28,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:28,819 INFO L85 PathProgramCache]: Analyzing trace with hash 2078525035, now seen corresponding path program 17 times [2022-03-19 04:46:28,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:28,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1977964754] [2022-03-19 04:46:28,820 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:28,820 INFO L85 PathProgramCache]: Analyzing trace with hash 2078525035, now seen corresponding path program 18 times [2022-03-19 04:46:28,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:28,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410776853] [2022-03-19 04:46:28,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:28,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:28,826 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:28,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617893] [2022-03-19 04:46:28,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:46:28,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:28,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:28,827 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) [2022-03-19 04:46:28,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 04:46:28,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 04:46:28,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:28,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-19 04:46:28,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 107 proven. 63 refuted. 0 times theorem prover too weak. 1139 trivial. 0 not checked. [2022-03-19 04:46:29,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:29,964 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:46:30,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:30,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410776853] [2022-03-19 04:46:30,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:30,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617893] [2022-03-19 04:46:30,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617893] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:46:30,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:46:30,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-19 04:46:30,055 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:30,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1977964754] [2022-03-19 04:46:30,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1977964754] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:30,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:30,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 04:46:30,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445511422] [2022-03-19 04:46:30,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:30,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 04:46:30,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:30,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 04:46:30,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-19 04:46:30,056 INFO L87 Difference]: Start difference. First operand 511 states and 653 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-19 04:46:30,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:30,582 INFO L93 Difference]: Finished difference Result 553 states and 705 transitions. [2022-03-19 04:46:30,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 04:46:30,582 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 182 [2022-03-19 04:46:30,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:30,585 INFO L225 Difference]: With dead ends: 553 [2022-03-19 04:46:30,585 INFO L226 Difference]: Without dead ends: 550 [2022-03-19 04:46:30,585 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-03-19 04:46:30,586 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 29 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:30,586 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 303 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:46:30,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-03-19 04:46:30,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 497. [2022-03-19 04:46:30,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 280 states have (on average 1.1035714285714286) internal successors, (309), 281 states have internal predecessors, (309), 161 states have call successors, (161), 57 states have call predecessors, (161), 55 states have return successors, (159), 158 states have call predecessors, (159), 159 states have call successors, (159) [2022-03-19 04:46:30,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 629 transitions. [2022-03-19 04:46:30,721 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 629 transitions. Word has length 182 [2022-03-19 04:46:30,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:30,722 INFO L478 AbstractCegarLoop]: Abstraction has 497 states and 629 transitions. [2022-03-19 04:46:30,722 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-19 04:46:30,722 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 629 transitions. [2022-03-19 04:46:30,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-03-19 04:46:30,724 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:30,724 INFO L500 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 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] [2022-03-19 04:46:30,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:30,929 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 [2022-03-19 04:46:30,929 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:30,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:30,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1363924019, now seen corresponding path program 19 times [2022-03-19 04:46:30,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:30,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [899094343] [2022-03-19 04:46:30,930 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:30,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1363924019, now seen corresponding path program 20 times [2022-03-19 04:46:30,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:30,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135060159] [2022-03-19 04:46:30,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:30,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:30,940 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:30,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669361908] [2022-03-19 04:46:30,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:46:30,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:30,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:30,942 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) [2022-03-19 04:46:30,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 04:46:31,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:46:31,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:31,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-19 04:46:31,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:31,343 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:46:31,344 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:46:32,875 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:46:32,878 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:46:32,882 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:46:33,009 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:46:33,013 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:46:33,031 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:46:33,048 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:46:34,071 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:46:34,091 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:46:34,320 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:46:34,766 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:46:35,137 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:46:35,304 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:46:35,610 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:46:35,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 220 proven. 210 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2022-03-19 04:46:35,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:46:38,218 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:46:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 250 proven. 12 refuted. 0 times theorem prover too weak. 1047 trivial. 0 not checked. [2022-03-19 04:46:38,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:46:38,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135060159] [2022-03-19 04:46:38,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:46:38,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669361908] [2022-03-19 04:46:38,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669361908] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:46:38,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:46:38,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 26 [2022-03-19 04:46:38,468 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:46:38,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [899094343] [2022-03-19 04:46:38,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [899094343] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:46:38,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:46:38,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 04:46:38,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044835860] [2022-03-19 04:46:38,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:46:38,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 04:46:38,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:38,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 04:46:38,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-03-19 04:46:38,469 INFO L87 Difference]: Start difference. First operand 497 states and 629 transitions. Second operand has 20 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 13 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 12 states have call successors, (31) [2022-03-19 04:46:39,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:46:39,960 INFO L93 Difference]: Finished difference Result 516 states and 653 transitions. [2022-03-19 04:46:39,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 04:46:39,960 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 13 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 12 states have call successors, (31) Word has length 182 [2022-03-19 04:46:39,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:46:39,963 INFO L225 Difference]: With dead ends: 516 [2022-03-19 04:46:39,963 INFO L226 Difference]: Without dead ends: 509 [2022-03-19 04:46:39,963 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2022-03-19 04:46:39,963 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 35 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 04:46:39,963 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 658 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 687 Invalid, 0 Unknown, 123 Unchecked, 0.9s Time] [2022-03-19 04:46:39,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-03-19 04:46:40,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 503. [2022-03-19 04:46:40,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 282 states have (on average 1.1063829787234043) internal successors, (312), 283 states have internal predecessors, (312), 165 states have call successors, (165), 57 states have call predecessors, (165), 55 states have return successors, (163), 162 states have call predecessors, (163), 163 states have call successors, (163) [2022-03-19 04:46:40,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 640 transitions. [2022-03-19 04:46:40,101 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 640 transitions. Word has length 182 [2022-03-19 04:46:40,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:46:40,101 INFO L478 AbstractCegarLoop]: Abstraction has 503 states and 640 transitions. [2022-03-19 04:46:40,101 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 13 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 12 states have call successors, (31) [2022-03-19 04:46:40,101 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 640 transitions. [2022-03-19 04:46:40,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-03-19 04:46:40,103 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:46:40,103 INFO L500 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 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] [2022-03-19 04:46:40,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-19 04:46:40,319 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 [2022-03-19 04:46:40,319 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:46:40,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:46:40,320 INFO L85 PathProgramCache]: Analyzing trace with hash -804600145, now seen corresponding path program 21 times [2022-03-19 04:46:40,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:46:40,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1467886142] [2022-03-19 04:46:40,320 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:46:40,320 INFO L85 PathProgramCache]: Analyzing trace with hash -804600145, now seen corresponding path program 22 times [2022-03-19 04:46:40,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:46:40,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848209980] [2022-03-19 04:46:40,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:46:40,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:46:40,327 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:46:40,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328480469] [2022-03-19 04:46:40,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:46:40,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:46:40,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:46:40,329 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) [2022-03-19 04:46:40,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-19 04:46:40,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:46:40,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:46:40,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 112 conjunts are in the unsatisfiable core [2022-03-19 04:46:40,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:46:41,595 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:49:13,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 250 proven. 294 refuted. 0 times theorem prover too weak. 765 trivial. 0 not checked. [2022-03-19 04:49:13,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 293 proven. 21 refuted. 0 times theorem prover too weak. 995 trivial. 0 not checked. [2022-03-19 04:49:20,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:20,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848209980] [2022-03-19 04:49:20,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:20,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328480469] [2022-03-19 04:49:20,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328480469] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:20,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:20,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15] total 34 [2022-03-19 04:49:20,559 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:20,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1467886142] [2022-03-19 04:49:20,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1467886142] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:20,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:20,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 04:49:20,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358531299] [2022-03-19 04:49:20,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:20,560 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 04:49:20,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:20,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 04:49:20,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 04:49:20,560 INFO L87 Difference]: Start difference. First operand 503 states and 640 transitions. Second operand has 24 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 12 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) [2022-03-19 04:49:39,820 WARN L232 SmtUtils]: Spent 8.91s on a formula simplification. DAG size of input: 55 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 04:49:41,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:41,410 INFO L93 Difference]: Finished difference Result 607 states and 769 transitions. [2022-03-19 04:49:41,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 04:49:41,411 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 12 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) Word has length 182 [2022-03-19 04:49:41,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:41,413 INFO L225 Difference]: With dead ends: 607 [2022-03-19 04:49:41,413 INFO L226 Difference]: Without dead ends: 556 [2022-03-19 04:49:41,414 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 326 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 04:49:41,414 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 49 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:41,414 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 814 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-03-19 04:49:41,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-03-19 04:49:41,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 554. [2022-03-19 04:49:41,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 311 states have (on average 1.1028938906752412) internal successors, (343), 312 states have internal predecessors, (343), 181 states have call successors, (181), 63 states have call predecessors, (181), 61 states have return successors, (179), 178 states have call predecessors, (179), 179 states have call successors, (179) [2022-03-19 04:49:41,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 703 transitions. [2022-03-19 04:49:41,570 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 703 transitions. Word has length 182 [2022-03-19 04:49:41,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:41,570 INFO L478 AbstractCegarLoop]: Abstraction has 554 states and 703 transitions. [2022-03-19 04:49:41,571 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 12 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) [2022-03-19 04:49:41,571 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 703 transitions. [2022-03-19 04:49:41,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-19 04:49:41,573 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:41,573 INFO L500 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 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, 1, 1, 1] [2022-03-19 04:49:41,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:41,787 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 [2022-03-19 04:49:41,787 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:41,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:41,788 INFO L85 PathProgramCache]: Analyzing trace with hash 581430734, now seen corresponding path program 23 times [2022-03-19 04:49:41,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:41,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1101986882] [2022-03-19 04:49:41,788 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:41,788 INFO L85 PathProgramCache]: Analyzing trace with hash 581430734, now seen corresponding path program 24 times [2022-03-19 04:49:41,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:41,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311286459] [2022-03-19 04:49:41,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:41,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:41,794 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:41,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426244758] [2022-03-19 04:49:41,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:49:41,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:41,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:41,796 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) [2022-03-19 04:49:41,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-19 04:49:42,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 04:49:42,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:42,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 04:49:42,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:43,306 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:49:45,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 216 proven. 68 refuted. 0 times theorem prover too weak. 1033 trivial. 0 not checked. [2022-03-19 04:49:45,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:46,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:46,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311286459] [2022-03-19 04:49:46,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:46,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426244758] [2022-03-19 04:49:46,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426244758] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:49:46,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:49:46,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-19 04:49:46,479 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:46,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1101986882] [2022-03-19 04:49:46,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1101986882] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:46,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:46,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 04:49:46,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326562350] [2022-03-19 04:49:46,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:46,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 04:49:46,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:46,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 04:49:46,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-03-19 04:49:46,481 INFO L87 Difference]: Start difference. First operand 554 states and 703 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-03-19 04:49:49,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:49,476 INFO L93 Difference]: Finished difference Result 637 states and 822 transitions. [2022-03-19 04:49:49,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 04:49:49,477 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 185 [2022-03-19 04:49:49,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:49,479 INFO L225 Difference]: With dead ends: 637 [2022-03-19 04:49:49,479 INFO L226 Difference]: Without dead ends: 630 [2022-03-19 04:49:49,479 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=104, Invalid=597, Unknown=1, NotChecked=0, Total=702 [2022-03-19 04:49:49,480 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 27 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:49,480 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 371 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 481 Invalid, 0 Unknown, 92 Unchecked, 0.7s Time] [2022-03-19 04:49:49,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-03-19 04:49:49,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 622. [2022-03-19 04:49:49,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 342 states have (on average 1.1169590643274854) internal successors, (382), 343 states have internal predecessors, (382), 213 states have call successors, (213), 68 states have call predecessors, (213), 66 states have return successors, (211), 210 states have call predecessors, (211), 211 states have call successors, (211) [2022-03-19 04:49:49,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 806 transitions. [2022-03-19 04:49:49,655 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 806 transitions. Word has length 185 [2022-03-19 04:49:49,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:49,656 INFO L478 AbstractCegarLoop]: Abstraction has 622 states and 806 transitions. [2022-03-19 04:49:49,656 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-03-19 04:49:49,656 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 806 transitions. [2022-03-19 04:49:49,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-19 04:49:49,658 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:49,658 INFO L500 BasicCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:49:49,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-19 04:49:49,864 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 [2022-03-19 04:49:49,864 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:49,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:49,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1344592104, now seen corresponding path program 29 times [2022-03-19 04:49:49,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:49,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2098710769] [2022-03-19 04:49:49,865 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:49,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1344592104, now seen corresponding path program 30 times [2022-03-19 04:49:49,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:49,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361568811] [2022-03-19 04:49:49,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:49,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:49,873 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:49,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009105131] [2022-03-19 04:49:49,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:49:49,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:49,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:49,875 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) [2022-03-19 04:49:49,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-19 04:49:49,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 04:49:49,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:49,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-19 04:49:50,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:51,337 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:49:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1533 backedges. 111 proven. 137 refuted. 0 times theorem prover too weak. 1285 trivial. 0 not checked. [2022-03-19 04:49:51,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1533 backedges. 111 proven. 137 refuted. 0 times theorem prover too weak. 1285 trivial. 0 not checked. [2022-03-19 04:49:56,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:56,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361568811] [2022-03-19 04:49:56,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:56,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009105131] [2022-03-19 04:49:56,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009105131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:56,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:56,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 32 [2022-03-19 04:49:56,166 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:56,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2098710769] [2022-03-19 04:49:56,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2098710769] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:56,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:56,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 04:49:56,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298927532] [2022-03-19 04:49:56,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:56,166 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 04:49:56,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:56,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 04:49:56,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2022-03-19 04:49:56,167 INFO L87 Difference]: Start difference. First operand 622 states and 806 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 17 states have internal predecessors, (38), 10 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 9 states have call predecessors, (33), 10 states have call successors, (33) [2022-03-19 04:50:00,337 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 04:50:01,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:01,312 INFO L93 Difference]: Finished difference Result 668 states and 868 transitions. [2022-03-19 04:50:01,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 04:50:01,313 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 17 states have internal predecessors, (38), 10 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 9 states have call predecessors, (33), 10 states have call successors, (33) Word has length 193 [2022-03-19 04:50:01,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:01,315 INFO L225 Difference]: With dead ends: 668 [2022-03-19 04:50:01,315 INFO L226 Difference]: Without dead ends: 666 [2022-03-19 04:50:01,316 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 353 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=268, Invalid=1138, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 04:50:01,316 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 39 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:01,316 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 767 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1009 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2022-03-19 04:50:01,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-03-19 04:50:01,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 661. [2022-03-19 04:50:01,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 362 states have (on average 1.1187845303867403) internal successors, (405), 363 states have internal predecessors, (405), 229 states have call successors, (229), 71 states have call predecessors, (229), 69 states have return successors, (227), 226 states have call predecessors, (227), 227 states have call successors, (227) [2022-03-19 04:50:01,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 861 transitions. [2022-03-19 04:50:01,528 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 861 transitions. Word has length 193 [2022-03-19 04:50:01,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:01,529 INFO L478 AbstractCegarLoop]: Abstraction has 661 states and 861 transitions. [2022-03-19 04:50:01,529 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 17 states have internal predecessors, (38), 10 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 9 states have call predecessors, (33), 10 states have call successors, (33) [2022-03-19 04:50:01,529 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 861 transitions. [2022-03-19 04:50:01,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-03-19 04:50:01,531 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:01,531 INFO L500 BasicCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:01,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:01,755 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 [2022-03-19 04:50:01,755 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:01,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:01,756 INFO L85 PathProgramCache]: Analyzing trace with hash 787625881, now seen corresponding path program 31 times [2022-03-19 04:50:01,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:01,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1621810051] [2022-03-19 04:50:01,756 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:01,756 INFO L85 PathProgramCache]: Analyzing trace with hash 787625881, now seen corresponding path program 32 times [2022-03-19 04:50:01,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:01,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624604036] [2022-03-19 04:50:01,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:01,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:01,762 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:01,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472007585] [2022-03-19 04:50:01,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:50:01,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:01,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:01,764 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) [2022-03-19 04:50:01,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-19 04:50:01,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:50:01,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:01,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 108 conjunts are in the unsatisfiable core [2022-03-19 04:50:01,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 370 proven. 277 refuted. 0 times theorem prover too weak. 993 trivial. 0 not checked. [2022-03-19 04:50:04,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 255 proven. 137 refuted. 0 times theorem prover too weak. 1248 trivial. 0 not checked. [2022-03-19 04:50:46,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:46,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624604036] [2022-03-19 04:50:46,896 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:46,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472007585] [2022-03-19 04:50:46,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472007585] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:46,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:46,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 33 [2022-03-19 04:50:46,896 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:46,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1621810051] [2022-03-19 04:50:46,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1621810051] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:46,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:46,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 04:50:46,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132450169] [2022-03-19 04:50:46,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:46,897 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 04:50:46,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:46,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 04:50:46,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=830, Unknown=1, NotChecked=0, Total=1056 [2022-03-19 04:50:46,898 INFO L87 Difference]: Start difference. First operand 661 states and 861 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 12 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 11 states have call predecessors, (34), 12 states have call successors, (34) [2022-03-19 04:50:48,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:48,930 INFO L93 Difference]: Finished difference Result 721 states and 940 transitions. [2022-03-19 04:50:48,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 04:50:48,930 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 12 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 11 states have call predecessors, (34), 12 states have call successors, (34) Word has length 195 [2022-03-19 04:50:48,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:48,933 INFO L225 Difference]: With dead ends: 721 [2022-03-19 04:50:48,933 INFO L226 Difference]: Without dead ends: 719 [2022-03-19 04:50:48,933 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 347 SyntacticMatches, 11 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=261, Invalid=1070, Unknown=1, NotChecked=0, Total=1332 [2022-03-19 04:50:48,934 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 54 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:48,934 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 395 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-19 04:50:48,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-03-19 04:50:49,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 671. [2022-03-19 04:50:49,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 367 states have (on average 1.119891008174387) internal successors, (411), 368 states have internal predecessors, (411), 233 states have call successors, (233), 72 states have call predecessors, (233), 70 states have return successors, (231), 230 states have call predecessors, (231), 231 states have call successors, (231) [2022-03-19 04:50:49,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 875 transitions. [2022-03-19 04:50:49,113 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 875 transitions. Word has length 195 [2022-03-19 04:50:49,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:49,113 INFO L478 AbstractCegarLoop]: Abstraction has 671 states and 875 transitions. [2022-03-19 04:50:49,113 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 12 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 11 states have call predecessors, (34), 12 states have call successors, (34) [2022-03-19 04:50:49,114 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 875 transitions. [2022-03-19 04:50:49,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-03-19 04:50:49,115 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:49,116 INFO L500 BasicCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 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, 1] [2022-03-19 04:50:49,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:49,333 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 [2022-03-19 04:50:49,333 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:49,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:49,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1655342009, now seen corresponding path program 33 times [2022-03-19 04:50:49,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:49,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [818863193] [2022-03-19 04:50:49,334 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:49,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1655342009, now seen corresponding path program 34 times [2022-03-19 04:50:49,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:49,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890579417] [2022-03-19 04:50:49,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:49,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:49,340 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:49,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334163725] [2022-03-19 04:50:49,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:50:49,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:49,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:49,342 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) [2022-03-19 04:50:49,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-19 04:50:49,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:50:49,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:49,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 129 conjunts are in the unsatisfiable core [2022-03-19 04:50:49,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:53,506 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:50:53,519 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:50:53,523 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:50:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 247 proven. 408 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-03-19 04:50:56,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:59,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 347 proven. 46 refuted. 0 times theorem prover too weak. 1148 trivial. 0 not checked. [2022-03-19 04:50:59,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:59,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890579417] [2022-03-19 04:50:59,477 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:59,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334163725] [2022-03-19 04:50:59,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334163725] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:59,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:59,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 11] total 33 [2022-03-19 04:50:59,477 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:59,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [818863193] [2022-03-19 04:50:59,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [818863193] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:59,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:59,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-19 04:50:59,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78806965] [2022-03-19 04:50:59,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:59,478 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 04:50:59,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:59,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 04:50:59,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 04:50:59,479 INFO L87 Difference]: Start difference. First operand 671 states and 875 transitions. Second operand has 26 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 20 states have internal predecessors, (44), 13 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 14 states have call predecessors, (33), 13 states have call successors, (33) [2022-03-19 04:51:04,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:51:04,582 INFO L93 Difference]: Finished difference Result 716 states and 937 transitions. [2022-03-19 04:51:04,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 04:51:04,583 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 20 states have internal predecessors, (44), 13 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 14 states have call predecessors, (33), 13 states have call successors, (33) Word has length 196 [2022-03-19 04:51:04,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:51:04,586 INFO L225 Difference]: With dead ends: 716 [2022-03-19 04:51:04,586 INFO L226 Difference]: Without dead ends: 714 [2022-03-19 04:51:04,586 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 356 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 04:51:04,587 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 60 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-03-19 04:51:04,587 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 830 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1261 Invalid, 0 Unknown, 43 Unchecked, 4.4s Time] [2022-03-19 04:51:04,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-03-19 04:51:04,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 671. [2022-03-19 04:51:04,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 367 states have (on average 1.119891008174387) internal successors, (411), 368 states have internal predecessors, (411), 233 states have call successors, (233), 72 states have call predecessors, (233), 70 states have return successors, (231), 230 states have call predecessors, (231), 231 states have call successors, (231) [2022-03-19 04:51:04,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 875 transitions. [2022-03-19 04:51:04,861 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 875 transitions. Word has length 196 [2022-03-19 04:51:04,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:51:04,862 INFO L478 AbstractCegarLoop]: Abstraction has 671 states and 875 transitions. [2022-03-19 04:51:04,862 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 20 states have internal predecessors, (44), 13 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 14 states have call predecessors, (33), 13 states have call successors, (33) [2022-03-19 04:51:04,862 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 875 transitions. [2022-03-19 04:51:04,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-03-19 04:51:04,864 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:51:04,864 INFO L500 BasicCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 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, 1] [2022-03-19 04:51:04,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-19 04:51:05,077 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 [2022-03-19 04:51:05,077 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:51:05,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:51:05,077 INFO L85 PathProgramCache]: Analyzing trace with hash -908928347, now seen corresponding path program 35 times [2022-03-19 04:51:05,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:51:05,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [654854064] [2022-03-19 04:51:05,078 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:51:05,078 INFO L85 PathProgramCache]: Analyzing trace with hash -908928347, now seen corresponding path program 36 times [2022-03-19 04:51:05,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:51:05,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201273322] [2022-03-19 04:51:05,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:51:05,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:51:05,084 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:51:05,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286642310] [2022-03-19 04:51:05,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:51:05,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:51:05,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:51:05,086 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) [2022-03-19 04:51:05,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-19 04:51:05,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-19 04:51:05,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:51:05,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-19 04:51:05,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:51:07,196 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:51:08,038 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:51:08,168 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:51:13,266 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:51:20,562 WARN L232 SmtUtils]: Spent 6.52s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 04:51:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 191 proven. 131 refuted. 0 times theorem prover too weak. 1219 trivial. 0 not checked. [2022-03-19 04:51:26,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:51:35,679 WARN L855 $PredicateComparison]: unable to prove that (forall ((main_~k~0 Int)) (let ((.cse0 (* c_main_~s~0 main_~k~0)) (.cse1 (* (- 1) c_main_~q~0 main_~k~0))) (let ((.cse9 (+ c_main_~p~0 .cse1)) (.cse8 (+ (* (- 1) .cse0) c_main_~r~0))) (let ((.cse7 (* c_main_~r~0 c_main_~y~0)) (.cse6 (* c_main_~p~0 c_main_~x~0)) (.cse5 (* c_main_~q~0 main_~k~0 c_main_~x~0)) (.cse4 (* c_main_~s~0 main_~k~0 c_main_~y~0)) (.cse2 (* .cse8 c_main_~y~0)) (.cse3 (* .cse9 c_main_~x~0))) (or (= (+ (* (+ c_main_~s~0 .cse0 (* (- 1) c_main_~r~0)) c_main_~y~0) (* (+ c_main_~q~0 (* (- 1) c_main_~p~0) (* (- 1) .cse1)) c_main_~x~0)) (+ c_main_~b~0 (* .cse2 (- 1)) (* (- 1) .cse3))) (<= (+ .cse4 c_main_~b~0 .cse5) (+ .cse6 .cse7)) (<= (+ (* 2 .cse7) (* 2 .cse6)) (+ c_main_~b~0 (* 2 .cse5) (* .cse4 2))) (not (= (+ .cse2 (* c_main_~yy~0 .cse8) .cse3 (* c_main_~xy~0 .cse9)) (+ .cse2 .cse3 (* (+ .cse2 .cse3) c_main_~y~0))))))))) is different from true [2022-03-19 04:51:36,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:51:36,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201273322] [2022-03-19 04:51:36,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:51:36,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286642310] [2022-03-19 04:51:36,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286642310] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:51:36,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:51:36,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-03-19 04:51:36,039 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:51:36,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [654854064] [2022-03-19 04:51:36,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [654854064] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:51:36,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:51:36,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 04:51:36,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745921913] [2022-03-19 04:51:36,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:51:36,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 04:51:36,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:51:36,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 04:51:36,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=794, Unknown=2, NotChecked=58, Total=992 [2022-03-19 04:51:36,041 INFO L87 Difference]: Start difference. First operand 671 states and 875 transitions. Second operand has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 10 states have call predecessors, (25), 8 states have call successors, (25) [2022-03-19 04:51:52,202 WARN L232 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 54 DAG size of output: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 04:51:52,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:51:52,879 INFO L93 Difference]: Finished difference Result 746 states and 977 transitions. [2022-03-19 04:51:52,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 04:51:52,880 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 10 states have call predecessors, (25), 8 states have call successors, (25) Word has length 196 [2022-03-19 04:51:52,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:51:52,883 INFO L225 Difference]: With dead ends: 746 [2022-03-19 04:51:52,883 INFO L226 Difference]: Without dead ends: 744 [2022-03-19 04:51:52,883 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=4, NotChecked=76, Total=1640 [2022-03-19 04:51:52,884 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 39 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-19 04:51:52,884 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 704 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 660 Invalid, 0 Unknown, 271 Unchecked, 3.5s Time] [2022-03-19 04:51:52,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-03-19 04:51:53,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 713. [2022-03-19 04:51:53,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 393 states have (on average 1.1145038167938932) internal successors, (438), 395 states have internal predecessors, (438), 244 states have call successors, (244), 77 states have call predecessors, (244), 75 states have return successors, (242), 240 states have call predecessors, (242), 242 states have call successors, (242) [2022-03-19 04:51:53,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 924 transitions. [2022-03-19 04:51:53,113 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 924 transitions. Word has length 196 [2022-03-19 04:51:53,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:51:53,113 INFO L478 AbstractCegarLoop]: Abstraction has 713 states and 924 transitions. [2022-03-19 04:51:53,113 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 10 states have call predecessors, (25), 8 states have call successors, (25) [2022-03-19 04:51:53,114 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 924 transitions. [2022-03-19 04:51:53,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-03-19 04:51:53,115 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:51:53,116 INFO L500 BasicCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 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, 1] [2022-03-19 04:51:53,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-19 04:51:53,322 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 [2022-03-19 04:51:53,322 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:51:53,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:51:53,322 INFO L85 PathProgramCache]: Analyzing trace with hash -947049337, now seen corresponding path program 37 times [2022-03-19 04:51:53,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:51:53,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1102199297] [2022-03-19 04:51:53,323 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:51:53,323 INFO L85 PathProgramCache]: Analyzing trace with hash -947049337, now seen corresponding path program 38 times [2022-03-19 04:51:53,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:51:53,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389514235] [2022-03-19 04:51:53,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:51:53,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:51:53,329 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:51:53,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092366404] [2022-03-19 04:51:53,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:51:53,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:51:53,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:51:53,331 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) [2022-03-19 04:51:53,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-19 04:51:53,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:51:53,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:51:53,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-19 04:51:53,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:51:59,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 117 proven. 139 refuted. 0 times theorem prover too weak. 1285 trivial. 0 not checked. [2022-03-19 04:51:59,492 INFO L328 TraceCheckSpWp]: Computing backward predicates...