/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/count_by_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 02:35:43,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 02:35:43,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 02:35:43,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 02:35:43,740 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-31 02:35:43,757 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 02:35:43,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 02:35:43,758 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-31 02:35:43,758 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-31 02:35:43,759 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-31 02:35:43,759 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-31 02:35:43,759 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-31 02:35:43,759 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-31 02:35:43,760 INFO L138 SettingsManager]: * Use SBE=true [2022-01-31 02:35:43,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 02:35:43,760 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 02:35:43,760 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 02:35:43,760 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 02:35:43,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 02:35:43,760 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 02:35:43,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 02:35:43,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 02:35:43,761 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 02:35:43,761 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 02:35:43,761 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 02:35:43,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 02:35:43,761 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 02:35:43,761 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 02:35:43,761 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 02:35:43,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 02:35:43,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 02:35:43,762 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-31 02:35:43,762 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-31 02:35:43,762 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 02:35:43,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-31 02:35:43,762 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-31 02:35:43,762 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-31 02:35:43,763 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 02:35:43,763 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 02:35:44,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 02:35:44,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 02:35:44,033 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 02:35:44,034 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 02:35:44,034 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 02:35:44,035 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_2.i [2022-01-31 02:35:44,111 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5e61fd7a/e7b2897413bf491d809fb3d31557ace2/FLAG17adb8b1a [2022-01-31 02:35:44,541 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 02:35:44,542 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_2.i [2022-01-31 02:35:44,550 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5e61fd7a/e7b2897413bf491d809fb3d31557ace2/FLAG17adb8b1a [2022-01-31 02:35:44,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5e61fd7a/e7b2897413bf491d809fb3d31557ace2 [2022-01-31 02:35:44,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 02:35:44,577 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 02:35:44,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 02:35:44,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 02:35:44,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 02:35:44,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:35:44" (1/1) ... [2022-01-31 02:35:44,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26e31208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:35:44, skipping insertion in model container [2022-01-31 02:35:44,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:35:44" (1/1) ... [2022-01-31 02:35:44,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 02:35:44,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 02:35:44,772 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_2.i[891,904] [2022-01-31 02:35:44,779 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 02:35:44,785 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 02:35:44,794 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_2.i[891,904] [2022-01-31 02:35:44,797 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 02:35:44,807 INFO L208 MainTranslator]: Completed translation [2022-01-31 02:35:44,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:35:44 WrapperNode [2022-01-31 02:35:44,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 02:35:44,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 02:35:44,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 02:35:44,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 02:35:44,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:35:44" (1/1) ... [2022-01-31 02:35:44,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:35:44" (1/1) ... [2022-01-31 02:35:44,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:35:44" (1/1) ... [2022-01-31 02:35:44,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:35:44" (1/1) ... [2022-01-31 02:35:44,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:35:44" (1/1) ... [2022-01-31 02:35:44,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:35:44" (1/1) ... [2022-01-31 02:35:44,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:35:44" (1/1) ... [2022-01-31 02:35:44,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 02:35:44,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 02:35:44,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 02:35:44,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 02:35:44,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:35:44" (1/1) ... [2022-01-31 02:35:44,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 02:35:44,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:35:44,857 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) [2022-01-31 02:35:44,875 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 [2022-01-31 02:35:44,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 02:35:44,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 02:35:44,890 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 02:35:44,890 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 02:35:44,891 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 02:35:44,892 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 02:35:44,892 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 02:35:44,892 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 02:35:44,892 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 02:35:44,892 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 02:35:44,892 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 02:35:44,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 02:35:44,892 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 02:35:44,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 02:35:44,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 02:35:44,892 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 02:35:44,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 02:35:44,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 02:35:44,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 02:35:44,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 02:35:44,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 02:35:44,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 02:35:44,942 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 02:35:44,944 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 02:35:45,027 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 02:35:45,031 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 02:35:45,031 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 02:35:45,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:35:45 BoogieIcfgContainer [2022-01-31 02:35:45,032 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 02:35:45,033 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 02:35:45,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 02:35:45,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 02:35:45,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 02:35:44" (1/3) ... [2022-01-31 02:35:45,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17da2227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:35:45, skipping insertion in model container [2022-01-31 02:35:45,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:35:44" (2/3) ... [2022-01-31 02:35:45,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17da2227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:35:45, skipping insertion in model container [2022-01-31 02:35:45,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:35:45" (3/3) ... [2022-01-31 02:35:45,042 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_2.i [2022-01-31 02:35:45,046 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-31 02:35:45,046 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 02:35:45,081 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 02:35:45,086 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 02:35:45,086 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 02:35:45,111 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 02:35:45,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 02:35:45,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:35:45,115 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:35:45,115 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:35:45,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:35:45,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1305738320, now seen corresponding path program 1 times [2022-01-31 02:35:45,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:35:45,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54561689] [2022-01-31 02:35:45,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:35:45,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:35:45,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:35:45,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:35:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:35:45,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:35:45,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:35:45,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54561689] [2022-01-31 02:35:45,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54561689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 02:35:45,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 02:35:45,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 02:35:45,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968866984] [2022-01-31 02:35:45,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 02:35:45,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 02:35:45,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:35:45,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 02:35:45,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 02:35:45,364 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:35:45,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:35:45,442 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-01-31 02:35:45,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 02:35:45,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-31 02:35:45,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:35:45,447 INFO L225 Difference]: With dead ends: 34 [2022-01-31 02:35:45,448 INFO L226 Difference]: Without dead ends: 15 [2022-01-31 02:35:45,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 02:35:45,452 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:35:45,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 26 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 02:35:45,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-31 02:35:45,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-01-31 02:35:45,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:35:45,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-01-31 02:35:45,481 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2022-01-31 02:35:45,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:35:45,481 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-01-31 02:35:45,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:35:45,481 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-01-31 02:35:45,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 02:35:45,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:35:45,482 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:35:45,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 02:35:45,483 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:35:45,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:35:45,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1786070446, now seen corresponding path program 1 times [2022-01-31 02:35:45,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:35:45,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869032332] [2022-01-31 02:35:45,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:35:45,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:35:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:35:45,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:35:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:35:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:35:45,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:35:45,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869032332] [2022-01-31 02:35:45,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869032332] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:35:45,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3402082] [2022-01-31 02:35:45,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:35:45,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:35:45,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:35:45,572 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) [2022-01-31 02:35:45,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 02:35:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:35:45,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 02:35:45,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:35:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:35:45,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:35:45,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:35:45,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3402082] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:35:45,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:35:45,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 02:35:45,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686838426] [2022-01-31 02:35:45,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:35:45,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 02:35:45,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:35:45,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 02:35:45,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 02:35:45,731 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:35:45,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:35:45,809 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-01-31 02:35:45,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 02:35:45,810 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 02:35:45,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:35:45,811 INFO L225 Difference]: With dead ends: 25 [2022-01-31 02:35:45,811 INFO L226 Difference]: Without dead ends: 20 [2022-01-31 02:35:45,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 02:35:45,813 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 02:35:45,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 28 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 02:35:45,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-31 02:35:45,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-31 02:35:45,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:35:45,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-01-31 02:35:45,817 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 13 [2022-01-31 02:35:45,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:35:45,817 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-01-31 02:35:45,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:35:45,818 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-01-31 02:35:45,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 02:35:45,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:35:45,818 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:35:45,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 02:35:46,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:35:46,036 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:35:46,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:35:46,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1161520328, now seen corresponding path program 2 times [2022-01-31 02:35:46,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:35:46,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319964688] [2022-01-31 02:35:46,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:35:46,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:35:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:35:46,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:35:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:35:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:35:46,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:35:46,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319964688] [2022-01-31 02:35:46,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319964688] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:35:46,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715585911] [2022-01-31 02:35:46,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 02:35:46,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:35:46,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:35:46,160 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) [2022-01-31 02:35:46,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 02:35:46,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 02:35:46,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:35:46,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 02:35:46,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:35:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:35:46,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:35:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:35:46,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715585911] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:35:46,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:35:46,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-31 02:35:46,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144756559] [2022-01-31 02:35:46,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:35:46,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 02:35:46,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:35:46,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 02:35:46,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 02:35:46,359 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:35:46,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:35:46,521 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-01-31 02:35:46,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 02:35:46,521 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 02:35:46,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:35:46,522 INFO L225 Difference]: With dead ends: 37 [2022-01-31 02:35:46,522 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 02:35:46,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-01-31 02:35:46,523 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 02:35:46,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 28 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 02:35:46,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 02:35:46,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-31 02:35:46,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:35:46,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2022-01-31 02:35:46,528 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 19 [2022-01-31 02:35:46,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:35:46,528 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2022-01-31 02:35:46,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:35:46,528 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2022-01-31 02:35:46,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 02:35:46,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:35:46,529 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:35:46,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-31 02:35:46,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-31 02:35:46,738 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:35:46,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:35:46,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1393651588, now seen corresponding path program 3 times [2022-01-31 02:35:46,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:35:46,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028093966] [2022-01-31 02:35:46,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:35:46,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:35:46,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:35:46,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:35:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:35:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:35:46,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:35:46,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028093966] [2022-01-31 02:35:46,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028093966] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:35:46,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349730079] [2022-01-31 02:35:46,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 02:35:46,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:35:46,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:35:46,961 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) [2022-01-31 02:35:46,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 02:35:46,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-31 02:35:46,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:35:46,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 02:35:46,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:35:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:35:47,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:35:47,248 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:35:47,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349730079] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:35:47,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:35:47,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-31 02:35:47,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217298970] [2022-01-31 02:35:47,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:35:47,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 02:35:47,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:35:47,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 02:35:47,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 02:35:47,250 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:35:47,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:35:47,570 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2022-01-31 02:35:47,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 02:35:47,571 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-31 02:35:47,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:35:47,572 INFO L225 Difference]: With dead ends: 61 [2022-01-31 02:35:47,572 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 02:35:47,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 02:35:47,574 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:35:47,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 48 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 02:35:47,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 02:35:47,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-01-31 02:35:47,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:35:47,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2022-01-31 02:35:47,579 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 31 [2022-01-31 02:35:47,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:35:47,579 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2022-01-31 02:35:47,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:35:47,579 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2022-01-31 02:35:47,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 02:35:47,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:35:47,580 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:35:47,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 02:35:47,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:35:47,791 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:35:47,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:35:47,792 INFO L85 PathProgramCache]: Analyzing trace with hash 603069924, now seen corresponding path program 4 times [2022-01-31 02:35:47,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:35:47,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654997271] [2022-01-31 02:35:47,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:35:47,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:35:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:35:48,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:35:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:35:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:35:48,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:35:48,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654997271] [2022-01-31 02:35:48,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654997271] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:35:48,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457911314] [2022-01-31 02:35:48,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 02:35:48,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:35:48,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:35:48,061 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) [2022-01-31 02:35:48,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 02:35:48,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 02:35:48,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:35:48,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 02:35:48,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:35:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:35:48,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:35:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:35:49,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457911314] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:35:49,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:35:49,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-01-31 02:35:49,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125202187] [2022-01-31 02:35:49,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:35:49,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 02:35:49,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:35:49,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 02:35:49,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 02:35:49,021 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:35:49,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:35:49,989 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2022-01-31 02:35:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 02:35:49,989 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-31 02:35:49,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:35:49,990 INFO L225 Difference]: With dead ends: 109 [2022-01-31 02:35:49,990 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 02:35:49,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 02:35:49,993 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 121 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:35:49,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 23 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 02:35:49,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 02:35:50,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-01-31 02:35:50,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 99 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:35:50,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2022-01-31 02:35:50,001 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 55 [2022-01-31 02:35:50,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:35:50,001 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2022-01-31 02:35:50,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:35:50,002 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2022-01-31 02:35:50,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 02:35:50,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:35:50,004 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:35:50,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-31 02:35:50,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:35:50,219 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:35:50,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:35:50,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1363537740, now seen corresponding path program 5 times [2022-01-31 02:35:50,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:35:50,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261004818] [2022-01-31 02:35:50,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:35:50,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:35:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:35:50,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:35:50,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:35:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:35:50,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:35:50,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261004818] [2022-01-31 02:35:50,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261004818] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:35:50,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666478904] [2022-01-31 02:35:50,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 02:35:50,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:35:50,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:35:51,004 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) [2022-01-31 02:35:51,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 02:35:51,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-01-31 02:35:51,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:35:51,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-31 02:35:51,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:35:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:35:51,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:35:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:35:53,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666478904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:35:53,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:35:53,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-01-31 02:35:53,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495796181] [2022-01-31 02:35:53,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:35:53,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 02:35:53,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:35:53,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 02:35:53,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 02:35:53,642 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 states have internal predecessors, (197), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:35:56,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:35:56,251 INFO L93 Difference]: Finished difference Result 205 states and 252 transitions. [2022-01-31 02:35:56,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 02:35:56,251 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 states have internal predecessors, (197), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-01-31 02:35:56,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:35:56,253 INFO L225 Difference]: With dead ends: 205 [2022-01-31 02:35:56,253 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 02:35:56,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5728 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13777, Invalid=22895, Unknown=0, NotChecked=0, Total=36672 [2022-01-31 02:35:56,275 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 241 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 02:35:56,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 33 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 02:35:56,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 02:35:56,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-01-31 02:35:56,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.005128205128205) internal successors, (196), 195 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:35:56,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2022-01-31 02:35:56,292 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 103 [2022-01-31 02:35:56,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:35:56,292 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2022-01-31 02:35:56,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 states have internal predecessors, (197), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:35:56,292 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2022-01-31 02:35:56,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-31 02:35:56,294 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:35:56,294 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:35:56,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 02:35:56,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:35:56,498 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:35:56,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:35:56,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1918020012, now seen corresponding path program 6 times [2022-01-31 02:35:56,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:35:56,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192568991] [2022-01-31 02:35:56,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:35:56,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:35:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:35:59,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:35:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:35:59,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:35:59,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:35:59,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192568991] [2022-01-31 02:35:59,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192568991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:35:59,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157938060] [2022-01-31 02:35:59,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 02:35:59,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:35:59,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:35:59,343 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) [2022-01-31 02:35:59,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 02:35:59,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-01-31 02:35:59,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:35:59,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 96 conjunts are in the unsatisfiable core [2022-01-31 02:35:59,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:35:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:35:59,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:36:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:36:06,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157938060] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:36:06,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:36:06,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 97, 97] total 194 [2022-01-31 02:36:06,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541556097] [2022-01-31 02:36:06,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:36:06,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-01-31 02:36:06,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:36:06,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-01-31 02:36:06,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18530, Invalid=18912, Unknown=0, NotChecked=0, Total=37442 [2022-01-31 02:36:06,262 INFO L87 Difference]: Start difference. First operand 200 states and 200 transitions. Second operand has 194 states, 194 states have (on average 2.0051546391752577) internal successors, (389), 193 states have internal predecessors, (389), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:36:17,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:36:17,207 INFO L93 Difference]: Finished difference Result 397 states and 492 transitions. [2022-01-31 02:36:17,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-01-31 02:36:17,207 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 2.0051546391752577) internal successors, (389), 193 states have internal predecessors, (389), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-01-31 02:36:17,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:36:17,209 INFO L225 Difference]: With dead ends: 397 [2022-01-31 02:36:17,209 INFO L226 Difference]: Without dead ends: 392 [2022-01-31 02:36:17,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 382 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22984 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=55201, Invalid=91871, Unknown=0, NotChecked=0, Total=147072 [2022-01-31 02:36:17,221 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 481 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 02:36:17,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 33 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 02:36:17,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-01-31 02:36:17,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 392. [2022-01-31 02:36:17,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 387 states have (on average 1.0025839793281655) internal successors, (388), 387 states have internal predecessors, (388), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:36:17,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 392 transitions. [2022-01-31 02:36:17,245 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 392 transitions. Word has length 199 [2022-01-31 02:36:17,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:36:17,245 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 392 transitions. [2022-01-31 02:36:17,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 2.0051546391752577) internal successors, (389), 193 states have internal predecessors, (389), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:36:17,246 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 392 transitions. [2022-01-31 02:36:17,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2022-01-31 02:36:17,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:36:17,249 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:36:17,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-31 02:36:17,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:36:17,463 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:36:17,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:36:17,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1679909268, now seen corresponding path program 7 times [2022-01-31 02:36:17,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:36:17,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435361955] [2022-01-31 02:36:17,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:36:17,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:36:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:36:26,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:36:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:36:26,541 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:36:26,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:36:26,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435361955] [2022-01-31 02:36:26,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435361955] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:36:26,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320456545] [2022-01-31 02:36:26,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 02:36:26,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:36:26,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:36:26,543 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) [2022-01-31 02:36:26,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 02:36:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:36:26,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 192 conjunts are in the unsatisfiable core [2022-01-31 02:36:26,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:36:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:36:27,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:36:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:36:51,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320456545] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:36:51,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:36:51,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 193, 193] total 386 [2022-01-31 02:36:51,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613247590] [2022-01-31 02:36:51,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:36:51,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 386 states [2022-01-31 02:36:51,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:36:51,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 386 interpolants. [2022-01-31 02:36:51,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73922, Invalid=74688, Unknown=0, NotChecked=0, Total=148610 [2022-01-31 02:36:51,139 INFO L87 Difference]: Start difference. First operand 392 states and 392 transitions. Second operand has 386 states, 386 states have (on average 2.0025906735751295) internal successors, (773), 385 states have internal predecessors, (773), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:37:27,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:37:27,525 INFO L93 Difference]: Finished difference Result 781 states and 972 transitions. [2022-01-31 02:37:27,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 385 states. [2022-01-31 02:37:27,526 INFO L78 Accepts]: Start accepts. Automaton has has 386 states, 386 states have (on average 2.0025906735751295) internal successors, (773), 385 states have internal predecessors, (773), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 391 [2022-01-31 02:37:27,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:37:27,538 INFO L225 Difference]: With dead ends: 781 [2022-01-31 02:37:27,538 INFO L226 Difference]: Without dead ends: 776 [2022-01-31 02:37:27,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1358 GetRequests, 592 SyntacticMatches, 0 SemanticMatches, 766 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92056 ImplicationChecksByTransitivity, 64.4s TimeCoverageRelationStatistics Valid=220993, Invalid=368063, Unknown=0, NotChecked=0, Total=589056 [2022-01-31 02:37:27,566 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 961 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 02:37:27,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [961 Valid, 48 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [582 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 02:37:27,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-01-31 02:37:27,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 776. [2022-01-31 02:37:27,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 771 states have (on average 1.0012970168612192) internal successors, (772), 771 states have internal predecessors, (772), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:37:27,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 776 transitions. [2022-01-31 02:37:27,615 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 776 transitions. Word has length 391 [2022-01-31 02:37:27,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:37:27,615 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 776 transitions. [2022-01-31 02:37:27,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 386 states, 386 states have (on average 2.0025906735751295) internal successors, (773), 385 states have internal predecessors, (773), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:37:27,616 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 776 transitions. [2022-01-31 02:37:27,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2022-01-31 02:37:27,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:37:27,660 INFO L514 BasicCegarLoop]: trace histogram [382, 382, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:37:27,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 02:37:27,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:37:27,878 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:37:27,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:37:27,878 INFO L85 PathProgramCache]: Analyzing trace with hash 188708884, now seen corresponding path program 8 times [2022-01-31 02:37:27,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:37:27,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325447442] [2022-01-31 02:37:27,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:37:27,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:37:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:38:02,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:38:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:38:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:38:02,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:38:02,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325447442] [2022-01-31 02:38:02,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325447442] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:38:02,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245235238] [2022-01-31 02:38:02,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 02:38:02,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:38:02,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:38:02,188 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) [2022-01-31 02:38:02,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 02:38:02,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 02:38:02,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:38:02,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 384 conjunts are in the unsatisfiable core [2022-01-31 02:38:02,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:38:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:38:03,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:39:36,538 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:39:36,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245235238] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:39:36,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:39:36,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [386, 385, 385] total 770 [2022-01-31 02:39:36,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43252652] [2022-01-31 02:39:36,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:39:36,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 770 states [2022-01-31 02:39:36,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:39:36,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 770 interpolants. [2022-01-31 02:39:36,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295298, Invalid=296832, Unknown=0, NotChecked=0, Total=592130 [2022-01-31 02:39:36,599 INFO L87 Difference]: Start difference. First operand 776 states and 776 transitions. Second operand has 770 states, 770 states have (on average 2.001298701298701) internal successors, (1541), 769 states have internal predecessors, (1541), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:42:21,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:42:21,886 INFO L93 Difference]: Finished difference Result 1549 states and 1932 transitions. [2022-01-31 02:42:21,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 769 states. [2022-01-31 02:42:21,888 INFO L78 Accepts]: Start accepts. Automaton has has 770 states, 770 states have (on average 2.001298701298701) internal successors, (1541), 769 states have internal predecessors, (1541), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 775 [2022-01-31 02:42:21,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:42:21,894 INFO L225 Difference]: With dead ends: 1549 [2022-01-31 02:42:21,894 INFO L226 Difference]: Without dead ends: 1544 [2022-01-31 02:42:22,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2702 GetRequests, 1168 SyntacticMatches, 0 SemanticMatches, 1534 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368440 ImplicationChecksByTransitivity, 267.3s TimeCoverageRelationStatistics Valid=884353, Invalid=1473407, Unknown=0, NotChecked=0, Total=2357760 [2022-01-31 02:42:22,064 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1921 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 1160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1921 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1160 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 02:42:22,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1921 Valid, 48 Invalid, 2731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1160 Valid, 1571 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 02:42:22,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2022-01-31 02:42:22,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1544. [2022-01-31 02:42:22,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1539 states have (on average 1.000649772579597) internal successors, (1540), 1539 states have internal predecessors, (1540), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:42:22,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1544 transitions. [2022-01-31 02:42:22,109 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1544 transitions. Word has length 775 [2022-01-31 02:42:22,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:42:22,110 INFO L470 AbstractCegarLoop]: Abstraction has 1544 states and 1544 transitions. [2022-01-31 02:42:22,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 770 states, 770 states have (on average 2.001298701298701) internal successors, (1541), 769 states have internal predecessors, (1541), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:42:22,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1544 transitions. [2022-01-31 02:42:22,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1544 [2022-01-31 02:42:22,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:42:22,131 INFO L514 BasicCegarLoop]: trace histogram [766, 766, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:42:22,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-31 02:42:22,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-31 02:42:22,344 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:42:22,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:42:22,344 INFO L85 PathProgramCache]: Analyzing trace with hash 39036180, now seen corresponding path program 9 times [2022-01-31 02:42:22,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:42:22,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239665705] [2022-01-31 02:42:22,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:42:22,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:42:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:44:33,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:44:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:44:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 586756 backedges. 0 proven. 586756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:44:33,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:44:33,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239665705] [2022-01-31 02:44:33,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239665705] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:44:33,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034239405] [2022-01-31 02:44:33,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 02:44:33,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:44:33,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:44:33,960 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) [2022-01-31 02:44:33,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 02:44:41,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 767 check-sat command(s) [2022-01-31 02:44:41,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:44:41,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 2345 conjuncts, 768 conjunts are in the unsatisfiable core [2022-01-31 02:44:41,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:44:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 586756 backedges. 0 proven. 586756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:44:44,603 INFO L328 TraceCheckSpWp]: Computing backward predicates...