/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/array-examples/standard_maxInArray_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 21:14:16,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 21:14:16,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 21:14:16,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-30 21:14:16,651 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 [2022-01-30 21:14:16,663 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 21:14:16,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 21:14:16,664 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 21:14:16,664 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 21:14:16,664 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 21:14:16,665 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 21:14:16,665 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 21:14:16,665 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 21:14:16,665 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 21:14:16,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 21:14:16,665 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 21:14:16,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 21:14:16,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 21:14:16,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 21:14:16,666 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 21:14:16,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 21:14:16,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 21:14:16,666 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 21:14:16,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 21:14:16,666 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 21:14:16,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 21:14:16,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 21:14:16,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 21:14:16,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 21:14:16,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 21:14:16,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 21:14:16,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 21:14:16,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 21:14:16,668 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 21:14:16,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 21:14:16,668 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 21:14:16,668 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 21:14:16,668 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 21:14:16,668 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 21:14:16,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 21:14:16,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 21:14:16,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 21:14:16,860 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 21:14:16,860 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 21:14:16,861 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_maxInArray_ground.i [2022-01-30 21:14:16,903 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65662ecdf/7ca6036f278c410cb2d3f57abda113d8/FLAG2f323934d [2022-01-30 21:14:17,266 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 21:14:17,266 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_maxInArray_ground.i [2022-01-30 21:14:17,274 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65662ecdf/7ca6036f278c410cb2d3f57abda113d8/FLAG2f323934d [2022-01-30 21:14:17,684 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65662ecdf/7ca6036f278c410cb2d3f57abda113d8 [2022-01-30 21:14:17,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 21:14:17,687 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 21:14:17,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 21:14:17,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 21:14:17,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 21:14:17,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 09:14:17" (1/1) ... [2022-01-30 21:14:17,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f73e2d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:14:17, skipping insertion in model container [2022-01-30 21:14:17,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 09:14:17" (1/1) ... [2022-01-30 21:14:17,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 21:14:17,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 21:14:17,828 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_maxInArray_ground.i[819,832] [2022-01-30 21:14:17,837 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 21:14:17,841 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 21:14:17,849 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_maxInArray_ground.i[819,832] [2022-01-30 21:14:17,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 21:14:17,871 INFO L208 MainTranslator]: Completed translation [2022-01-30 21:14:17,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:14:17 WrapperNode [2022-01-30 21:14:17,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 21:14:17,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 21:14:17,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 21:14:17,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 21:14:17,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:14:17" (1/1) ... [2022-01-30 21:14:17,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:14:17" (1/1) ... [2022-01-30 21:14:17,885 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:14:17" (1/1) ... [2022-01-30 21:14:17,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:14:17" (1/1) ... [2022-01-30 21:14:17,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:14:17" (1/1) ... [2022-01-30 21:14:17,896 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:14:17" (1/1) ... [2022-01-30 21:14:17,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:14:17" (1/1) ... [2022-01-30 21:14:17,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 21:14:17,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 21:14:17,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 21:14:17,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 21:14:17,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:14:17" (1/1) ... [2022-01-30 21:14:17,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 21:14:17,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:14:17,923 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) [2022-01-30 21:14:17,927 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 [2022-01-30 21:14:17,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 21:14:17,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 21:14:17,955 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 21:14:17,956 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-30 21:14:17,956 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 21:14:17,956 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 21:14:17,956 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 21:14:17,956 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-30 21:14:17,956 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-30 21:14:17,956 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 21:14:17,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 21:14:17,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-30 21:14:17,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 21:14:17,956 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 21:14:17,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-30 21:14:17,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 21:14:17,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 21:14:17,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 21:14:17,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 21:14:17,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 21:14:17,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 21:14:18,003 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 21:14:18,004 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 21:14:18,091 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 21:14:18,095 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 21:14:18,095 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-30 21:14:18,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 09:14:18 BoogieIcfgContainer [2022-01-30 21:14:18,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 21:14:18,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 21:14:18,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 21:14:18,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 21:14:18,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 09:14:17" (1/3) ... [2022-01-30 21:14:18,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@492f78e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 09:14:18, skipping insertion in model container [2022-01-30 21:14:18,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:14:17" (2/3) ... [2022-01-30 21:14:18,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@492f78e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 09:14:18, skipping insertion in model container [2022-01-30 21:14:18,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 09:14:18" (3/3) ... [2022-01-30 21:14:18,102 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_maxInArray_ground.i [2022-01-30 21:14:18,106 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 21:14:18,106 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 21:14:18,137 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 21:14:18,142 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 [2022-01-30 21:14:18,142 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 21:14:18,153 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 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) [2022-01-30 21:14:18,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-30 21:14:18,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:14:18,157 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:14:18,157 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:14:18,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:14:18,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1266308725, now seen corresponding path program 1 times [2022-01-30 21:14:18,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:14:18,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448395131] [2022-01-30 21:14:18,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:14:18,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:14:18,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:18,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:14:18,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:14:18,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:14:18,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448395131] [2022-01-30 21:14:18,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448395131] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:14:18,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 21:14:18,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 21:14:18,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346940768] [2022-01-30 21:14:18,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:14:18,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 21:14:18,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:14:18,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 21:14:18,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 21:14:18,382 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 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 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-01-30 21:14:18,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:14:18,418 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-01-30 21:14:18,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 21:14:18,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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 15 [2022-01-30 21:14:18,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:14:18,428 INFO L225 Difference]: With dead ends: 48 [2022-01-30 21:14:18,428 INFO L226 Difference]: Without dead ends: 23 [2022-01-30 21:14:18,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 21:14:18,436 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 21:14:18,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 33 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 21:14:18,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-30 21:14:18,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-30 21:14:18,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 21:14:18,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-01-30 21:14:18,465 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2022-01-30 21:14:18,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:14:18,465 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-01-30 21:14:18,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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) [2022-01-30 21:14:18,465 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-01-30 21:14:18,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-30 21:14:18,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:14:18,466 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:14:18,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-30 21:14:18,467 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:14:18,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:14:18,470 INFO L85 PathProgramCache]: Analyzing trace with hash -184122438, now seen corresponding path program 1 times [2022-01-30 21:14:18,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:14:18,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154052423] [2022-01-30 21:14:18,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:14:18,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:14:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:18,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:14:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:18,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:14:18,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:14:18,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154052423] [2022-01-30 21:14:18,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154052423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:14:18,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 21:14:18,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 21:14:18,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741858805] [2022-01-30 21:14:18,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:14:18,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 21:14:18,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:14:18,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 21:14:18,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-30 21:14:18,550 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-01-30 21:14:18,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:14:18,611 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-01-30 21:14:18,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-30 21:14:18,613 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 15 [2022-01-30 21:14:18,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:14:18,614 INFO L225 Difference]: With dead ends: 40 [2022-01-30 21:14:18,614 INFO L226 Difference]: Without dead ends: 25 [2022-01-30 21:14:18,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-30 21:14:18,618 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 21:14:18,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 30 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 21:14:18,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-30 21:14:18,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-01-30 21:14:18,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 21:14:18,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-01-30 21:14:18,630 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2022-01-30 21:14:18,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:14:18,633 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-01-30 21:14:18,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-01-30 21:14:18,637 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-01-30 21:14:18,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-30 21:14:18,638 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:14:18,638 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:14:18,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-30 21:14:18,638 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:14:18,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:14:18,639 INFO L85 PathProgramCache]: Analyzing trace with hash -960056744, now seen corresponding path program 1 times [2022-01-30 21:14:18,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:14:18,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235347512] [2022-01-30 21:14:18,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:14:18,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:14:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:18,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:14:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:14:18,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:14:18,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235347512] [2022-01-30 21:14:18,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235347512] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:14:18,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814240536] [2022-01-30 21:14:18,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:14:18,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:14:18,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:14:18,720 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) [2022-01-30 21:14:18,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-30 21:14:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:18,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 21:14:18,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:14:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-30 21:14:18,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 21:14:18,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814240536] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:14:18,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 21:14:18,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-30 21:14:18,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262657577] [2022-01-30 21:14:18,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:14:18,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 21:14:18,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:14:18,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 21:14:18,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 21:14:18,838 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:14:18,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:14:18,849 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-01-30 21:14:18,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 21:14:18,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 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 17 [2022-01-30 21:14:18,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:14:18,851 INFO L225 Difference]: With dead ends: 38 [2022-01-30 21:14:18,852 INFO L226 Difference]: Without dead ends: 27 [2022-01-30 21:14:18,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 21:14:18,854 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 21:14:18,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 44 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 21:14:18,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-30 21:14:18,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-01-30 21:14:18,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 21:14:18,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-01-30 21:14:18,865 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2022-01-30 21:14:18,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:14:18,865 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-01-30 21:14:18,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:14:18,866 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-01-30 21:14:18,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-30 21:14:18,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:14:18,866 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:14:18,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-30 21:14:19,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:14:19,084 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:14:19,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:14:19,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1441731324, now seen corresponding path program 1 times [2022-01-30 21:14:19,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:14:19,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962999199] [2022-01-30 21:14:19,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:14:19,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:14:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:19,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:14:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-30 21:14:19,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:14:19,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962999199] [2022-01-30 21:14:19,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962999199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:14:19,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636963534] [2022-01-30 21:14:19,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:14:19,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:14:19,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:14:19,133 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) [2022-01-30 21:14:19,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-30 21:14:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:19,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 21:14:19,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:14:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-30 21:14:19,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:14:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-30 21:14:19,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636963534] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:14:19,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:14:19,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-30 21:14:19,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251897633] [2022-01-30 21:14:19,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:14:19,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 21:14:19,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:14:19,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 21:14:19,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-30 21:14:19,267 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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) [2022-01-30 21:14:19,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:14:19,352 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-01-30 21:14:19,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 21:14:19,353 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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 20 [2022-01-30 21:14:19,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:14:19,354 INFO L225 Difference]: With dead ends: 47 [2022-01-30 21:14:19,354 INFO L226 Difference]: Without dead ends: 31 [2022-01-30 21:14:19,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-30 21:14:19,356 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 21:14:19,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 35 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 21:14:19,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-30 21:14:19,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-01-30 21:14:19,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 21:14:19,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-01-30 21:14:19,369 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 20 [2022-01-30 21:14:19,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:14:19,369 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-01-30 21:14:19,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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) [2022-01-30 21:14:19,369 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-01-30 21:14:19,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-30 21:14:19,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:14:19,370 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:14:19,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-30 21:14:19,583 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,SelfDestructingSolverStorable3 [2022-01-30 21:14:19,584 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:14:19,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:14:19,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1880457758, now seen corresponding path program 2 times [2022-01-30 21:14:19,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:14:19,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56238917] [2022-01-30 21:14:19,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:14:19,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:14:19,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:19,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:14:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-30 21:14:19,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:14:19,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56238917] [2022-01-30 21:14:19,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56238917] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:14:19,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078121190] [2022-01-30 21:14:19,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 21:14:19,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:14:19,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:14:19,631 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) [2022-01-30 21:14:19,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-30 21:14:19,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 21:14:19,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:14:19,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 21:14:19,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:14:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-30 21:14:19,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:14:19,789 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-30 21:14:19,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078121190] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:14:19,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:14:19,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-30 21:14:19,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31089686] [2022-01-30 21:14:19,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:14:19,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 21:14:19,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:14:19,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 21:14:19,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-30 21:14:19,791 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 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) [2022-01-30 21:14:19,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:14:19,861 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2022-01-30 21:14:19,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 21:14:19,861 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 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 26 [2022-01-30 21:14:19,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:14:19,862 INFO L225 Difference]: With dead ends: 51 [2022-01-30 21:14:19,862 INFO L226 Difference]: Without dead ends: 40 [2022-01-30 21:14:19,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-30 21:14:19,863 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 42 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 21:14:19,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 39 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 21:14:19,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-30 21:14:19,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-30 21:14:19,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 21:14:19,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-01-30 21:14:19,867 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 26 [2022-01-30 21:14:19,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:14:19,867 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-01-30 21:14:19,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 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) [2022-01-30 21:14:19,867 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-01-30 21:14:19,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-30 21:14:19,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:14:19,868 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:14:19,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-30 21:14:20,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:14:20,084 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:14:20,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:14:20,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1192961330, now seen corresponding path program 3 times [2022-01-30 21:14:20,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:14:20,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046855279] [2022-01-30 21:14:20,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:14:20,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:14:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:20,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:14:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-30 21:14:20,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:14:20,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046855279] [2022-01-30 21:14:20,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046855279] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:14:20,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874782305] [2022-01-30 21:14:20,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 21:14:20,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:14:20,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:14:20,202 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) [2022-01-30 21:14:20,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-30 21:14:20,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-30 21:14:20,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:14:20,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 21:14:20,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:14:20,364 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-30 21:14:20,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:14:20,467 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-30 21:14:20,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874782305] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:14:20,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:14:20,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-01-30 21:14:20,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074559411] [2022-01-30 21:14:20,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:14:20,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-30 21:14:20,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:14:20,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-30 21:14:20,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-01-30 21:14:20,469 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 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) [2022-01-30 21:14:20,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:14:20,753 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2022-01-30 21:14:20,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-30 21:14:20,753 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 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 35 [2022-01-30 21:14:20,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:14:20,754 INFO L225 Difference]: With dead ends: 86 [2022-01-30 21:14:20,754 INFO L226 Difference]: Without dead ends: 61 [2022-01-30 21:14:20,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2022-01-30 21:14:20,755 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 98 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 21:14:20,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 42 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 21:14:20,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-30 21:14:20,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-01-30 21:14:20,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 21:14:20,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-01-30 21:14:20,760 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 35 [2022-01-30 21:14:20,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:14:20,761 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-01-30 21:14:20,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 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) [2022-01-30 21:14:20,761 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-01-30 21:14:20,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-30 21:14:20,762 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:14:20,762 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:14:20,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-30 21:14:20,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:14:20,981 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:14:20,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:14:20,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1487106896, now seen corresponding path program 4 times [2022-01-30 21:14:20,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:14:20,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417707885] [2022-01-30 21:14:20,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:14:20,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:14:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:21,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:14:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-01-30 21:14:21,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:14:21,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417707885] [2022-01-30 21:14:21,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417707885] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:14:21,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873516803] [2022-01-30 21:14:21,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 21:14:21,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:14:21,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:14:21,078 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) [2022-01-30 21:14:21,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-30 21:14:21,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 21:14:21,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:14:21,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-30 21:14:21,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:14:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-01-30 21:14:21,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:14:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-01-30 21:14:21,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873516803] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:14:21,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:14:21,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-01-30 21:14:21,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576576629] [2022-01-30 21:14:21,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:14:21,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-30 21:14:21,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:14:21,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-30 21:14:21,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-30 21:14:21,343 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 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) [2022-01-30 21:14:21,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:14:21,506 INFO L93 Difference]: Finished difference Result 117 states and 147 transitions. [2022-01-30 21:14:21,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-30 21:14:21,506 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 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 [2022-01-30 21:14:21,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:14:21,509 INFO L225 Difference]: With dead ends: 117 [2022-01-30 21:14:21,509 INFO L226 Difference]: Without dead ends: 74 [2022-01-30 21:14:21,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=288, Invalid=468, Unknown=0, NotChecked=0, Total=756 [2022-01-30 21:14:21,510 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 42 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 21:14:21,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 50 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 21:14:21,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-30 21:14:21,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-01-30 21:14:21,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 68 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 21:14:21,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2022-01-30 21:14:21,527 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 55 [2022-01-30 21:14:21,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:14:21,527 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2022-01-30 21:14:21,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 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) [2022-01-30 21:14:21,527 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2022-01-30 21:14:21,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-30 21:14:21,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:14:21,528 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:14:21,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-30 21:14:21,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:14:21,746 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:14:21,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:14:21,746 INFO L85 PathProgramCache]: Analyzing trace with hash 337426978, now seen corresponding path program 5 times [2022-01-30 21:14:21,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:14:21,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90130970] [2022-01-30 21:14:21,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:14:21,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:14:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:21,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:14:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:21,910 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-01-30 21:14:21,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:14:21,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90130970] [2022-01-30 21:14:21,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90130970] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:14:21,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216610909] [2022-01-30 21:14:21,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 21:14:21,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:14:21,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:14:21,912 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) [2022-01-30 21:14:21,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-30 21:14:22,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-01-30 21:14:22,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:14:22,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-30 21:14:22,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:14:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-01-30 21:14:22,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:14:22,489 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-01-30 21:14:22,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216610909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:14:22,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:14:22,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-01-30 21:14:22,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694330107] [2022-01-30 21:14:22,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:14:22,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-30 21:14:22,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:14:22,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-30 21:14:22,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-30 21:14:22,491 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 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) [2022-01-30 21:14:22,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:14:22,919 INFO L93 Difference]: Finished difference Result 145 states and 182 transitions. [2022-01-30 21:14:22,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-30 21:14:22,920 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 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 69 [2022-01-30 21:14:22,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:14:22,921 INFO L225 Difference]: With dead ends: 145 [2022-01-30 21:14:22,921 INFO L226 Difference]: Without dead ends: 102 [2022-01-30 21:14:22,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1163, Invalid=1917, Unknown=0, NotChecked=0, Total=3080 [2022-01-30 21:14:22,922 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 83 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 21:14:22,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 40 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 21:14:22,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-30 21:14:22,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-01-30 21:14:22,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 96 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 21:14:22,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2022-01-30 21:14:22,929 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 69 [2022-01-30 21:14:22,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:14:22,929 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2022-01-30 21:14:22,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 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) [2022-01-30 21:14:22,929 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2022-01-30 21:14:22,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-30 21:14:22,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:14:22,930 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:14:22,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-30 21:14:23,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:14:23,131 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:14:23,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:14:23,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1960730950, now seen corresponding path program 6 times [2022-01-30 21:14:23,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:14:23,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145310646] [2022-01-30 21:14:23,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:14:23,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:14:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:23,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:14:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-01-30 21:14:23,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:14:23,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145310646] [2022-01-30 21:14:23,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145310646] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:14:23,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388569653] [2022-01-30 21:14:23,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-30 21:14:23,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:14:23,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:14:23,513 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) [2022-01-30 21:14:23,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-30 21:14:23,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-01-30 21:14:23,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:14:23,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-30 21:14:23,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:14:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-01-30 21:14:24,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:14:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-01-30 21:14:24,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388569653] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:14:24,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:14:24,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 13, 13] total 52 [2022-01-30 21:14:24,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702495474] [2022-01-30 21:14:24,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:14:24,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-30 21:14:24,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:14:24,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-30 21:14:24,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=1969, Unknown=0, NotChecked=0, Total=2652 [2022-01-30 21:14:24,509 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand has 52 states, 52 states have (on average 2.5961538461538463) internal successors, (135), 51 states have internal predecessors, (135), 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) [2022-01-30 21:14:25,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:14:25,499 INFO L93 Difference]: Finished difference Result 184 states and 232 transitions. [2022-01-30 21:14:25,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-30 21:14:25,499 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.5961538461538463) internal successors, (135), 51 states have internal predecessors, (135), 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 97 [2022-01-30 21:14:25,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:14:25,500 INFO L225 Difference]: With dead ends: 184 [2022-01-30 21:14:25,500 INFO L226 Difference]: Without dead ends: 141 [2022-01-30 21:14:25,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2089 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2043, Invalid=8057, Unknown=0, NotChecked=0, Total=10100 [2022-01-30 21:14:25,504 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 254 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 21:14:25,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 57 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 21:14:25,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-30 21:14:25,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2022-01-30 21:14:25,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 134 states have (on average 1.1865671641791045) internal successors, (159), 134 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 21:14:25,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 164 transitions. [2022-01-30 21:14:25,511 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 164 transitions. Word has length 97 [2022-01-30 21:14:25,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:14:25,512 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 164 transitions. [2022-01-30 21:14:25,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.5961538461538463) internal successors, (135), 51 states have internal predecessors, (135), 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) [2022-01-30 21:14:25,512 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 164 transitions. [2022-01-30 21:14:25,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-30 21:14:25,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:14:25,513 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:14:25,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-30 21:14:25,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:14:25,734 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:14:25,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:14:25,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1485426532, now seen corresponding path program 7 times [2022-01-30 21:14:25,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:14:25,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610095004] [2022-01-30 21:14:25,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:14:25,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:14:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:26,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:14:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-01-30 21:14:26,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:14:26,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610095004] [2022-01-30 21:14:26,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610095004] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:14:26,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805037582] [2022-01-30 21:14:26,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-30 21:14:26,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:14:26,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:14:26,127 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) [2022-01-30 21:14:26,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-30 21:14:26,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:26,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-30 21:14:26,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:14:26,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-01-30 21:14:26,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:14:27,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-01-30 21:14:27,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805037582] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:14:27,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:14:27,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-01-30 21:14:27,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295914292] [2022-01-30 21:14:27,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:14:27,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-30 21:14:27,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:14:27,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-30 21:14:27,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-30 21:14:27,300 INFO L87 Difference]: Start difference. First operand 140 states and 164 transitions. Second operand has 60 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 59 states have internal predecessors, (128), 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) [2022-01-30 21:14:28,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:14:28,525 INFO L93 Difference]: Finished difference Result 277 states and 353 transitions. [2022-01-30 21:14:28,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-30 21:14:28,526 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 59 states have internal predecessors, (128), 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 135 [2022-01-30 21:14:28,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:14:28,527 INFO L225 Difference]: With dead ends: 277 [2022-01-30 21:14:28,527 INFO L226 Difference]: Without dead ends: 198 [2022-01-30 21:14:28,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5018, Invalid=8322, Unknown=0, NotChecked=0, Total=13340 [2022-01-30 21:14:28,530 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 130 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 21:14:28,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 50 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 21:14:28,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-01-30 21:14:28,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-01-30 21:14:28,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 192 states have (on average 1.1302083333333333) internal successors, (217), 192 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 21:14:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 222 transitions. [2022-01-30 21:14:28,542 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 222 transitions. Word has length 135 [2022-01-30 21:14:28,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:14:28,543 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 222 transitions. [2022-01-30 21:14:28,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 59 states have internal predecessors, (128), 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) [2022-01-30 21:14:28,544 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 222 transitions. [2022-01-30 21:14:28,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-30 21:14:28,548 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:14:28,548 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:14:28,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-30 21:14:28,759 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,SelfDestructingSolverStorable9 [2022-01-30 21:14:28,760 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:14:28,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:14:28,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2002315338, now seen corresponding path program 8 times [2022-01-30 21:14:28,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:14:28,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35371150] [2022-01-30 21:14:28,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:14:28,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:14:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:29,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:14:29,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:29,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3851 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-01-30 21:14:29,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:14:29,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35371150] [2022-01-30 21:14:29,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35371150] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:14:29,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669218691] [2022-01-30 21:14:29,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 21:14:29,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:14:29,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:14:29,922 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) [2022-01-30 21:14:29,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-30 21:14:30,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 21:14:30,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:14:30,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 58 conjunts are in the unsatisfiable core [2022-01-30 21:14:30,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:14:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3851 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-01-30 21:14:30,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:14:33,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3851 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-01-30 21:14:33,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669218691] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:14:33,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:14:33,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 118 [2022-01-30 21:14:33,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768616843] [2022-01-30 21:14:33,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:14:33,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-30 21:14:33,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:14:33,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-30 21:14:33,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-30 21:14:33,203 INFO L87 Difference]: Start difference. First operand 198 states and 222 transitions. Second operand has 118 states, 118 states have (on average 2.0677966101694913) internal successors, (244), 117 states have internal predecessors, (244), 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) [2022-01-30 21:14:37,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:14:37,288 INFO L93 Difference]: Finished difference Result 393 states and 498 transitions. [2022-01-30 21:14:37,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-30 21:14:37,288 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0677966101694913) internal successors, (244), 117 states have internal predecessors, (244), 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 193 [2022-01-30 21:14:37,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:14:37,289 INFO L225 Difference]: With dead ends: 393 [2022-01-30 21:14:37,290 INFO L226 Difference]: Without dead ends: 314 [2022-01-30 21:14:37,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8373 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=20127, Invalid=33465, Unknown=0, NotChecked=0, Total=53592 [2022-01-30 21:14:37,297 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 303 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 21:14:37,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 55 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-30 21:14:37,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-30 21:14:37,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 314. [2022-01-30 21:14:37,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 308 states have (on average 1.0811688311688312) internal successors, (333), 308 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 21:14:37,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 338 transitions. [2022-01-30 21:14:37,305 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 338 transitions. Word has length 193 [2022-01-30 21:14:37,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:14:37,305 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 338 transitions. [2022-01-30 21:14:37,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.0677966101694913) internal successors, (244), 117 states have internal predecessors, (244), 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) [2022-01-30 21:14:37,306 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 338 transitions. [2022-01-30 21:14:37,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-01-30 21:14:37,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:14:37,308 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:14:37,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-30 21:14:37,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:14:37,515 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:14:37,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:14:37,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1717807210, now seen corresponding path program 9 times [2022-01-30 21:14:37,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:14:37,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543026058] [2022-01-30 21:14:37,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:14:37,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:14:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:41,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:14:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 13711 backedges. 0 proven. 12996 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-01-30 21:14:41,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:14:41,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543026058] [2022-01-30 21:14:41,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543026058] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:14:41,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312212133] [2022-01-30 21:14:41,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 21:14:41,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:14:41,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:14:41,344 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:14:41,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-30 21:14:41,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-01-30 21:14:41,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:14:41,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-30 21:14:41,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:14:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13711 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 12996 trivial. 0 not checked. [2022-01-30 21:14:42,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:14:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 13711 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 12996 trivial. 0 not checked. [2022-01-30 21:14:44,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312212133] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:14:44,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:14:44,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 25, 25] total 164 [2022-01-30 21:14:44,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52553628] [2022-01-30 21:14:44,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:14:44,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2022-01-30 21:14:44,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:14:44,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2022-01-30 21:14:44,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7915, Invalid=18817, Unknown=0, NotChecked=0, Total=26732 [2022-01-30 21:14:44,436 INFO L87 Difference]: Start difference. First operand 314 states and 338 transitions. Second operand has 164 states, 164 states have (on average 2.3353658536585367) internal successors, (383), 163 states have internal predecessors, (383), 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) [2022-01-30 21:14:52,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:14:52,282 INFO L93 Difference]: Finished difference Result 468 states and 564 transitions. [2022-01-30 21:14:52,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-01-30 21:14:52,283 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.3353658536585367) internal successors, (383), 163 states have internal predecessors, (383), 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 309 [2022-01-30 21:14:52,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:14:52,285 INFO L225 Difference]: With dead ends: 468 [2022-01-30 21:14:52,285 INFO L226 Difference]: Without dead ends: 389 [2022-01-30 21:14:52,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 897 GetRequests, 574 SyntacticMatches, 0 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20999 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=23739, Invalid=81561, Unknown=0, NotChecked=0, Total=105300 [2022-01-30 21:14:52,291 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 722 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-30 21:14:52,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [723 Valid, 62 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-30 21:14:52,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-01-30 21:14:52,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 388. [2022-01-30 21:14:52,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 382 states have (on average 1.1282722513089005) internal successors, (431), 382 states have internal predecessors, (431), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 21:14:52,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 436 transitions. [2022-01-30 21:14:52,300 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 436 transitions. Word has length 309 [2022-01-30 21:14:52,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:14:52,300 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 436 transitions. [2022-01-30 21:14:52,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 2.3353658536585367) internal successors, (383), 163 states have internal predecessors, (383), 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) [2022-01-30 21:14:52,301 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 436 transitions. [2022-01-30 21:14:52,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-01-30 21:14:52,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:14:52,303 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:14:52,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-30 21:14:52,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-30 21:14:52,523 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:14:52,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:14:52,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1984644532, now seen corresponding path program 10 times [2022-01-30 21:14:52,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:14:52,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414533021] [2022-01-30 21:14:52,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:14:52,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:14:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:56,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:14:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:14:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16376 backedges. 0 proven. 13225 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2022-01-30 21:14:56,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:14:56,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414533021] [2022-01-30 21:14:56,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414533021] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:14:56,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026991207] [2022-01-30 21:14:56,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 21:14:56,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:14:56,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:14:56,351 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:14:56,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-30 21:14:56,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 21:14:56,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:14:56,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 1476 conjuncts, 117 conjunts are in the unsatisfiable core [2022-01-30 21:14:56,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:14:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16376 backedges. 0 proven. 13225 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2022-01-30 21:14:57,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:15:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16376 backedges. 0 proven. 13225 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2022-01-30 21:15:08,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026991207] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:15:08,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:15:08,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 118, 118] total 236 [2022-01-30 21:15:08,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651879485] [2022-01-30 21:15:08,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:15:08,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 236 states [2022-01-30 21:15:08,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:15:08,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 236 interpolants. [2022-01-30 21:15:08,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27497, Invalid=27963, Unknown=0, NotChecked=0, Total=55460 [2022-01-30 21:15:08,240 INFO L87 Difference]: Start difference. First operand 388 states and 436 transitions. Second operand has 236 states, 236 states have (on average 2.0338983050847457) internal successors, (480), 235 states have internal predecessors, (480), 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) [2022-01-30 21:15:24,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:15:24,107 INFO L93 Difference]: Finished difference Result 773 states and 985 transitions. [2022-01-30 21:15:24,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2022-01-30 21:15:24,108 INFO L78 Accepts]: Start accepts. Automaton has has 236 states, 236 states have (on average 2.0338983050847457) internal successors, (480), 235 states have internal predecessors, (480), 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 383 [2022-01-30 21:15:24,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:15:24,110 INFO L225 Difference]: With dead ends: 773 [2022-01-30 21:15:24,110 INFO L226 Difference]: Without dead ends: 622 [2022-01-30 21:15:24,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1117 GetRequests, 651 SyntacticMatches, 0 SemanticMatches, 466 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34156 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=82018, Invalid=136538, Unknown=0, NotChecked=0, Total=218556 [2022-01-30 21:15:24,123 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 598 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-30 21:15:24,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [599 Valid, 60 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-30 21:15:24,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-01-30 21:15:24,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2022-01-30 21:15:24,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 616 states have (on average 1.0795454545454546) internal successors, (665), 616 states have internal predecessors, (665), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 21:15:24,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 670 transitions. [2022-01-30 21:15:24,172 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 670 transitions. Word has length 383 [2022-01-30 21:15:24,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:15:24,172 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 670 transitions. [2022-01-30 21:15:24,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 236 states, 236 states have (on average 2.0338983050847457) internal successors, (480), 235 states have internal predecessors, (480), 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) [2022-01-30 21:15:24,172 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 670 transitions. [2022-01-30 21:15:24,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2022-01-30 21:15:24,180 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:15:24,180 INFO L514 BasicCegarLoop]: trace histogram [232, 232, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:15:24,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-30 21:15:24,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-30 21:15:24,400 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:15:24,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:15:24,400 INFO L85 PathProgramCache]: Analyzing trace with hash 901267690, now seen corresponding path program 11 times [2022-01-30 21:15:24,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:15:24,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788765741] [2022-01-30 21:15:24,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:15:24,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:15:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:39,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:15:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 56975 backedges. 0 proven. 53824 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2022-01-30 21:15:39,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:15:39,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788765741] [2022-01-30 21:15:39,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788765741] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:15:39,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219600316] [2022-01-30 21:15:39,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 21:15:39,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:15:39,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:15:39,253 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:15:39,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process