/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/array-examples/standard_maxInArray_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 18:31:12,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 18:31:12,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 18:31:12,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 18:31:12,391 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 [2023-04-01 18:31:12,416 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 18:31:12,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 18:31:12,417 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 18:31:12,417 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 18:31:12,418 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 18:31:12,418 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 18:31:12,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 18:31:12,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 18:31:12,419 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 18:31:12,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 18:31:12,419 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 18:31:12,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 18:31:12,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 18:31:12,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 18:31:12,420 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 18:31:12,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 18:31:12,420 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 18:31:12,420 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 18:31:12,420 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 18:31:12,420 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 18:31:12,421 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 18:31:12,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 18:31:12,421 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 18:31:12,421 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 18:31:12,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:31:12,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 18:31:12,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 18:31:12,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 18:31:12,422 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 18:31:12,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 18:31:12,422 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 18:31:12,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 18:31:12,422 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 18:31:12,422 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 18:31:12,422 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 18:31:12,422 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 18:31:12,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 18:31:12,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 18:31:12,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 18:31:12,615 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 18:31:12,616 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 18:31:12,617 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_maxInArray_ground.i [2023-04-01 18:31:13,719 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 18:31:13,913 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 18:31:13,914 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_maxInArray_ground.i [2023-04-01 18:31:13,918 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcc45ae66/3d956fdfae8a4feca401dcdf91628a13/FLAGa90093063 [2023-04-01 18:31:13,929 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcc45ae66/3d956fdfae8a4feca401dcdf91628a13 [2023-04-01 18:31:13,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 18:31:13,933 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 18:31:13,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 18:31:13,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 18:31:13,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 18:31:13,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:31:13" (1/1) ... [2023-04-01 18:31:13,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69ee68d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:13, skipping insertion in model container [2023-04-01 18:31:13,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:31:13" (1/1) ... [2023-04-01 18:31:13,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 18:31:13,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 18:31:14,083 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_maxInArray_ground.i[819,832] [2023-04-01 18:31:14,093 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:31:14,100 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 18:31:14,109 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_maxInArray_ground.i[819,832] [2023-04-01 18:31:14,113 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:31:14,123 INFO L208 MainTranslator]: Completed translation [2023-04-01 18:31:14,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:14 WrapperNode [2023-04-01 18:31:14,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 18:31:14,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 18:31:14,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 18:31:14,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 18:31:14,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:14" (1/1) ... [2023-04-01 18:31:14,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:14" (1/1) ... [2023-04-01 18:31:14,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:14" (1/1) ... [2023-04-01 18:31:14,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:14" (1/1) ... [2023-04-01 18:31:14,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:14" (1/1) ... [2023-04-01 18:31:14,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:14" (1/1) ... [2023-04-01 18:31:14,145 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:14" (1/1) ... [2023-04-01 18:31:14,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:14" (1/1) ... [2023-04-01 18:31:14,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 18:31:14,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 18:31:14,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 18:31:14,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 18:31:14,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:14" (1/1) ... [2023-04-01 18:31:14,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:31:14,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:31:14,174 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) [2023-04-01 18:31:14,179 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 [2023-04-01 18:31:14,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 18:31:14,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 18:31:14,201 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 18:31:14,201 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 18:31:14,201 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 18:31:14,202 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 18:31:14,202 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 18:31:14,202 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 18:31:14,202 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 18:31:14,202 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 18:31:14,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 18:31:14,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 18:31:14,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 18:31:14,203 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 18:31:14,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 18:31:14,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 18:31:14,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 18:31:14,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 18:31:14,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 18:31:14,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 18:31:14,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 18:31:14,260 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 18:31:14,262 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 18:31:14,358 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 18:31:14,363 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 18:31:14,363 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 18:31:14,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:31:14 BoogieIcfgContainer [2023-04-01 18:31:14,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 18:31:14,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 18:31:14,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 18:31:14,370 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 18:31:14,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:31:13" (1/3) ... [2023-04-01 18:31:14,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b66c854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:31:14, skipping insertion in model container [2023-04-01 18:31:14,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:14" (2/3) ... [2023-04-01 18:31:14,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b66c854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:31:14, skipping insertion in model container [2023-04-01 18:31:14,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:31:14" (3/3) ... [2023-04-01 18:31:14,372 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_maxInArray_ground.i [2023-04-01 18:31:14,386 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 18:31:14,386 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 18:31:14,439 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 18:31:14,444 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4b8219d0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 18:31:14,444 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 18:31:14,447 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) [2023-04-01 18:31:14,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 18:31:14,453 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:14,453 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:31:14,453 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:14,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:14,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1266308725, now seen corresponding path program 1 times [2023-04-01 18:31:14,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:14,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329604012] [2023-04-01 18:31:14,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:14,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:14,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:14,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:31:14,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:14,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329604012] [2023-04-01 18:31:14,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329604012] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:31:14,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:31:14,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 18:31:14,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175062096] [2023-04-01 18:31:14,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:31:14,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:31:14,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:31:14,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:31:14,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:31:14,721 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) [2023-04-01 18:31:14,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:31:14,821 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2023-04-01 18:31:14,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:31:14,823 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 [2023-04-01 18:31:14,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:31:14,830 INFO L225 Difference]: With dead ends: 48 [2023-04-01 18:31:14,830 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 18:31:14,833 INFO L412 NwaCegarLoop]: 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 [2023-04-01 18:31:14,837 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:31:14,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 10 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:31:14,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 18:31:14,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-01 18:31:14,871 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) [2023-04-01 18:31:14,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-04-01 18:31:14,874 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2023-04-01 18:31:14,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:31:14,875 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-04-01 18:31:14,875 INFO L496 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) [2023-04-01 18:31:14,876 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-04-01 18:31:14,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 18:31:14,877 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:14,877 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:31:14,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 18:31:14,877 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:14,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:14,879 INFO L85 PathProgramCache]: Analyzing trace with hash -184122438, now seen corresponding path program 1 times [2023-04-01 18:31:14,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:14,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055704800] [2023-04-01 18:31:14,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:14,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:14,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:31:14,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:14,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055704800] [2023-04-01 18:31:15,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055704800] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:31:15,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:31:15,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:31:15,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758178183] [2023-04-01 18:31:15,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:31:15,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:31:15,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:31:15,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:31:15,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:31:15,016 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) [2023-04-01 18:31:15,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:31:15,078 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2023-04-01 18:31:15,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:31:15,078 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 [2023-04-01 18:31:15,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:31:15,079 INFO L225 Difference]: With dead ends: 40 [2023-04-01 18:31:15,079 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 18:31:15,080 INFO L412 NwaCegarLoop]: 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 [2023-04-01 18:31:15,081 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:31:15,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 12 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:31:15,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 18:31:15,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-04-01 18:31:15,087 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) [2023-04-01 18:31:15,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-04-01 18:31:15,088 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2023-04-01 18:31:15,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:31:15,088 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-04-01 18:31:15,088 INFO L496 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) [2023-04-01 18:31:15,088 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-04-01 18:31:15,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 18:31:15,089 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:15,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:31:15,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 18:31:15,089 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:15,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:15,090 INFO L85 PathProgramCache]: Analyzing trace with hash -960056744, now seen corresponding path program 1 times [2023-04-01 18:31:15,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:15,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019461840] [2023-04-01 18:31:15,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:15,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:15,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:31:15,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:15,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019461840] [2023-04-01 18:31:15,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019461840] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:31:15,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897118759] [2023-04-01 18:31:15,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:15,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:15,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:31:15,217 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) [2023-04-01 18:31:15,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 18:31:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:15,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 18:31:15,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:31:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:31:15,317 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 18:31:15,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897118759] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:31:15,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 18:31:15,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 18:31:15,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155690655] [2023-04-01 18:31:15,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:31:15,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:31:15,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:31:15,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:31:15,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:31:15,325 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) [2023-04-01 18:31:15,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:31:15,348 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2023-04-01 18:31:15,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:31:15,349 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 [2023-04-01 18:31:15,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:31:15,350 INFO L225 Difference]: With dead ends: 38 [2023-04-01 18:31:15,350 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 18:31:15,351 INFO L412 NwaCegarLoop]: 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 [2023-04-01 18:31:15,354 INFO L413 NwaCegarLoop]: 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 [2023-04-01 18:31:15,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 44 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:31:15,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 18:31:15,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2023-04-01 18:31:15,364 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) [2023-04-01 18:31:15,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-04-01 18:31:15,365 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2023-04-01 18:31:15,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:31:15,365 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-04-01 18:31:15,366 INFO L496 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) [2023-04-01 18:31:15,366 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-04-01 18:31:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 18:31:15,366 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:15,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:31:15,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 18:31:15,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:15,573 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:15,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:15,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1441731324, now seen corresponding path program 1 times [2023-04-01 18:31:15,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:15,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026434474] [2023-04-01 18:31:15,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:15,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:15,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:31:15,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:15,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026434474] [2023-04-01 18:31:15,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026434474] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:31:15,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722740249] [2023-04-01 18:31:15,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:15,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:15,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:31:15,643 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) [2023-04-01 18:31:15,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 18:31:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:15,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 18:31:15,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:31:15,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:31:15,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:31:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:31:15,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722740249] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:31:15,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:31:15,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 18:31:15,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492745620] [2023-04-01 18:31:15,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:31:15,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 18:31:15,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:31:15,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 18:31:15,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 18:31:15,787 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) [2023-04-01 18:31:15,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:31:15,892 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2023-04-01 18:31:15,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:31:15,893 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 [2023-04-01 18:31:15,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:31:15,894 INFO L225 Difference]: With dead ends: 47 [2023-04-01 18:31:15,894 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 18:31:15,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-04-01 18:31:15,898 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:31:15,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 17 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:31:15,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 18:31:15,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-01 18:31:15,910 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) [2023-04-01 18:31:15,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2023-04-01 18:31:15,911 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 20 [2023-04-01 18:31:15,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:31:15,912 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2023-04-01 18:31:15,912 INFO L496 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) [2023-04-01 18:31:15,912 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2023-04-01 18:31:15,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 18:31:15,913 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:15,913 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:31:15,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 18:31:16,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 18:31:16,121 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:16,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:16,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1880457758, now seen corresponding path program 2 times [2023-04-01 18:31:16,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:16,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555637297] [2023-04-01 18:31:16,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:16,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:16,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 18:31:16,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:16,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555637297] [2023-04-01 18:31:16,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555637297] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:31:16,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921010946] [2023-04-01 18:31:16,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:31:16,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:16,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:31:16,254 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) [2023-04-01 18:31:16,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 18:31:16,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:31:16,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:31:16,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 18:31:16,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:31:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 18:31:16,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:31:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 18:31:16,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921010946] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:31:16,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:31:16,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 18:31:16,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888584527] [2023-04-01 18:31:16,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:31:16,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 18:31:16,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:31:16,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 18:31:16,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 18:31:16,393 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) [2023-04-01 18:31:16,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:31:16,483 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2023-04-01 18:31:16,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:31:16,484 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 [2023-04-01 18:31:16,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:31:16,486 INFO L225 Difference]: With dead ends: 51 [2023-04-01 18:31:16,486 INFO L226 Difference]: Without dead ends: 40 [2023-04-01 18:31:16,486 INFO L412 NwaCegarLoop]: 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 [2023-04-01 18:31:16,488 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:31:16,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 22 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:31:16,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-01 18:31:16,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-04-01 18:31:16,498 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) [2023-04-01 18:31:16,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2023-04-01 18:31:16,500 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 26 [2023-04-01 18:31:16,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:31:16,500 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2023-04-01 18:31:16,500 INFO L496 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) [2023-04-01 18:31:16,500 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2023-04-01 18:31:16,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 18:31:16,502 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:16,502 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:31:16,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 18:31:16,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:16,707 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:16,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:16,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1192961330, now seen corresponding path program 3 times [2023-04-01 18:31:16,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:16,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638224150] [2023-04-01 18:31:16,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:16,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:16,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 18:31:16,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:16,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638224150] [2023-04-01 18:31:16,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638224150] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:31:16,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317234400] [2023-04-01 18:31:16,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:31:16,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:16,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:31:16,877 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) [2023-04-01 18:31:16,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 18:31:16,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 18:31:16,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:31:16,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 18:31:16,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:31:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 18:31:17,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:31:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 18:31:17,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317234400] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:31:17,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:31:17,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2023-04-01 18:31:17,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517211407] [2023-04-01 18:31:17,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:31:17,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 18:31:17,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:31:17,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 18:31:17,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2023-04-01 18:31:17,087 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) [2023-04-01 18:31:17,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:31:17,362 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2023-04-01 18:31:17,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 18:31:17,364 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 [2023-04-01 18:31:17,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:31:17,364 INFO L225 Difference]: With dead ends: 86 [2023-04-01 18:31:17,364 INFO L226 Difference]: Without dead ends: 61 [2023-04-01 18:31:17,365 INFO L412 NwaCegarLoop]: 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 [2023-04-01 18:31:17,366 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 94 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:31:17,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 27 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:31:17,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-04-01 18:31:17,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2023-04-01 18:31:17,378 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) [2023-04-01 18:31:17,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2023-04-01 18:31:17,380 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 35 [2023-04-01 18:31:17,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:31:17,380 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2023-04-01 18:31:17,380 INFO L496 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) [2023-04-01 18:31:17,380 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2023-04-01 18:31:17,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 18:31:17,383 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:17,383 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:31:17,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 18:31:17,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:17,588 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:17,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:17,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1487106896, now seen corresponding path program 4 times [2023-04-01 18:31:17,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:17,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991042484] [2023-04-01 18:31:17,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:17,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:17,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-04-01 18:31:17,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:17,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991042484] [2023-04-01 18:31:17,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991042484] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:31:17,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086157394] [2023-04-01 18:31:17,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:31:17,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:17,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:31:17,709 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) [2023-04-01 18:31:17,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 18:31:17,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:31:17,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:31:17,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 18:31:17,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:31:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-04-01 18:31:17,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:31:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-04-01 18:31:17,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086157394] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:31:17,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:31:17,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2023-04-01 18:31:17,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132018621] [2023-04-01 18:31:17,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:31:17,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 18:31:17,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:31:17,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 18:31:17,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2023-04-01 18:31:17,894 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) [2023-04-01 18:31:18,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:31:18,091 INFO L93 Difference]: Finished difference Result 117 states and 147 transitions. [2023-04-01 18:31:18,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 18:31:18,092 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 [2023-04-01 18:31:18,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:31:18,092 INFO L225 Difference]: With dead ends: 117 [2023-04-01 18:31:18,092 INFO L226 Difference]: Without dead ends: 74 [2023-04-01 18:31:18,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=288, Invalid=468, Unknown=0, NotChecked=0, Total=756 [2023-04-01 18:31:18,094 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 45 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:31:18,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 32 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:31:18,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-04-01 18:31:18,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-04-01 18:31:18,102 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) [2023-04-01 18:31:18,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2023-04-01 18:31:18,103 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 55 [2023-04-01 18:31:18,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:31:18,103 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2023-04-01 18:31:18,103 INFO L496 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) [2023-04-01 18:31:18,103 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2023-04-01 18:31:18,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-01 18:31:18,104 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:18,104 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:31:18,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 18:31:18,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:18,310 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:18,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:18,310 INFO L85 PathProgramCache]: Analyzing trace with hash 337426978, now seen corresponding path program 5 times [2023-04-01 18:31:18,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:18,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995777206] [2023-04-01 18:31:18,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:18,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:18,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-04-01 18:31:18,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:18,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995777206] [2023-04-01 18:31:18,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995777206] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:31:18,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922435852] [2023-04-01 18:31:18,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:31:18,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:18,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:31:18,591 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) [2023-04-01 18:31:18,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 18:31:18,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-04-01 18:31:18,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:31:18,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-01 18:31:18,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:31:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-04-01 18:31:18,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:31:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-04-01 18:31:19,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922435852] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:31:19,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:31:19,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2023-04-01 18:31:19,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885976545] [2023-04-01 18:31:19,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:31:19,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-04-01 18:31:19,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:31:19,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-04-01 18:31:19,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2023-04-01 18:31:19,167 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) [2023-04-01 18:31:19,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:31:19,651 INFO L93 Difference]: Finished difference Result 145 states and 182 transitions. [2023-04-01 18:31:19,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-01 18:31:19,652 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 [2023-04-01 18:31:19,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:31:19,652 INFO L225 Difference]: With dead ends: 145 [2023-04-01 18:31:19,652 INFO L226 Difference]: Without dead ends: 102 [2023-04-01 18:31:19,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1163, Invalid=1917, Unknown=0, NotChecked=0, Total=3080 [2023-04-01 18:31:19,655 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 73 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:31:19,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 22 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:31:19,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-04-01 18:31:19,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-04-01 18:31:19,662 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) [2023-04-01 18:31:19,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2023-04-01 18:31:19,663 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 69 [2023-04-01 18:31:19,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:31:19,663 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2023-04-01 18:31:19,663 INFO L496 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) [2023-04-01 18:31:19,664 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2023-04-01 18:31:19,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-04-01 18:31:19,667 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:19,667 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:31:19,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 18:31:19,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:19,874 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:19,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:19,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1960730950, now seen corresponding path program 6 times [2023-04-01 18:31:19,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:19,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705900536] [2023-04-01 18:31:19,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:19,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:20,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-04-01 18:31:20,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:20,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705900536] [2023-04-01 18:31:20,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705900536] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:31:20,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901962029] [2023-04-01 18:31:20,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 18:31:20,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:20,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:31:20,602 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) [2023-04-01 18:31:20,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 18:31:21,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2023-04-01 18:31:21,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:31:21,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 18:31:21,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:31:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2023-04-01 18:31:21,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:31:22,109 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2023-04-01 18:31:22,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901962029] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:31:22,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:31:22,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 13, 13] total 52 [2023-04-01 18:31:22,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199604002] [2023-04-01 18:31:22,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:31:22,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-04-01 18:31:22,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:31:22,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-04-01 18:31:22,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=1969, Unknown=0, NotChecked=0, Total=2652 [2023-04-01 18:31:22,112 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) [2023-04-01 18:31:23,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:31:23,342 INFO L93 Difference]: Finished difference Result 184 states and 232 transitions. [2023-04-01 18:31:23,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-04-01 18:31:23,343 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 [2023-04-01 18:31:23,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:31:23,343 INFO L225 Difference]: With dead ends: 184 [2023-04-01 18:31:23,344 INFO L226 Difference]: Without dead ends: 141 [2023-04-01 18:31:23,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2089 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2043, Invalid=8057, Unknown=0, NotChecked=0, Total=10100 [2023-04-01 18:31:23,348 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 238 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:31:23,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 42 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:31:23,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-04-01 18:31:23,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2023-04-01 18:31:23,357 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) [2023-04-01 18:31:23,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 164 transitions. [2023-04-01 18:31:23,358 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 164 transitions. Word has length 97 [2023-04-01 18:31:23,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:31:23,358 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 164 transitions. [2023-04-01 18:31:23,359 INFO L496 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) [2023-04-01 18:31:23,359 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 164 transitions. [2023-04-01 18:31:23,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-04-01 18:31:23,360 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:23,360 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:31:23,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 18:31:23,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:23,570 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:23,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:23,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1485426532, now seen corresponding path program 7 times [2023-04-01 18:31:23,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:23,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855687179] [2023-04-01 18:31:23,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:23,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:24,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:24,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-04-01 18:31:24,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:24,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855687179] [2023-04-01 18:31:24,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855687179] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:31:24,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547555893] [2023-04-01 18:31:24,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 18:31:24,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:24,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:31:24,541 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) [2023-04-01 18:31:24,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 18:31:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:24,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 29 conjunts are in the unsatisfiable core [2023-04-01 18:31:24,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:31:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-04-01 18:31:24,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:31:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-04-01 18:31:25,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547555893] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:31:25,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:31:25,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2023-04-01 18:31:25,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827489763] [2023-04-01 18:31:25,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:31:25,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-04-01 18:31:25,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:31:25,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-04-01 18:31:25,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2023-04-01 18:31:25,677 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) [2023-04-01 18:31:27,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:31:27,136 INFO L93 Difference]: Finished difference Result 277 states and 353 transitions. [2023-04-01 18:31:27,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-04-01 18:31:27,137 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 [2023-04-01 18:31:27,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:31:27,138 INFO L225 Difference]: With dead ends: 277 [2023-04-01 18:31:27,138 INFO L226 Difference]: Without dead ends: 198 [2023-04-01 18:31:27,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5018, Invalid=8322, Unknown=0, NotChecked=0, Total=13340 [2023-04-01 18:31:27,142 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 133 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:31:27,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 32 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:31:27,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-04-01 18:31:27,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2023-04-01 18:31:27,153 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) [2023-04-01 18:31:27,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 222 transitions. [2023-04-01 18:31:27,154 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 222 transitions. Word has length 135 [2023-04-01 18:31:27,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:31:27,154 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 222 transitions. [2023-04-01 18:31:27,154 INFO L496 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) [2023-04-01 18:31:27,154 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 222 transitions. [2023-04-01 18:31:27,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-04-01 18:31:27,156 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:27,156 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:31:27,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-01 18:31:27,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 18:31:27,363 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:27,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:27,363 INFO L85 PathProgramCache]: Analyzing trace with hash 2002315338, now seen corresponding path program 8 times [2023-04-01 18:31:27,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:27,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997474420] [2023-04-01 18:31:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:27,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:29,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3851 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-04-01 18:31:29,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:29,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997474420] [2023-04-01 18:31:29,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997474420] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:31:29,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652996065] [2023-04-01 18:31:29,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:31:29,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:29,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:31:29,649 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) [2023-04-01 18:31:29,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 18:31:29,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:31:29,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:31:29,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 58 conjunts are in the unsatisfiable core [2023-04-01 18:31:29,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:31:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3851 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-04-01 18:31:29,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:31:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3851 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-04-01 18:31:33,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652996065] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:31:33,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:31:33,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 118 [2023-04-01 18:31:33,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975537130] [2023-04-01 18:31:33,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:31:33,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2023-04-01 18:31:33,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:31:33,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2023-04-01 18:31:33,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2023-04-01 18:31:33,089 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) [2023-04-01 18:31:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:31:37,598 INFO L93 Difference]: Finished difference Result 393 states and 498 transitions. [2023-04-01 18:31:37,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2023-04-01 18:31:37,599 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 [2023-04-01 18:31:37,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:31:37,600 INFO L225 Difference]: With dead ends: 393 [2023-04-01 18:31:37,600 INFO L226 Difference]: Without dead ends: 314 [2023-04-01 18:31:37,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8373 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=20127, Invalid=33465, Unknown=0, NotChecked=0, Total=53592 [2023-04-01 18:31:37,606 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 249 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:31:37,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 37 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:31:37,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-04-01 18:31:37,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 314. [2023-04-01 18:31:37,618 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) [2023-04-01 18:31:37,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 338 transitions. [2023-04-01 18:31:37,620 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 338 transitions. Word has length 193 [2023-04-01 18:31:37,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:31:37,620 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 338 transitions. [2023-04-01 18:31:37,620 INFO L496 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) [2023-04-01 18:31:37,620 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 338 transitions. [2023-04-01 18:31:37,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-04-01 18:31:37,624 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:37,624 INFO L195 NwaCegarLoop]: trace histogram [114, 114, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:31:37,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 18:31:37,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:37,830 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:37,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:37,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1717807210, now seen corresponding path program 9 times [2023-04-01 18:31:37,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:37,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728944437] [2023-04-01 18:31:37,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:37,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:45,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 13711 backedges. 0 proven. 12996 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-04-01 18:31:45,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:45,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728944437] [2023-04-01 18:31:45,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728944437] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:31:45,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237835020] [2023-04-01 18:31:45,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:31:45,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:45,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:31:45,507 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) [2023-04-01 18:31:45,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 18:31:46,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2023-04-01 18:31:46,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:31:46,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 18:31:46,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:31:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 13711 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 12996 trivial. 0 not checked. [2023-04-01 18:31:47,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:31:49,121 INFO L134 CoverageAnalysis]: Checked inductivity of 13711 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 12996 trivial. 0 not checked. [2023-04-01 18:31:49,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237835020] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:31:49,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:31:49,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 25, 25] total 164 [2023-04-01 18:31:49,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077522429] [2023-04-01 18:31:49,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:31:49,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2023-04-01 18:31:49,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:31:49,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2023-04-01 18:31:49,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7915, Invalid=18817, Unknown=0, NotChecked=0, Total=26732 [2023-04-01 18:31:49,132 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) [2023-04-01 18:31:57,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:31:57,843 INFO L93 Difference]: Finished difference Result 468 states and 564 transitions. [2023-04-01 18:31:57,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2023-04-01 18:31:57,849 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 [2023-04-01 18:31:57,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:31:57,852 INFO L225 Difference]: With dead ends: 468 [2023-04-01 18:31:57,852 INFO L226 Difference]: Without dead ends: 389 [2023-04-01 18:31:57,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 897 GetRequests, 574 SyntacticMatches, 0 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20999 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=23739, Invalid=81561, Unknown=0, NotChecked=0, Total=105300 [2023-04-01 18:31:57,861 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 636 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 18:31:57,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 47 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 18:31:57,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2023-04-01 18:31:57,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 388. [2023-04-01 18:31:57,875 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) [2023-04-01 18:31:57,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 436 transitions. [2023-04-01 18:31:57,876 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 436 transitions. Word has length 309 [2023-04-01 18:31:57,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:31:57,877 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 436 transitions. [2023-04-01 18:31:57,877 INFO L496 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) [2023-04-01 18:31:57,877 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 436 transitions. [2023-04-01 18:31:57,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2023-04-01 18:31:57,881 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:57,881 INFO L195 NwaCegarLoop]: trace histogram [115, 115, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:31:57,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 18:31:58,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 18:31:58,092 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:58,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:58,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1984644532, now seen corresponding path program 10 times [2023-04-01 18:31:58,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:58,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666611233] [2023-04-01 18:31:58,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:58,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:05,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:32:05,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:05,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16376 backedges. 0 proven. 13225 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2023-04-01 18:32:05,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:32:05,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666611233] [2023-04-01 18:32:05,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666611233] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:32:05,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770844248] [2023-04-01 18:32:05,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:32:05,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:32:05,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:32:05,566 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) [2023-04-01 18:32:05,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 18:32:05,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:32:05,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:32:05,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 1476 conjuncts, 117 conjunts are in the unsatisfiable core [2023-04-01 18:32:05,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:32:06,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16376 backedges. 0 proven. 13225 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2023-04-01 18:32:06,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:32:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16376 backedges. 0 proven. 13225 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2023-04-01 18:32:18,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770844248] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:32:18,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:32:18,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 118, 118] total 236 [2023-04-01 18:32:18,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770537904] [2023-04-01 18:32:18,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:32:18,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 236 states [2023-04-01 18:32:18,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:32:18,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 236 interpolants. [2023-04-01 18:32:18,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27497, Invalid=27963, Unknown=0, NotChecked=0, Total=55460 [2023-04-01 18:32:18,591 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) [2023-04-01 18:32:36,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:32:36,789 INFO L93 Difference]: Finished difference Result 773 states and 985 transitions. [2023-04-01 18:32:36,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2023-04-01 18:32:36,790 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 [2023-04-01 18:32:36,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:32:36,792 INFO L225 Difference]: With dead ends: 773 [2023-04-01 18:32:36,792 INFO L226 Difference]: Without dead ends: 622 [2023-04-01 18:32:36,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1117 GetRequests, 651 SyntacticMatches, 0 SemanticMatches, 466 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34156 ImplicationChecksByTransitivity, 33.1s TimeCoverageRelationStatistics Valid=82018, Invalid=136538, Unknown=0, NotChecked=0, Total=218556 [2023-04-01 18:32:36,804 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 485 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 18:32:36,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 42 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 18:32:36,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2023-04-01 18:32:36,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2023-04-01 18:32:36,825 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) [2023-04-01 18:32:36,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 670 transitions. [2023-04-01 18:32:36,827 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 670 transitions. Word has length 383 [2023-04-01 18:32:36,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:32:36,827 INFO L495 AbstractCegarLoop]: Abstraction has 622 states and 670 transitions. [2023-04-01 18:32:36,828 INFO L496 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) [2023-04-01 18:32:36,828 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 670 transitions. [2023-04-01 18:32:36,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2023-04-01 18:32:36,836 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:32:36,837 INFO L195 NwaCegarLoop]: trace histogram [232, 232, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:32:36,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 18:32:37,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 18:32:37,054 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:32:37,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:32:37,055 INFO L85 PathProgramCache]: Analyzing trace with hash 901267690, now seen corresponding path program 11 times [2023-04-01 18:32:37,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:32:37,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898702406] [2023-04-01 18:32:37,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:37,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:32:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:33:06,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:33:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:33:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 56975 backedges. 0 proven. 53824 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2023-04-01 18:33:06,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:33:06,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898702406] [2023-04-01 18:33:06,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898702406] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:33:06,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893147789] [2023-04-01 18:33:06,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:33:06,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:33:06,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:33:06,057 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) [2023-04-01 18:33:06,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process