/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_copyInit_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:07:38,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:07:38,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:07:38,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 22:07:38,117 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 22:07:38,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 22:07:38,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 22:07:38,118 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 [2023-03-30 22:07:38,153 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:07:38,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:07:38,153 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:07:38,153 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:07:38,153 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:07:38,154 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:07:38,154 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:07:38,154 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:07:38,154 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:07:38,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:07:38,154 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:07:38,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:07:38,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:07:38,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:07:38,155 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:07:38,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:07:38,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:07:38,155 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:07:38,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:07:38,155 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:07:38,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:07:38,155 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:07:38,155 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:07:38,155 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:07:38,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:07:38,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:07:38,156 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:07:38,156 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:07:38,156 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:07:38,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:07:38,156 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:07:38,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:07:38,156 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:07:38,156 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:07:38,156 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:07:38,156 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:07:38,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:07:38,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:07:38,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:07:38,346 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:07:38,347 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:07:38,348 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copyInit_ground.i [2023-03-30 22:07:39,341 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:07:39,509 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:07:39,509 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copyInit_ground.i [2023-03-30 22:07:39,513 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db178c801/ddfff235a6014b9f974b3932868ec1cd/FLAG9a32e964f [2023-03-30 22:07:39,533 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db178c801/ddfff235a6014b9f974b3932868ec1cd [2023-03-30 22:07:39,535 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:07:39,536 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:07:39,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:07:39,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:07:39,548 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:07:39,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:07:39" (1/1) ... [2023-03-30 22:07:39,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@448dfcc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:07:39, skipping insertion in model container [2023-03-30 22:07:39,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:07:39" (1/1) ... [2023-03-30 22:07:39,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:07:39,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:07:39,680 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_copyInit_ground.i[817,830] [2023-03-30 22:07:39,690 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:07:39,699 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:07:39,707 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_copyInit_ground.i[817,830] [2023-03-30 22:07:39,714 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:07:39,722 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:07:39,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:07:39 WrapperNode [2023-03-30 22:07:39,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:07:39,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:07:39,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:07:39,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:07:39,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:07:39" (1/1) ... [2023-03-30 22:07:39,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:07:39" (1/1) ... [2023-03-30 22:07:39,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:07:39" (1/1) ... [2023-03-30 22:07:39,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:07:39" (1/1) ... [2023-03-30 22:07:39,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:07:39" (1/1) ... [2023-03-30 22:07:39,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:07:39" (1/1) ... [2023-03-30 22:07:39,745 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:07:39" (1/1) ... [2023-03-30 22:07:39,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:07:39" (1/1) ... [2023-03-30 22:07:39,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:07:39,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:07:39,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:07:39,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:07:39,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:07:39" (1/1) ... [2023-03-30 22:07:39,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:07:39,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:07:39,775 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) [2023-03-30 22:07:39,786 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 [2023-03-30 22:07:39,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:07:39,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:07:39,821 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:07:39,821 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-30 22:07:39,821 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:07:39,821 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:07:39,822 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:07:39,822 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-30 22:07:39,822 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-30 22:07:39,822 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:07:39,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:07:39,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-30 22:07:39,825 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:07:39,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-30 22:07:39,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:07:39,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:07:39,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:07:39,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:07:39,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:07:39,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:07:39,873 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:07:39,874 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:07:39,976 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:07:39,980 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:07:39,980 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-30 22:07:39,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:07:39 BoogieIcfgContainer [2023-03-30 22:07:39,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:07:39,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:07:39,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:07:39,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:07:39,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:07:39" (1/3) ... [2023-03-30 22:07:39,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6466086b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:07:39, skipping insertion in model container [2023-03-30 22:07:39,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:07:39" (2/3) ... [2023-03-30 22:07:39,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6466086b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:07:39, skipping insertion in model container [2023-03-30 22:07:39,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:07:39" (3/3) ... [2023-03-30 22:07:39,987 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copyInit_ground.i [2023-03-30 22:07:39,998 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:07:39,998 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:07:40,039 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:07:40,043 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;@37403b4b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:07:40,044 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:07:40,046 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 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) [2023-03-30 22:07:40,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-03-30 22:07:40,051 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:07:40,051 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:07:40,052 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:07:40,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:07:40,055 INFO L85 PathProgramCache]: Analyzing trace with hash -906325315, now seen corresponding path program 1 times [2023-03-30 22:07:40,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:07:40,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238526336] [2023-03-30 22:07:40,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:07:40,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:07:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:40,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:07:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:07:40,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:07:40,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238526336] [2023-03-30 22:07:40,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238526336] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:07:40,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:07:40,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:07:40,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632916745] [2023-03-30 22:07:40,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:07:40,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:07:40,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:07:40,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:07:40,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:07:40,297 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 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) [2023-03-30 22:07:40,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:07:40,359 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2023-03-30 22:07:40,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:07:40,361 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 [2023-03-30 22:07:40,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:07:40,366 INFO L225 Difference]: With dead ends: 45 [2023-03-30 22:07:40,366 INFO L226 Difference]: Without dead ends: 21 [2023-03-30 22:07:40,368 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 [2023-03-30 22:07:40,371 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:07:40,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 10 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:07:40,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-03-30 22:07:40,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-03-30 22:07:40,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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) [2023-03-30 22:07:40,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-03-30 22:07:40,395 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2023-03-30 22:07:40,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:07:40,395 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-03-30 22:07:40,395 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) [2023-03-30 22:07:40,395 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-03-30 22:07:40,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-03-30 22:07:40,396 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:07:40,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:07:40,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:07:40,396 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:07:40,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:07:40,397 INFO L85 PathProgramCache]: Analyzing trace with hash 998470451, now seen corresponding path program 1 times [2023-03-30 22:07:40,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:07:40,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501643032] [2023-03-30 22:07:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:07:40,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:07:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:40,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:07:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:07:40,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:07:40,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501643032] [2023-03-30 22:07:40,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501643032] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:07:40,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:07:40,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 22:07:40,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527221675] [2023-03-30 22:07:40,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:07:40,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:07:40,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:07:40,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:07:40,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:07:40,467 INFO L87 Difference]: Start difference. First operand 21 states and 23 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) [2023-03-30 22:07:40,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:07:40,535 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2023-03-30 22:07:40,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 22:07:40,536 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 [2023-03-30 22:07:40,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:07:40,536 INFO L225 Difference]: With dead ends: 38 [2023-03-30 22:07:40,536 INFO L226 Difference]: Without dead ends: 24 [2023-03-30 22:07:40,540 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 [2023-03-30 22:07:40,544 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:07:40,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 12 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:07:40,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-03-30 22:07:40,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2023-03-30 22:07:40,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2023-03-30 22:07:40,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-03-30 22:07:40,556 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2023-03-30 22:07:40,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:07:40,556 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-03-30 22:07:40,556 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) [2023-03-30 22:07:40,556 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-03-30 22:07:40,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-30 22:07:40,557 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:07:40,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:07:40,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:07:40,557 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:07:40,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:07:40,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1344363681, now seen corresponding path program 1 times [2023-03-30 22:07:40,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:07:40,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031029135] [2023-03-30 22:07:40,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:07:40,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:07:40,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:40,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:07:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:07:40,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:07:40,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031029135] [2023-03-30 22:07:40,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031029135] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:07:40,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841827189] [2023-03-30 22:07:40,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:07:40,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:07:40,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:07:40,697 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) [2023-03-30 22:07:40,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 22:07:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:40,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-30 22:07:40,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:07:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:07:40,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:07:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:07:40,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841827189] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:07:40,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:07:40,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-03-30 22:07:40,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996838170] [2023-03-30 22:07:40,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:07:40,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 22:07:40,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:07:40,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 22:07:40,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:07:40,875 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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) [2023-03-30 22:07:40,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:07:40,983 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2023-03-30 22:07:40,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 22:07:40,983 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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 18 [2023-03-30 22:07:40,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:07:40,985 INFO L225 Difference]: With dead ends: 47 [2023-03-30 22:07:40,985 INFO L226 Difference]: Without dead ends: 32 [2023-03-30 22:07:40,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:07:40,987 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:07:40,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 22 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:07:40,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-03-30 22:07:41,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-03-30 22:07:41,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 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) [2023-03-30 22:07:41,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-03-30 22:07:41,004 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 18 [2023-03-30 22:07:41,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:07:41,004 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-03-30 22:07:41,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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) [2023-03-30 22:07:41,004 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-03-30 22:07:41,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-30 22:07:41,005 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:07:41,005 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:07:41,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 22:07:41,210 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 [2023-03-30 22:07:41,210 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:07:41,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:07:41,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1841475883, now seen corresponding path program 2 times [2023-03-30 22:07:41,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:07:41,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398257054] [2023-03-30 22:07:41,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:07:41,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:07:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:41,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:07:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:41,378 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-30 22:07:41,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:07:41,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398257054] [2023-03-30 22:07:41,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398257054] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:07:41,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16334424] [2023-03-30 22:07:41,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:07:41,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:07:41,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:07:41,383 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) [2023-03-30 22:07:41,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 22:07:41,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:07:41,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:07:41,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:07:41,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:07:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-30 22:07:41,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:07:41,498 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-30 22:07:41,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16334424] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:07:41,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:07:41,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-03-30 22:07:41,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436265844] [2023-03-30 22:07:41,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:07:41,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-30 22:07:41,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:07:41,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-30 22:07:41,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2023-03-30 22:07:41,500 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2023-03-30 22:07:41,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:07:41,647 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2023-03-30 22:07:41,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 22:07:41,648 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 27 [2023-03-30 22:07:41,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:07:41,648 INFO L225 Difference]: With dead ends: 71 [2023-03-30 22:07:41,649 INFO L226 Difference]: Without dead ends: 50 [2023-03-30 22:07:41,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2023-03-30 22:07:41,649 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 65 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:07:41,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 27 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:07:41,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-03-30 22:07:41,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-03-30 22:07:41,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 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) [2023-03-30 22:07:41,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2023-03-30 22:07:41,670 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 27 [2023-03-30 22:07:41,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:07:41,670 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2023-03-30 22:07:41,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2023-03-30 22:07:41,670 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2023-03-30 22:07:41,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-30 22:07:41,671 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:07:41,671 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:07:41,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 22:07:41,875 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 [2023-03-30 22:07:41,876 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:07:41,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:07:41,876 INFO L85 PathProgramCache]: Analyzing trace with hash 404786463, now seen corresponding path program 3 times [2023-03-30 22:07:41,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:07:41,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025710241] [2023-03-30 22:07:41,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:07:41,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:07:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:42,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:07:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-03-30 22:07:42,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:07:42,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025710241] [2023-03-30 22:07:42,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025710241] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:07:42,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873208025] [2023-03-30 22:07:42,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:07:42,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:07:42,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:07:42,136 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) [2023-03-30 22:07:42,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 22:07:42,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-03-30 22:07:42,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:07:42,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-30 22:07:42,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:07:42,317 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-03-30 22:07:42,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:07:42,486 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-03-30 22:07:42,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873208025] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:07:42,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:07:42,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-03-30 22:07:42,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368297051] [2023-03-30 22:07:42,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:07:42,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-03-30 22:07:42,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:07:42,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-03-30 22:07:42,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-03-30 22:07:42,490 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 25 states have internal predecessors, (38), 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) [2023-03-30 22:07:42,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:07:42,866 INFO L93 Difference]: Finished difference Result 119 states and 146 transitions. [2023-03-30 22:07:42,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-03-30 22:07:42,868 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 25 states have internal predecessors, (38), 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 45 [2023-03-30 22:07:42,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:07:42,871 INFO L225 Difference]: With dead ends: 119 [2023-03-30 22:07:42,871 INFO L226 Difference]: Without dead ends: 86 [2023-03-30 22:07:42,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2023-03-30 22:07:42,873 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 132 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:07:42,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 42 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:07:42,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-03-30 22:07:42,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-03-30 22:07:42,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 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) [2023-03-30 22:07:42,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2023-03-30 22:07:42,889 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 45 [2023-03-30 22:07:42,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:07:42,889 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2023-03-30 22:07:42,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 25 states have internal predecessors, (38), 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) [2023-03-30 22:07:42,890 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2023-03-30 22:07:42,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-03-30 22:07:42,893 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:07:42,893 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:07:42,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 22:07:43,097 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 [2023-03-30 22:07:43,097 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:07:43,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:07:43,098 INFO L85 PathProgramCache]: Analyzing trace with hash 782818055, now seen corresponding path program 4 times [2023-03-30 22:07:43,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:07:43,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979803263] [2023-03-30 22:07:43,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:07:43,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:07:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:43,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:07:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:43,597 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-03-30 22:07:43,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:07:43,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979803263] [2023-03-30 22:07:43,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979803263] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:07:43,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749332538] [2023-03-30 22:07:43,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-30 22:07:43,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:07:43,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:07:43,599 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) [2023-03-30 22:07:43,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 22:07:43,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-30 22:07:43,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:07:43,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 24 conjunts are in the unsatisfiable core [2023-03-30 22:07:43,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:07:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-03-30 22:07:43,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:07:44,350 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-03-30 22:07:44,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749332538] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:07:44,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:07:44,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2023-03-30 22:07:44,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846654627] [2023-03-30 22:07:44,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:07:44,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-03-30 22:07:44,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:07:44,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-03-30 22:07:44,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2023-03-30 22:07:44,353 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 50 states, 50 states have (on average 2.62) internal successors, (131), 49 states have internal predecessors, (131), 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) [2023-03-30 22:07:45,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:07:45,393 INFO L93 Difference]: Finished difference Result 215 states and 266 transitions. [2023-03-30 22:07:45,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-03-30 22:07:45,394 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.62) internal successors, (131), 49 states have internal predecessors, (131), 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 81 [2023-03-30 22:07:45,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:07:45,395 INFO L225 Difference]: With dead ends: 215 [2023-03-30 22:07:45,395 INFO L226 Difference]: Without dead ends: 158 [2023-03-30 22:07:45,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2023-03-30 22:07:45,398 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 157 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:07:45,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 37 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:07:45,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-03-30 22:07:45,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2023-03-30 22:07:45,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 states have internal predecessors, (155), 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) [2023-03-30 22:07:45,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2023-03-30 22:07:45,408 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 81 [2023-03-30 22:07:45,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:07:45,408 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2023-03-30 22:07:45,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.62) internal successors, (131), 49 states have internal predecessors, (131), 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) [2023-03-30 22:07:45,408 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2023-03-30 22:07:45,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-03-30 22:07:45,409 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:07:45,410 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:07:45,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 22:07:45,614 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 [2023-03-30 22:07:45,614 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:07:45,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:07:45,615 INFO L85 PathProgramCache]: Analyzing trace with hash -646459689, now seen corresponding path program 5 times [2023-03-30 22:07:45,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:07:45,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898805158] [2023-03-30 22:07:45,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:07:45,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:07:45,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:47,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:07:47,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:47,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2023-03-30 22:07:47,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:07:47,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898805158] [2023-03-30 22:07:47,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898805158] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:07:47,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669225581] [2023-03-30 22:07:47,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-30 22:07:47,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:07:47,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:07:47,161 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) [2023-03-30 22:07:47,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process