/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_password_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 18:32:12,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 18:32:12,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 18:32:12,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 18:32:12,089 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 18:32:12,115 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 18:32:12,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 18:32:12,116 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 18:32:12,116 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 18:32:12,117 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 18:32:12,117 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 18:32:12,117 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 18:32:12,117 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 18:32:12,118 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 18:32:12,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 18:32:12,118 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 18:32:12,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 18:32:12,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 18:32:12,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 18:32:12,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 18:32:12,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 18:32:12,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 18:32:12,119 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 18:32:12,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 18:32:12,119 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 18:32:12,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 18:32:12,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 18:32:12,119 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 18:32:12,119 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 18:32:12,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:32:12,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 18:32:12,120 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 18:32:12,120 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 18:32:12,120 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 18:32:12,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 18:32:12,120 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 18:32:12,120 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 18:32:12,120 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 18:32:12,120 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 18:32:12,120 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 18:32:12,120 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 18:32:12,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 18:32:12,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 18:32:12,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 18:32:12,328 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 18:32:12,328 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 18:32:12,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_password_ground.i [2023-04-01 18:32:13,395 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 18:32:13,529 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 18:32:13,530 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_password_ground.i [2023-04-01 18:32:13,534 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/133e47668/33b9301f22c843b8a3e330436df0c8bf/FLAGe498a8d8d [2023-04-01 18:32:13,547 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/133e47668/33b9301f22c843b8a3e330436df0c8bf [2023-04-01 18:32:13,549 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 18:32:13,550 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 18:32:13,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 18:32:13,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 18:32:13,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 18:32:13,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:32:13" (1/1) ... [2023-04-01 18:32:13,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42384ce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:13, skipping insertion in model container [2023-04-01 18:32:13,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:32:13" (1/1) ... [2023-04-01 18:32:13,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 18:32:13,577 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 18:32:13,662 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_password_ground.i[817,830] [2023-04-01 18:32:13,675 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:32:13,683 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 18:32:13,691 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_password_ground.i[817,830] [2023-04-01 18:32:13,703 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:32:13,715 INFO L208 MainTranslator]: Completed translation [2023-04-01 18:32:13,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:13 WrapperNode [2023-04-01 18:32:13,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 18:32:13,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 18:32:13,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 18:32:13,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 18:32:13,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:13" (1/1) ... [2023-04-01 18:32:13,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:13" (1/1) ... [2023-04-01 18:32:13,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:13" (1/1) ... [2023-04-01 18:32:13,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:13" (1/1) ... [2023-04-01 18:32:13,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:13" (1/1) ... [2023-04-01 18:32:13,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:13" (1/1) ... [2023-04-01 18:32:13,748 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:13" (1/1) ... [2023-04-01 18:32:13,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:13" (1/1) ... [2023-04-01 18:32:13,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 18:32:13,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 18:32:13,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 18:32:13,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 18:32:13,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:13" (1/1) ... [2023-04-01 18:32:13,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:32:13,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:32:13,775 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) [2023-04-01 18:32:13,801 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 18:32:13,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 18:32:13,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 18:32:13,807 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 18:32:13,807 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 18:32:13,807 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 18:32:13,807 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 18:32:13,807 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 18:32:13,807 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 18:32:13,807 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 18:32:13,807 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 18:32:13,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 18:32:13,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 18:32:13,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 18:32:13,808 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 18:32:13,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 18:32:13,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 18:32:13,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 18:32:13,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 18:32:13,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 18:32:13,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 18:32:13,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 18:32:13,878 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 18:32:13,880 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 18:32:14,016 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 18:32:14,020 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 18:32:14,020 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 18:32:14,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:32:14 BoogieIcfgContainer [2023-04-01 18:32:14,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 18:32:14,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 18:32:14,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 18:32:14,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 18:32:14,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:32:13" (1/3) ... [2023-04-01 18:32:14,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@308d2d5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:32:14, skipping insertion in model container [2023-04-01 18:32:14,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:13" (2/3) ... [2023-04-01 18:32:14,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@308d2d5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:32:14, skipping insertion in model container [2023-04-01 18:32:14,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:32:14" (3/3) ... [2023-04-01 18:32:14,039 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_password_ground.i [2023-04-01 18:32:14,051 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 18:32:14,051 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 18:32:14,083 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 18:32:14,088 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;@454f9e1d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 18:32:14,088 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 18:32:14,092 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 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 18:32:14,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 18:32:14,116 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:32:14,117 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:32:14,117 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:32:14,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:32:14,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1666283154, now seen corresponding path program 1 times [2023-04-01 18:32:14,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:32:14,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550399763] [2023-04-01 18:32:14,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:14,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:32:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:14,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:32:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:14,265 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 18:32:14,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:32:14,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550399763] [2023-04-01 18:32:14,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550399763] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:32:14,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:32:14,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 18:32:14,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390811497] [2023-04-01 18:32:14,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:32:14,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:32:14,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:32:14,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:32:14,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:32:14,290 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 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 18:32:14,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:32:14,347 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2023-04-01 18:32:14,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:32:14,349 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 18:32:14,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:32:14,353 INFO L225 Difference]: With dead ends: 48 [2023-04-01 18:32:14,353 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 18:32:14,355 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 18:32:14,357 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:32:14,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 10 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:32:14,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 18:32:14,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-01 18:32:14,386 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 18:32:14,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-04-01 18:32:14,387 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2023-04-01 18:32:14,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:32:14,387 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-04-01 18:32:14,388 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 18:32:14,388 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-04-01 18:32:14,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 18:32:14,388 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:32:14,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:32:14,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 18:32:14,389 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:32:14,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:32:14,389 INFO L85 PathProgramCache]: Analyzing trace with hash -584096867, now seen corresponding path program 1 times [2023-04-01 18:32:14,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:32:14,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118850553] [2023-04-01 18:32:14,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:14,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:32:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:14,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:32:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:14,457 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 18:32:14,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:32:14,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118850553] [2023-04-01 18:32:14,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118850553] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:32:14,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:32:14,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:32:14,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424912437] [2023-04-01 18:32:14,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:32:14,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:32:14,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:32:14,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:32:14,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:32:14,460 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 18:32:14,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:32:14,516 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2023-04-01 18:32:14,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:32:14,517 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 18:32:14,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:32:14,518 INFO L225 Difference]: With dead ends: 43 [2023-04-01 18:32:14,518 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 18:32:14,518 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 18:32:14,519 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 30 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:32:14,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 12 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:32:14,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 18:32:14,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2023-04-01 18:32:14,524 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 18:32:14,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-04-01 18:32:14,525 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 15 [2023-04-01 18:32:14,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:32:14,525 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-04-01 18:32:14,525 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 18:32:14,526 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-04-01 18:32:14,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 18:32:14,526 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:32:14,526 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 18:32:14,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 18:32:14,526 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:32:14,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:32:14,527 INFO L85 PathProgramCache]: Analyzing trace with hash -490343336, now seen corresponding path program 1 times [2023-04-01 18:32:14,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:32:14,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576242149] [2023-04-01 18:32:14,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:14,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:32:14,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:14,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:32:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:14,663 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 18:32:14,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:32:14,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576242149] [2023-04-01 18:32:14,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576242149] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:32:14,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320000174] [2023-04-01 18:32:14,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:14,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:32:14,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:32:14,666 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 18:32:14,697 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 18:32:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:14,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 18:32:14,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:32:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:32:14,742 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 18:32:14,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320000174] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:32:14,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 18:32:14,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 18:32:14,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280257922] [2023-04-01 18:32:14,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:32:14,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:32:14,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:32:14,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:32:14,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:32:14,745 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 18:32:14,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:32:14,751 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-04-01 18:32:14,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:32:14,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 20 [2023-04-01 18:32:14,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:32:14,752 INFO L225 Difference]: With dead ends: 39 [2023-04-01 18:32:14,752 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 18:32:14,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 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 18:32:14,753 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:32:14,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 52 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:32:14,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 18:32:14,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-01 18:32:14,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 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 18:32:14,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-04-01 18:32:14,757 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2023-04-01 18:32:14,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:32:14,758 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-04-01 18:32:14,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 18:32:14,758 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-04-01 18:32:14,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 18:32:14,758 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:32:14,758 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 18:32:14,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 18:32:14,963 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 18:32:14,963 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:32:14,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:32:14,964 INFO L85 PathProgramCache]: Analyzing trace with hash 189715034, now seen corresponding path program 1 times [2023-04-01 18:32:14,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:32:14,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205046293] [2023-04-01 18:32:14,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:14,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:32:14,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:15,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:32:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:15,052 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 18:32:15,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:32:15,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205046293] [2023-04-01 18:32:15,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205046293] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:32:15,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005808008] [2023-04-01 18:32:15,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:15,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:32:15,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:32:15,059 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 18:32:15,064 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 18:32:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:15,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 18:32:15,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:32:15,136 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 18:32:15,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:32:15,165 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 18:32:15,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005808008] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:32:15,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:32:15,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 18:32:15,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296840554] [2023-04-01 18:32:15,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:32:15,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 18:32:15,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:32:15,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 18:32:15,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 18:32:15,175 INFO L87 Difference]: Start difference. First operand 25 states and 27 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 18:32:15,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:32:15,270 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2023-04-01 18:32:15,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:32:15,270 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 18:32:15,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:32:15,271 INFO L225 Difference]: With dead ends: 56 [2023-04-01 18:32:15,271 INFO L226 Difference]: Without dead ends: 40 [2023-04-01 18:32:15,271 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 18:32:15,272 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 48 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:32:15,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:32:15,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-01 18:32:15,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-04-01 18:32:15,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 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 18:32:15,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2023-04-01 18:32:15,278 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 20 [2023-04-01 18:32:15,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:32:15,278 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2023-04-01 18:32:15,278 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 18:32:15,278 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2023-04-01 18:32:15,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 18:32:15,279 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:32:15,279 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 18:32:15,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 18:32:15,484 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 18:32:15,485 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:32:15,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:32:15,485 INFO L85 PathProgramCache]: Analyzing trace with hash 145489237, now seen corresponding path program 2 times [2023-04-01 18:32:15,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:32:15,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597416493] [2023-04-01 18:32:15,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:15,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:32:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:15,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:32:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:15,621 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 18:32:15,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:32:15,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597416493] [2023-04-01 18:32:15,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597416493] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:32:15,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383784095] [2023-04-01 18:32:15,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:32:15,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:32:15,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:32:15,643 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 18:32:15,644 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 18:32:15,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:32:15,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:32:15,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 18:32:15,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:32:15,732 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 18:32:15,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:32:15,789 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 18:32:15,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383784095] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:32:15,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:32:15,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-04-01 18:32:15,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495864194] [2023-04-01 18:32:15,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:32:15,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 18:32:15,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:32:15,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 18:32:15,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2023-04-01 18:32:15,791 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 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 18:32:15,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:32:15,965 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2023-04-01 18:32:15,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 18:32:15,966 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 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 18:32:15,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:32:15,967 INFO L225 Difference]: With dead ends: 95 [2023-04-01 18:32:15,967 INFO L226 Difference]: Without dead ends: 70 [2023-04-01 18:32:15,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2023-04-01 18:32:15,968 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 108 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:32:15,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 22 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:32:15,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-04-01 18:32:15,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-04-01 18:32:15,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.046875) internal successors, (67), 64 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 18:32:15,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2023-04-01 18:32:15,975 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 35 [2023-04-01 18:32:15,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:32:15,976 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2023-04-01 18:32:15,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 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 18:32:15,976 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2023-04-01 18:32:15,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 18:32:15,977 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:32:15,977 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:32:15,983 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 18:32:16,183 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 18:32:16,183 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:32:16,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:32:16,184 INFO L85 PathProgramCache]: Analyzing trace with hash -499708951, now seen corresponding path program 3 times [2023-04-01 18:32:16,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:32:16,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933038231] [2023-04-01 18:32:16,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:16,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:32:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:16,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:32:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:16,545 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-04-01 18:32:16,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:32:16,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933038231] [2023-04-01 18:32:16,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933038231] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:32:16,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250689904] [2023-04-01 18:32:16,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:32:16,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:32:16,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:32:16,547 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 18:32:16,549 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 18:32:16,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 18:32:16,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:32:16,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-01 18:32:16,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:32:17,074 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 18:32:17,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-04-01 18:32:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-04-01 18:32:17,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:32:17,335 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-04-01 18:32:17,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-04-01 18:32:17,380 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-04-01 18:32:17,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250689904] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:32:17,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:32:17,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 28 [2023-04-01 18:32:17,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753314423] [2023-04-01 18:32:17,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:32:17,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-01 18:32:17,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:32:17,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-01 18:32:17,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2023-04-01 18:32:17,383 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:32:18,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:32:18,072 INFO L93 Difference]: Finished difference Result 129 states and 135 transitions. [2023-04-01 18:32:18,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-01 18:32:18,073 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2023-04-01 18:32:18,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:32:18,074 INFO L225 Difference]: With dead ends: 129 [2023-04-01 18:32:18,074 INFO L226 Difference]: Without dead ends: 86 [2023-04-01 18:32:18,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=684, Invalid=2622, Unknown=0, NotChecked=0, Total=3306 [2023-04-01 18:32:18,075 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 156 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:32:18,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 63 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:32:18,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-04-01 18:32:18,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2023-04-01 18:32:18,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 74 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:32:18,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2023-04-01 18:32:18,084 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 65 [2023-04-01 18:32:18,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:32:18,085 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2023-04-01 18:32:18,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:32:18,085 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2023-04-01 18:32:18,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 18:32:18,086 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:32:18,086 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:32:18,093 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 18:32:18,291 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 18:32:18,291 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:32:18,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:32:18,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1957758405, now seen corresponding path program 1 times [2023-04-01 18:32:18,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:32:18,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822299058] [2023-04-01 18:32:18,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:18,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:32:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:18,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:32:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:18,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-04-01 18:32:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:18,498 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2023-04-01 18:32:18,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:32:18,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822299058] [2023-04-01 18:32:18,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822299058] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:32:18,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195144992] [2023-04-01 18:32:18,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:18,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:32:18,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:32:18,500 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 18:32:18,502 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 18:32:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:18,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 18:32:18,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:32:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-04-01 18:32:18,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:32:18,841 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2023-04-01 18:32:18,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195144992] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:32:18,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:32:18,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2023-04-01 18:32:18,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992714445] [2023-04-01 18:32:18,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:32:18,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-01 18:32:18,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:32:18,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-01 18:32:18,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2023-04-01 18:32:18,843 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:32:19,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:32:19,319 INFO L93 Difference]: Finished difference Result 198 states and 227 transitions. [2023-04-01 18:32:19,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 18:32:19,319 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 78 [2023-04-01 18:32:19,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:32:19,321 INFO L225 Difference]: With dead ends: 198 [2023-04-01 18:32:19,321 INFO L226 Difference]: Without dead ends: 146 [2023-04-01 18:32:19,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1002, Invalid=1650, Unknown=0, NotChecked=0, Total=2652 [2023-04-01 18:32:19,323 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 272 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:32:19,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 22 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:32:19,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-04-01 18:32:19,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2023-04-01 18:32:19,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 138 states have (on average 1.0217391304347827) internal successors, (141), 139 states have internal predecessors, (141), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:32:19,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2023-04-01 18:32:19,335 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 78 [2023-04-01 18:32:19,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:32:19,335 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2023-04-01 18:32:19,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:32:19,335 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2023-04-01 18:32:19,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-04-01 18:32:19,336 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:32:19,336 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:32:19,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 18:32:19,542 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 18:32:19,542 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:32:19,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:32:19,543 INFO L85 PathProgramCache]: Analyzing trace with hash 422685348, now seen corresponding path program 2 times [2023-04-01 18:32:19,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:32:19,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319859079] [2023-04-01 18:32:19,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:19,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:32:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:20,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:32:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:20,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2023-04-01 18:32:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2023-04-01 18:32:20,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:32:20,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319859079] [2023-04-01 18:32:20,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319859079] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:32:20,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546572191] [2023-04-01 18:32:20,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:32:20,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:32:20,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:32:20,305 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 18:32:20,338 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 18:32:20,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:32:20,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:32:20,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-01 18:32:20,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:32:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 856 trivial. 0 not checked. [2023-04-01 18:32:20,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:32:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2023-04-01 18:32:21,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546572191] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:32:21,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:32:21,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2023-04-01 18:32:21,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978281669] [2023-04-01 18:32:21,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:32:21,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-04-01 18:32:21,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:32:21,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-04-01 18:32:21,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2023-04-01 18:32:21,044 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand has 54 states, 54 states have (on average 2.2777777777777777) internal successors, (123), 53 states have internal predecessors, (123), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:32:22,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:32:22,576 INFO L93 Difference]: Finished difference Result 367 states and 422 transitions. [2023-04-01 18:32:22,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-04-01 18:32:22,576 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.2777777777777777) internal successors, (123), 53 states have internal predecessors, (123), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 143 [2023-04-01 18:32:22,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:32:22,578 INFO L225 Difference]: With dead ends: 367 [2023-04-01 18:32:22,578 INFO L226 Difference]: Without dead ends: 276 [2023-04-01 18:32:22,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4031, Invalid=6681, Unknown=0, NotChecked=0, Total=10712 [2023-04-01 18:32:22,586 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 610 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:32:22,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 37 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:32:22,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2023-04-01 18:32:22,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2023-04-01 18:32:22,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 268 states have (on average 1.0111940298507462) internal successors, (271), 269 states have internal predecessors, (271), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:32:22,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 278 transitions. [2023-04-01 18:32:22,614 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 278 transitions. Word has length 143 [2023-04-01 18:32:22,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:32:22,615 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 278 transitions. [2023-04-01 18:32:22,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.2777777777777777) internal successors, (123), 53 states have internal predecessors, (123), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:32:22,615 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 278 transitions. [2023-04-01 18:32:22,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-04-01 18:32:22,623 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:32:22,623 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 50, 50, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:32:22,643 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 18:32:22,829 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 18:32:22,830 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:32:22,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:32:22,830 INFO L85 PathProgramCache]: Analyzing trace with hash -469135920, now seen corresponding path program 3 times [2023-04-01 18:32:22,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:32:22,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913719957] [2023-04-01 18:32:22,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:22,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:32:22,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:25,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:32:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:25,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 261 [2023-04-01 18:32:25,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6229 backedges. 2 proven. 2500 refuted. 0 times theorem prover too weak. 3727 trivial. 0 not checked. [2023-04-01 18:32:25,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:32:25,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913719957] [2023-04-01 18:32:25,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913719957] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:32:25,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172599320] [2023-04-01 18:32:25,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:32:25,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:32:25,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:32:25,066 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 18:32:25,081 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 18:32:25,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-01 18:32:25,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:32:25,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-01 18:32:25,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:32:26,280 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 18:32:26,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-04-01 18:32:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6229 backedges. 1 proven. 248 refuted. 0 times theorem prover too weak. 5980 trivial. 0 not checked. [2023-04-01 18:32:26,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:32:26,758 INFO L321 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-04-01 18:32:26,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2023-04-01 18:32:26,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6229 backedges. 50 proven. 199 refuted. 0 times theorem prover too weak. 5980 trivial. 0 not checked. [2023-04-01 18:32:26,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172599320] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:32:26,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:32:26,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 14, 11] total 72 [2023-04-01 18:32:26,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034270826] [2023-04-01 18:32:26,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:32:26,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-04-01 18:32:26,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:32:26,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-04-01 18:32:26,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1588, Invalid=3524, Unknown=0, NotChecked=0, Total=5112 [2023-04-01 18:32:26,818 INFO L87 Difference]: Start difference. First operand 276 states and 278 transitions. Second operand has 72 states, 71 states have (on average 2.323943661971831) internal successors, (165), 70 states have internal predecessors, (165), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:32:30,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:32:30,002 INFO L93 Difference]: Finished difference Result 463 states and 469 transitions. [2023-04-01 18:32:30,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2023-04-01 18:32:30,006 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 2.323943661971831) internal successors, (165), 70 states have internal predecessors, (165), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 273 [2023-04-01 18:32:30,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:32:30,009 INFO L225 Difference]: With dead ends: 463 [2023-04-01 18:32:30,009 INFO L226 Difference]: Without dead ends: 294 [2023-04-01 18:32:30,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 534 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8014 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=8881, Invalid=25159, Unknown=0, NotChecked=0, Total=34040 [2023-04-01 18:32:30,020 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 618 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 18:32:30,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 88 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 18:32:30,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-04-01 18:32:30,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 289. [2023-04-01 18:32:30,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 279 states have (on average 1.010752688172043) internal successors, (282), 280 states have internal predecessors, (282), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:32:30,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 291 transitions. [2023-04-01 18:32:30,056 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 291 transitions. Word has length 273 [2023-04-01 18:32:30,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:32:30,057 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 291 transitions. [2023-04-01 18:32:30,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 2.323943661971831) internal successors, (165), 70 states have internal predecessors, (165), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:32:30,057 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 291 transitions. [2023-04-01 18:32:30,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-04-01 18:32:30,059 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:32:30,059 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 51, 51, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:32:30,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-01 18:32:30,264 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 18:32:30,265 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:32:30,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:32:30,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1751369396, now seen corresponding path program 4 times [2023-04-01 18:32:30,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:32:30,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405533801] [2023-04-01 18:32:30,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:30,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:32:30,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:32,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:32:32,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:32,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2023-04-01 18:32:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:32,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2023-04-01 18:32:32,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6493 backedges. 4 proven. 2601 refuted. 0 times theorem prover too weak. 3888 trivial. 0 not checked. [2023-04-01 18:32:32,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:32:32,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405533801] [2023-04-01 18:32:32,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405533801] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:32:32,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748328934] [2023-04-01 18:32:32,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:32:32,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:32:32,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:32:32,445 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 18:32:32,446 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 18:32:32,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:32:32,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:32:32,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 1448 conjuncts, 53 conjunts are in the unsatisfiable core [2023-04-01 18:32:32,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:32:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6493 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 2617 trivial. 0 not checked. [2023-04-01 18:32:32,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:32:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6493 backedges. 4 proven. 3876 refuted. 0 times theorem prover too weak. 2613 trivial. 0 not checked. [2023-04-01 18:32:34,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748328934] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:32:34,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:32:34,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 108 [2023-04-01 18:32:34,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022515949] [2023-04-01 18:32:34,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:32:34,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2023-04-01 18:32:34,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:32:34,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2023-04-01 18:32:34,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2023-04-01 18:32:34,965 INFO L87 Difference]: Start difference. First operand 289 states and 291 transitions. Second operand has 108 states, 108 states have (on average 4.055555555555555) internal successors, (438), 107 states have internal predecessors, (438), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:32:38,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:32:38,940 INFO L93 Difference]: Finished difference Result 734 states and 843 transitions. [2023-04-01 18:32:38,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-04-01 18:32:38,940 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 4.055555555555555) internal successors, (438), 107 states have internal predecessors, (438), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 286 [2023-04-01 18:32:38,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:32:38,942 INFO L225 Difference]: With dead ends: 734 [2023-04-01 18:32:38,942 INFO L226 Difference]: Without dead ends: 554 [2023-04-01 18:32:38,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 839 GetRequests, 629 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6988 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=16802, Invalid=27930, Unknown=0, NotChecked=0, Total=44732 [2023-04-01 18:32:38,948 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 753 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 18:32:38,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 32 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 18:32:38,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2023-04-01 18:32:38,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2023-04-01 18:32:38,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 544 states have (on average 1.005514705882353) internal successors, (547), 545 states have internal predecessors, (547), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:32:38,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 556 transitions. [2023-04-01 18:32:38,992 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 556 transitions. Word has length 286 [2023-04-01 18:32:38,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:32:38,993 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 556 transitions. [2023-04-01 18:32:38,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 4.055555555555555) internal successors, (438), 107 states have internal predecessors, (438), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:32:38,993 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 556 transitions. [2023-04-01 18:32:38,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2023-04-01 18:32:38,999 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:32:38,999 INFO L195 NwaCegarLoop]: trace histogram [104, 104, 104, 104, 104, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:32:39,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 18:32:39,203 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 18:32:39,203 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:32:39,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:32:39,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1040502085, now seen corresponding path program 5 times [2023-04-01 18:32:39,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:32:39,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667315698] [2023-04-01 18:32:39,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:39,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:32:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:46,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:32:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:46,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 531 [2023-04-01 18:32:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:46,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 539 [2023-04-01 18:32:46,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:47,000 INFO L134 CoverageAnalysis]: Checked inductivity of 27004 backedges. 4 proven. 10816 refuted. 0 times theorem prover too weak. 16184 trivial. 0 not checked. [2023-04-01 18:32:47,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:32:47,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667315698] [2023-04-01 18:32:47,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667315698] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:32:47,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841263760] [2023-04-01 18:32:47,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:32:47,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:32:47,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:32:47,002 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 18:32:47,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process