/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-industry-pattern/array_shadowinit.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:13:27,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:13:27,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:13:27,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 22:13:27,187 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 22:13:27,213 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:13:27,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:13:27,214 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:13:27,214 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:13:27,214 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:13:27,214 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:13:27,215 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:13:27,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:13:27,215 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:13:27,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:13:27,215 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:13:27,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:13:27,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:13:27,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:13:27,216 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:13:27,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:13:27,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:13:27,216 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:13:27,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:13:27,216 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:13:27,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:13:27,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:13:27,217 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:13:27,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:13:27,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:13:27,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:13:27,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:13:27,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:13:27,218 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:13:27,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:13:27,218 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:13:27,218 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:13:27,218 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:13:27,218 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:13:27,218 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:13:27,219 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:13:27,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:13:27,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:13:27,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:13:27,470 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:13:27,470 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:13:27,471 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_shadowinit.i [2023-03-30 22:13:28,578 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:13:28,761 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:13:28,761 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_shadowinit.i [2023-03-30 22:13:28,766 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd9a3d7ec/b84ac9bcff3e4e1ea083fa298d5b1bee/FLAGd22176e48 [2023-03-30 22:13:28,780 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd9a3d7ec/b84ac9bcff3e4e1ea083fa298d5b1bee [2023-03-30 22:13:28,782 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:13:28,783 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:13:28,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:13:28,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:13:28,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:13:28,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:13:28" (1/1) ... [2023-03-30 22:13:28,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27a015b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:13:28, skipping insertion in model container [2023-03-30 22:13:28,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:13:28" (1/1) ... [2023-03-30 22:13:28,794 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:13:28,807 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:13:28,904 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-industry-pattern/array_shadowinit.i[809,822] [2023-03-30 22:13:28,914 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:13:28,921 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:13:28,928 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-industry-pattern/array_shadowinit.i[809,822] [2023-03-30 22:13:28,932 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:13:28,942 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:13:28,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:13:28 WrapperNode [2023-03-30 22:13:28,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:13:28,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:13:28,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:13:28,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:13:28,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:13:28" (1/1) ... [2023-03-30 22:13:28,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:13:28" (1/1) ... [2023-03-30 22:13:28,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:13:28" (1/1) ... [2023-03-30 22:13:28,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:13:28" (1/1) ... [2023-03-30 22:13:28,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:13:28" (1/1) ... [2023-03-30 22:13:28,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:13:28" (1/1) ... [2023-03-30 22:13:28,971 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:13:28" (1/1) ... [2023-03-30 22:13:28,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:13:28" (1/1) ... [2023-03-30 22:13:28,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:13:28,974 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:13:28,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:13:28,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:13:28,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:13:28" (1/1) ... [2023-03-30 22:13:28,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:13:28,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:13:29,000 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 22:13:29,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 22:13:29,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:13:29,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:13:29,027 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:13:29,028 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-30 22:13:29,028 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:13:29,028 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:13:29,028 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:13:29,028 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-30 22:13:29,028 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-30 22:13:29,028 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:13:29,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:13:29,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-30 22:13:29,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:13:29,029 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:13:29,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-30 22:13:29,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:13:29,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:13:29,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:13:29,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:13:29,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:13:29,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:13:29,089 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:13:29,091 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:13:29,185 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:13:29,190 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:13:29,190 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-30 22:13:29,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:13:29 BoogieIcfgContainer [2023-03-30 22:13:29,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:13:29,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:13:29,194 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:13:29,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:13:29,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:13:28" (1/3) ... [2023-03-30 22:13:29,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@407bff4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:13:29, skipping insertion in model container [2023-03-30 22:13:29,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:13:28" (2/3) ... [2023-03-30 22:13:29,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@407bff4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:13:29, skipping insertion in model container [2023-03-30 22:13:29,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:13:29" (3/3) ... [2023-03-30 22:13:29,199 INFO L112 eAbstractionObserver]: Analyzing ICFG array_shadowinit.i [2023-03-30 22:13:29,215 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:13:29,215 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:13:29,280 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:13:29,300 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;@1a4f0682, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:13:29,301 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:13:29,304 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:13:29,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-30 22:13:29,310 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:29,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:29,311 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:29,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:29,316 INFO L85 PathProgramCache]: Analyzing trace with hash -435628017, now seen corresponding path program 1 times [2023-03-30 22:13:29,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:29,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993761941] [2023-03-30 22:13:29,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:29,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:29,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:29,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:13:29,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:29,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993761941] [2023-03-30 22:13:29,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993761941] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:13:29,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:13:29,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 22:13:29,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906351450] [2023-03-30 22:13:29,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:13:29,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:13:29,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:13:29,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:13:29,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:13:29,661 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:13:29,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:13:29,737 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2023-03-30 22:13:29,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 22:13:29,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2023-03-30 22:13:29,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:13:29,745 INFO L225 Difference]: With dead ends: 41 [2023-03-30 22:13:29,746 INFO L226 Difference]: Without dead ends: 19 [2023-03-30 22:13:29,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:13:29,751 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:13:29,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 32 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:13:29,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-03-30 22:13:29,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-03-30 22:13:29,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:13:29,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-03-30 22:13:29,789 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2023-03-30 22:13:29,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:13:29,790 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-03-30 22:13:29,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:13:29,790 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-03-30 22:13:29,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-03-30 22:13:29,791 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:29,791 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:29,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:13:29,792 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:29,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:29,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1552803104, now seen corresponding path program 1 times [2023-03-30 22:13:29,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:29,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913448016] [2023-03-30 22:13:29,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:29,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:30,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:13:30,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:30,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913448016] [2023-03-30 22:13:30,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913448016] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:13:30,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682533012] [2023-03-30 22:13:30,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:30,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:30,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:13:30,301 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:13:30,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 22:13:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:30,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2023-03-30 22:13:30,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:13:30,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:13:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:13:30,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:13:30,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-03-30 22:13:30,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-03-30 22:13:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:13:30,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682533012] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:13:30,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:13:30,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2023-03-30 22:13:30,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021273479] [2023-03-30 22:13:30,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:13:30,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-30 22:13:30,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:13:30,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-30 22:13:30,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-03-30 22:13:30,670 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:13:30,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:13:30,832 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2023-03-30 22:13:30,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-30 22:13:30,832 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (6), 4 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 15 [2023-03-30 22:13:30,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:13:30,833 INFO L225 Difference]: With dead ends: 28 [2023-03-30 22:13:30,833 INFO L226 Difference]: Without dead ends: 26 [2023-03-30 22:13:30,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-03-30 22:13:30,837 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:13:30,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 58 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:13:30,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-03-30 22:13:30,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-03-30 22:13:30,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 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) [2023-03-30 22:13:30,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-03-30 22:13:30,851 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 15 [2023-03-30 22:13:30,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:13:30,852 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-03-30 22:13:30,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:13:30,852 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-03-30 22:13:30,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-30 22:13:30,853 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:30,853 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:30,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-30 22:13:31,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:31,059 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:31,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:31,059 INFO L85 PathProgramCache]: Analyzing trace with hash 127400626, now seen corresponding path program 1 times [2023-03-30 22:13:31,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:31,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314350037] [2023-03-30 22:13:31,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:31,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:31,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:31,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-03-30 22:13:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:13:31,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:31,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314350037] [2023-03-30 22:13:31,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314350037] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:13:31,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167388864] [2023-03-30 22:13:31,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:31,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:31,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:13:31,199 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:13:31,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 22:13:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:31,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:13:31,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:13:31,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:13:31,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:13:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:13:31,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167388864] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:13:31,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:13:31,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2023-03-30 22:13:31,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891096459] [2023-03-30 22:13:31,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:13:31,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 22:13:31,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:13:31,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 22:13:31,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:13:31,380 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:13:31,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:13:31,488 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2023-03-30 22:13:31,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 22:13:31,489 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2023-03-30 22:13:31,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:13:31,490 INFO L225 Difference]: With dead ends: 48 [2023-03-30 22:13:31,490 INFO L226 Difference]: Without dead ends: 30 [2023-03-30 22:13:31,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-03-30 22:13:31,492 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:13:31,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:13:31,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-03-30 22:13:31,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2023-03-30 22:13:31,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 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) [2023-03-30 22:13:31,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-03-30 22:13:31,501 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2023-03-30 22:13:31,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:13:31,501 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-03-30 22:13:31,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:13:31,502 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-03-30 22:13:31,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-30 22:13:31,503 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:31,503 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:31,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 22:13:31,708 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,SelfDestructingSolverStorable2 [2023-03-30 22:13:31,709 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:31,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:31,709 INFO L85 PathProgramCache]: Analyzing trace with hash 2068539075, now seen corresponding path program 2 times [2023-03-30 22:13:31,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:31,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389771733] [2023-03-30 22:13:31,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:31,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:31,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:31,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-03-30 22:13:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:31,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:13:31,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:31,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389771733] [2023-03-30 22:13:31,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389771733] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:13:31,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088474724] [2023-03-30 22:13:31,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:13:31,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:31,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:13:31,982 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:13:31,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 22:13:32,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:13:32,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:13:32,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2023-03-30 22:13:32,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:13:32,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:13:32,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:13:32,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:13:32,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-03-30 22:13:32,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-03-30 22:13:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:13:32,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088474724] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:13:32,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:13:32,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2023-03-30 22:13:32,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878007591] [2023-03-30 22:13:32,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:13:32,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-03-30 22:13:32,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:13:32,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-03-30 22:13:32,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2023-03-30 22:13:32,357 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 22 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 6 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) [2023-03-30 22:13:32,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:13:32,560 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2023-03-30 22:13:32,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 22:13:32,560 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 6 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 23 [2023-03-30 22:13:32,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:13:32,561 INFO L225 Difference]: With dead ends: 36 [2023-03-30 22:13:32,561 INFO L226 Difference]: Without dead ends: 34 [2023-03-30 22:13:32,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2023-03-30 22:13:32,562 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:13:32,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 69 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:13:32,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-03-30 22:13:32,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2023-03-30 22:13:32,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 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) [2023-03-30 22:13:32,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-03-30 22:13:32,569 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 23 [2023-03-30 22:13:32,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:13:32,569 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-03-30 22:13:32,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 6 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) [2023-03-30 22:13:32,570 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-03-30 22:13:32,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-03-30 22:13:32,570 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:32,570 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:32,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 22:13:32,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:32,776 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:32,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:32,777 INFO L85 PathProgramCache]: Analyzing trace with hash -432608337, now seen corresponding path program 3 times [2023-03-30 22:13:32,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:32,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653301939] [2023-03-30 22:13:32,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:32,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:32,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:32,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:32,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-03-30 22:13:32,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:32,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-03-30 22:13:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:32,881 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:13:32,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:32,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653301939] [2023-03-30 22:13:32,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653301939] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:13:32,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100221560] [2023-03-30 22:13:32,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:13:32,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:32,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:13:32,883 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:13:32,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 22:13:32,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-30 22:13:32,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:13:32,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 22:13:32,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:13:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:13:33,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:13:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:13:33,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100221560] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:13:33,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:13:33,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2023-03-30 22:13:33,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86187647] [2023-03-30 22:13:33,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:13:33,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-30 22:13:33,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:13:33,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-30 22:13:33,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-03-30 22:13:33,093 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 22:13:33,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:13:33,208 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2023-03-30 22:13:33,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 22:13:33,208 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 30 [2023-03-30 22:13:33,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:13:33,209 INFO L225 Difference]: With dead ends: 63 [2023-03-30 22:13:33,209 INFO L226 Difference]: Without dead ends: 38 [2023-03-30 22:13:33,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2023-03-30 22:13:33,210 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:13:33,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 24 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:13:33,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-03-30 22:13:33,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2023-03-30 22:13:33,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 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) [2023-03-30 22:13:33,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2023-03-30 22:13:33,221 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2023-03-30 22:13:33,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:13:33,221 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2023-03-30 22:13:33,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 22:13:33,221 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2023-03-30 22:13:33,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-03-30 22:13:33,222 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:33,222 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:33,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 22:13:33,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:33,428 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:33,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:33,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1370900800, now seen corresponding path program 4 times [2023-03-30 22:13:33,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:33,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491088579] [2023-03-30 22:13:33,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:33,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:33,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:33,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-03-30 22:13:33,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:33,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-03-30 22:13:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:13:33,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:33,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491088579] [2023-03-30 22:13:33,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491088579] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:13:33,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864178774] [2023-03-30 22:13:33,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-30 22:13:33,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:33,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:13:33,838 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:13:33,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 22:13:33,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-30 22:13:33,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:13:33,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 29 conjunts are in the unsatisfiable core [2023-03-30 22:13:33,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:13:33,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-03-30 22:13:34,127 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-03-30 22:13:34,127 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 21 treesize of output 10 [2023-03-30 22:13:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:13:34,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:13:34,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-03-30 22:13:34,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-03-30 22:13:34,329 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:13:34,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864178774] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:13:34,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:13:34,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 12] total 22 [2023-03-30 22:13:34,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749182497] [2023-03-30 22:13:34,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:13:34,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-03-30 22:13:34,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:13:34,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-03-30 22:13:34,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2023-03-30 22:13:34,332 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 22 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 7 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-03-30 22:13:34,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:13:34,753 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2023-03-30 22:13:34,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-03-30 22:13:34,754 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 7 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 31 [2023-03-30 22:13:34,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:13:34,754 INFO L225 Difference]: With dead ends: 44 [2023-03-30 22:13:34,754 INFO L226 Difference]: Without dead ends: 42 [2023-03-30 22:13:34,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 52 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2023-03-30 22:13:34,755 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:13:34,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 98 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:13:34,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-03-30 22:13:34,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2023-03-30 22:13:34,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-30 22:13:34,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2023-03-30 22:13:34,764 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 31 [2023-03-30 22:13:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:13:34,764 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2023-03-30 22:13:34,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 7 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-03-30 22:13:34,765 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2023-03-30 22:13:34,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-03-30 22:13:34,765 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:34,765 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:34,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 22:13:34,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:34,966 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:34,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:34,967 INFO L85 PathProgramCache]: Analyzing trace with hash 534451474, now seen corresponding path program 5 times [2023-03-30 22:13:34,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:34,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086719103] [2023-03-30 22:13:34,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:34,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:34,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:35,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:35,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-03-30 22:13:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:35,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-03-30 22:13:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:35,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-03-30 22:13:35,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:35,102 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-30 22:13:35,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:35,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086719103] [2023-03-30 22:13:35,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086719103] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:13:35,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757371848] [2023-03-30 22:13:35,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-30 22:13:35,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:35,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:13:35,103 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) [2023-03-30 22:13:35,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 22:13:35,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-03-30 22:13:35,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:13:35,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2023-03-30 22:13:35,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:13:35,275 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-30 22:13:35,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:13:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-30 22:13:35,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757371848] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:13:35,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:13:35,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2023-03-30 22:13:35,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302335767] [2023-03-30 22:13:35,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:13:35,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-03-30 22:13:35,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:13:35,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-03-30 22:13:35,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-03-30 22:13:35,352 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-30 22:13:35,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:13:35,511 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2023-03-30 22:13:35,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-30 22:13:35,512 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 38 [2023-03-30 22:13:35,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:13:35,515 INFO L225 Difference]: With dead ends: 78 [2023-03-30 22:13:35,515 INFO L226 Difference]: Without dead ends: 46 [2023-03-30 22:13:35,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2023-03-30 22:13:35,516 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:13:35,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 30 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:13:35,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-03-30 22:13:35,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2023-03-30 22:13:35,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-30 22:13:35,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2023-03-30 22:13:35,527 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 38 [2023-03-30 22:13:35,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:13:35,527 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2023-03-30 22:13:35,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-30 22:13:35,527 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2023-03-30 22:13:35,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-03-30 22:13:35,528 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:35,528 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:35,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-30 22:13:35,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:35,733 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:35,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:35,734 INFO L85 PathProgramCache]: Analyzing trace with hash -763478237, now seen corresponding path program 6 times [2023-03-30 22:13:35,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:35,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691574954] [2023-03-30 22:13:35,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:35,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:36,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:36,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-03-30 22:13:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:36,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-03-30 22:13:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:36,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-03-30 22:13:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:36,030 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-30 22:13:36,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:36,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691574954] [2023-03-30 22:13:36,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691574954] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:13:36,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913758956] [2023-03-30 22:13:36,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-03-30 22:13:36,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:36,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:13:36,032 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) [2023-03-30 22:13:36,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-30 22:13:36,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-03-30 22:13:36,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:13:36,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 35 conjunts are in the unsatisfiable core [2023-03-30 22:13:36,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:13:36,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:13:36,641 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-30 22:13:36,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:13:36,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-03-30 22:13:36,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-03-30 22:13:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-30 22:13:36,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913758956] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:13:36,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:13:36,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 14] total 31 [2023-03-30 22:13:36,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363035595] [2023-03-30 22:13:36,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:13:36,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-03-30 22:13:36,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:13:36,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-03-30 22:13:36,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2023-03-30 22:13:36,746 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 31 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-30 22:13:37,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:13:37,244 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2023-03-30 22:13:37,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-03-30 22:13:37,244 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 39 [2023-03-30 22:13:37,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:13:37,245 INFO L225 Difference]: With dead ends: 52 [2023-03-30 22:13:37,245 INFO L226 Difference]: Without dead ends: 50 [2023-03-30 22:13:37,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2023-03-30 22:13:37,246 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-30 22:13:37,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 135 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-30 22:13:37,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-03-30 22:13:37,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2023-03-30 22:13:37,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 22:13:37,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2023-03-30 22:13:37,256 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 39 [2023-03-30 22:13:37,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:13:37,256 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2023-03-30 22:13:37,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-30 22:13:37,257 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2023-03-30 22:13:37,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-03-30 22:13:37,257 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:37,257 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:37,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-03-30 22:13:37,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:37,463 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:37,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:37,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1695672143, now seen corresponding path program 7 times [2023-03-30 22:13:37,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:37,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892643883] [2023-03-30 22:13:37,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:37,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:37,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:37,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-03-30 22:13:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:37,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-03-30 22:13:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:37,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-03-30 22:13:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:37,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-03-30 22:13:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-30 22:13:37,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:37,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892643883] [2023-03-30 22:13:37,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892643883] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:13:37,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797658974] [2023-03-30 22:13:37,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-30 22:13:37,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:37,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:13:37,614 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) [2023-03-30 22:13:37,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-30 22:13:37,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:37,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-30 22:13:37,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:13:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-30 22:13:37,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:13:37,927 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-30 22:13:37,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797658974] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:13:37,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:13:37,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2023-03-30 22:13:37,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480157870] [2023-03-30 22:13:37,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:13:37,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-03-30 22:13:37,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:13:37,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-03-30 22:13:37,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2023-03-30 22:13:37,930 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-30 22:13:38,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:13:38,161 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2023-03-30 22:13:38,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-03-30 22:13:38,162 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 46 [2023-03-30 22:13:38,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:13:38,163 INFO L225 Difference]: With dead ends: 93 [2023-03-30 22:13:38,163 INFO L226 Difference]: Without dead ends: 54 [2023-03-30 22:13:38,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2023-03-30 22:13:38,164 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:13:38,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:13:38,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-03-30 22:13:38,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2023-03-30 22:13:38,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 22:13:38,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2023-03-30 22:13:38,172 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 46 [2023-03-30 22:13:38,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:13:38,173 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2023-03-30 22:13:38,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-30 22:13:38,173 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2023-03-30 22:13:38,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-30 22:13:38,174 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:38,174 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:38,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-30 22:13:38,383 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,SelfDestructingSolverStorable8 [2023-03-30 22:13:38,384 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:38,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:38,384 INFO L85 PathProgramCache]: Analyzing trace with hash -680103840, now seen corresponding path program 8 times [2023-03-30 22:13:38,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:38,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125481933] [2023-03-30 22:13:38,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:38,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:38,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:38,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:38,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-03-30 22:13:38,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:38,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-03-30 22:13:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:38,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-03-30 22:13:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:38,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-03-30 22:13:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-30 22:13:38,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:38,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125481933] [2023-03-30 22:13:38,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125481933] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:13:38,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744823570] [2023-03-30 22:13:38,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:13:38,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:38,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:13:38,877 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) [2023-03-30 22:13:38,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-30 22:13:38,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:13:38,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:13:38,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 52 conjunts are in the unsatisfiable core [2023-03-30 22:13:38,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:13:39,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:13:39,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-30 22:13:39,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:13:39,830 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-30 22:13:39,832 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-30 22:13:39,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 13 [2023-03-30 22:13:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-30 22:13:39,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:13:40,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744823570] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:13:40,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-30 22:13:40,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2023-03-30 22:13:40,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995034524] [2023-03-30 22:13:40,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-30 22:13:40,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-03-30 22:13:40,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:13:40,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-03-30 22:13:40,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1344, Unknown=0, NotChecked=0, Total=1482 [2023-03-30 22:13:40,087 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 36 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 11 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-03-30 22:13:40,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:13:40,941 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2023-03-30 22:13:40,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-03-30 22:13:40,941 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 11 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 47 [2023-03-30 22:13:40,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:13:40,942 INFO L225 Difference]: With dead ends: 98 [2023-03-30 22:13:40,942 INFO L226 Difference]: Without dead ends: 59 [2023-03-30 22:13:40,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=331, Invalid=3091, Unknown=0, NotChecked=0, Total=3422 [2023-03-30 22:13:40,945 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-30 22:13:40,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 113 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-30 22:13:40,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-03-30 22:13:40,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2023-03-30 22:13:40,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 43 states have internal predecessors, (44), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-30 22:13:40,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2023-03-30 22:13:40,954 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 47 [2023-03-30 22:13:40,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:13:40,954 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2023-03-30 22:13:40,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 11 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-03-30 22:13:40,954 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2023-03-30 22:13:40,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-03-30 22:13:40,955 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:40,955 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:40,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-30 22:13:41,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-30 22:13:41,161 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:41,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:41,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2041524099, now seen corresponding path program 9 times [2023-03-30 22:13:41,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:41,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364930629] [2023-03-30 22:13:41,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:41,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:41,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:41,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-03-30 22:13:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:41,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-03-30 22:13:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:41,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-03-30 22:13:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:41,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-03-30 22:13:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:41,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-03-30 22:13:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:41,575 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-30 22:13:41,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:41,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364930629] [2023-03-30 22:13:41,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364930629] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:13:41,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708425900] [2023-03-30 22:13:41,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:13:41,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:41,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:13:41,577 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:13:41,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-30 22:13:41,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-03-30 22:13:41,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:13:41,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjunts are in the unsatisfiable core [2023-03-30 22:13:41,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:13:41,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-03-30 22:13:42,449 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-03-30 22:13:42,449 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 21 treesize of output 10 [2023-03-30 22:13:42,523 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 35 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-30 22:13:42,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:13:42,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708425900] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:13:42,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-30 22:13:42,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2023-03-30 22:13:42,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038609686] [2023-03-30 22:13:42,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-30 22:13:42,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-03-30 22:13:42,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:13:42,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-03-30 22:13:42,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2023-03-30 22:13:42,676 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 37 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 states have internal predecessors, (55), 13 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-03-30 22:13:43,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:13:43,461 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2023-03-30 22:13:43,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-03-30 22:13:43,461 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 states have internal predecessors, (55), 13 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 55 [2023-03-30 22:13:43,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:13:43,462 INFO L225 Difference]: With dead ends: 113 [2023-03-30 22:13:43,462 INFO L226 Difference]: Without dead ends: 67 [2023-03-30 22:13:43,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 57 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=392, Invalid=3898, Unknown=0, NotChecked=0, Total=4290 [2023-03-30 22:13:43,464 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-30 22:13:43,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 112 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-30 22:13:43,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-03-30 22:13:43,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2023-03-30 22:13:43,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 49 states have internal predecessors, (50), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-30 22:13:43,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2023-03-30 22:13:43,476 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 55 [2023-03-30 22:13:43,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:13:43,476 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2023-03-30 22:13:43,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 states have internal predecessors, (55), 13 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-03-30 22:13:43,476 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2023-03-30 22:13:43,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-03-30 22:13:43,477 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:43,479 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:43,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-30 22:13:43,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-03-30 22:13:43,681 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:43,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:43,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1008856576, now seen corresponding path program 10 times [2023-03-30 22:13:43,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:43,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930003567] [2023-03-30 22:13:43,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:43,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:43,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:44,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:44,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-03-30 22:13:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:44,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-03-30 22:13:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:44,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-03-30 22:13:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:44,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-03-30 22:13:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:44,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-03-30 22:13:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:44,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-03-30 22:13:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:44,205 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-03-30 22:13:44,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:44,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930003567] [2023-03-30 22:13:44,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930003567] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:13:44,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263635801] [2023-03-30 22:13:44,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-30 22:13:44,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:44,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:13:44,209 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:13:44,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-30 22:13:44,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-30 22:13:44,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:13:44,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 45 conjunts are in the unsatisfiable core [2023-03-30 22:13:44,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:13:44,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-03-30 22:13:44,994 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-03-30 22:13:44,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:13:45,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-03-30 22:13:45,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-03-30 22:13:45,133 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-03-30 22:13:45,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263635801] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:13:45,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:13:45,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 20] total 34 [2023-03-30 22:13:45,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433740046] [2023-03-30 22:13:45,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:13:45,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-03-30 22:13:45,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:13:45,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-03-30 22:13:45,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1029, Unknown=0, NotChecked=0, Total=1122 [2023-03-30 22:13:45,136 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 34 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 15 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-03-30 22:13:45,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:13:45,831 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2023-03-30 22:13:45,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-03-30 22:13:45,831 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 15 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 63 [2023-03-30 22:13:45,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:13:45,832 INFO L225 Difference]: With dead ends: 76 [2023-03-30 22:13:45,832 INFO L226 Difference]: Without dead ends: 74 [2023-03-30 22:13:45,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 114 SyntacticMatches, 15 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2023-03-30 22:13:45,833 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-30 22:13:45,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 138 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-30 22:13:45,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-03-30 22:13:45,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2023-03-30 22:13:45,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-03-30 22:13:45,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2023-03-30 22:13:45,848 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 63 [2023-03-30 22:13:45,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:13:45,848 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2023-03-30 22:13:45,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 15 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-03-30 22:13:45,848 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2023-03-30 22:13:45,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-03-30 22:13:45,849 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:45,849 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:45,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-03-30 22:13:46,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-03-30 22:13:46,055 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:46,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:46,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1594200530, now seen corresponding path program 11 times [2023-03-30 22:13:46,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:46,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355765534] [2023-03-30 22:13:46,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:46,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:46,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:46,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-03-30 22:13:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:46,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-03-30 22:13:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:46,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-03-30 22:13:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:46,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-03-30 22:13:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:46,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-03-30 22:13:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:46,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-03-30 22:13:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:46,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-03-30 22:13:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 72 proven. 47 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-03-30 22:13:46,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:46,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355765534] [2023-03-30 22:13:46,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355765534] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:13:46,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943696177] [2023-03-30 22:13:46,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-30 22:13:46,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:46,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:13:46,329 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:13:46,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-03-30 22:13:46,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-03-30 22:13:46,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:13:46,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 18 conjunts are in the unsatisfiable core [2023-03-30 22:13:46,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:13:46,636 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-03-30 22:13:46,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:13:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-03-30 22:13:46,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943696177] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:13:46,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:13:46,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2023-03-30 22:13:46,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901814893] [2023-03-30 22:13:46,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:13:46,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-03-30 22:13:46,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:13:46,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-03-30 22:13:46,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2023-03-30 22:13:46,789 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-03-30 22:13:47,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:13:47,081 INFO L93 Difference]: Finished difference Result 138 states and 141 transitions. [2023-03-30 22:13:47,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-03-30 22:13:47,082 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 70 [2023-03-30 22:13:47,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:13:47,083 INFO L225 Difference]: With dead ends: 138 [2023-03-30 22:13:47,083 INFO L226 Difference]: Without dead ends: 78 [2023-03-30 22:13:47,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 131 SyntacticMatches, 15 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=341, Invalid=1141, Unknown=0, NotChecked=0, Total=1482 [2023-03-30 22:13:47,084 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 39 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:13:47,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 42 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:13:47,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-03-30 22:13:47,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2023-03-30 22:13:47,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.037037037037037) internal successors, (56), 55 states have internal predecessors, (56), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-03-30 22:13:47,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2023-03-30 22:13:47,096 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 70 [2023-03-30 22:13:47,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:13:47,096 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2023-03-30 22:13:47,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-03-30 22:13:47,096 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2023-03-30 22:13:47,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-03-30 22:13:47,097 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:47,097 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:47,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-03-30 22:13:47,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-03-30 22:13:47,303 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:47,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:47,303 INFO L85 PathProgramCache]: Analyzing trace with hash -2049689629, now seen corresponding path program 12 times [2023-03-30 22:13:47,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:47,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619405107] [2023-03-30 22:13:47,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:47,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:47,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:47,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-03-30 22:13:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:47,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-03-30 22:13:47,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:47,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-03-30 22:13:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:47,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-03-30 22:13:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:47,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-03-30 22:13:47,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:47,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-03-30 22:13:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:47,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-03-30 22:13:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 113 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-03-30 22:13:47,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:47,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619405107] [2023-03-30 22:13:47,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619405107] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:13:47,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033626335] [2023-03-30 22:13:47,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-03-30 22:13:47,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:47,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:13:47,854 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:13:47,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-03-30 22:13:47,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-03-30 22:13:47,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:13:47,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 68 conjunts are in the unsatisfiable core [2023-03-30 22:13:48,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:13:48,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-03-30 22:13:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 9 proven. 136 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-03-30 22:13:49,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:13:49,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-03-30 22:13:49,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-03-30 22:13:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 113 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-03-30 22:13:50,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033626335] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:13:50,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:13:50,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26, 23] total 65 [2023-03-30 22:13:50,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581191947] [2023-03-30 22:13:50,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:13:50,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-03-30 22:13:50,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:13:50,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-03-30 22:13:50,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=3818, Unknown=0, NotChecked=0, Total=4160 [2023-03-30 22:13:50,042 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 65 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 62 states have internal predecessors, (96), 24 states have call successors, (26), 5 states have call predecessors, (26), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-03-30 22:13:52,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:13:52,696 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2023-03-30 22:13:52,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-03-30 22:13:52,696 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 62 states have internal predecessors, (96), 24 states have call successors, (26), 5 states have call predecessors, (26), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 71 [2023-03-30 22:13:52,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:13:52,697 INFO L225 Difference]: With dead ends: 175 [2023-03-30 22:13:52,698 INFO L226 Difference]: Without dead ends: 173 [2023-03-30 22:13:52,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 106 SyntacticMatches, 13 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2947 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1066, Invalid=10490, Unknown=0, NotChecked=0, Total=11556 [2023-03-30 22:13:52,701 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 97 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 2237 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 2380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:13:52,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 196 Invalid, 2380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2237 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-03-30 22:13:52,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-03-30 22:13:52,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 162. [2023-03-30 22:13:52,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 118 states have internal predecessors, (119), 27 states have call successors, (27), 19 states have call predecessors, (27), 18 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2023-03-30 22:13:52,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 172 transitions. [2023-03-30 22:13:52,747 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 172 transitions. Word has length 71 [2023-03-30 22:13:52,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:13:52,748 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 172 transitions. [2023-03-30 22:13:52,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 62 states have internal predecessors, (96), 24 states have call successors, (26), 5 states have call predecessors, (26), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-03-30 22:13:52,748 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 172 transitions. [2023-03-30 22:13:52,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-03-30 22:13:52,750 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:52,750 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:52,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-03-30 22:13:52,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-03-30 22:13:52,956 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:52,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:52,956 INFO L85 PathProgramCache]: Analyzing trace with hash -171271264, now seen corresponding path program 13 times [2023-03-30 22:13:52,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:52,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428577791] [2023-03-30 22:13:52,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:52,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:53,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:53,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:53,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-03-30 22:13:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:53,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-03-30 22:13:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:53,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-03-30 22:13:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:53,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-03-30 22:13:53,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:53,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-03-30 22:13:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:53,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-03-30 22:13:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:53,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-03-30 22:13:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:53,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-03-30 22:13:53,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:53,742 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 16 proven. 145 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-03-30 22:13:53,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:53,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428577791] [2023-03-30 22:13:53,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428577791] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:13:53,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240891133] [2023-03-30 22:13:53,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-30 22:13:53,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:53,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:13:53,745 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:13:53,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-03-30 22:13:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:53,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 50 conjunts are in the unsatisfiable core [2023-03-30 22:13:53,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:13:53,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:13:54,744 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-03-30 22:13:54,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:13:55,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-03-30 22:13:55,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-03-30 22:13:55,372 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 16 proven. 145 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-03-30 22:13:55,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240891133] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:13:55,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:13:55,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 24] total 56 [2023-03-30 22:13:55,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911854468] [2023-03-30 22:13:55,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:13:55,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-03-30 22:13:55,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:13:55,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-03-30 22:13:55,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2905, Unknown=0, NotChecked=0, Total=3080 [2023-03-30 22:13:55,375 INFO L87 Difference]: Start difference. First operand 162 states and 172 transitions. Second operand has 56 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 53 states have internal predecessors, (89), 26 states have call successors, (29), 5 states have call predecessors, (29), 2 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2023-03-30 22:13:56,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:13:56,332 INFO L93 Difference]: Finished difference Result 181 states and 191 transitions. [2023-03-30 22:13:56,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-03-30 22:13:56,332 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 53 states have internal predecessors, (89), 26 states have call successors, (29), 5 states have call predecessors, (29), 2 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) Word has length 79 [2023-03-30 22:13:56,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:13:56,334 INFO L225 Difference]: With dead ends: 181 [2023-03-30 22:13:56,334 INFO L226 Difference]: Without dead ends: 179 [2023-03-30 22:13:56,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 129 SyntacticMatches, 17 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=219, Invalid=3563, Unknown=0, NotChecked=0, Total=3782 [2023-03-30 22:13:56,336 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 1990 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 2012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-30 22:13:56,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 255 Invalid, 2012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1990 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-30 22:13:56,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-03-30 22:13:56,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 169. [2023-03-30 22:13:56,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 121 states have (on average 1.024793388429752) internal successors, (124), 123 states have internal predecessors, (124), 28 states have call successors, (28), 20 states have call predecessors, (28), 19 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2023-03-30 22:13:56,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 179 transitions. [2023-03-30 22:13:56,385 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 179 transitions. Word has length 79 [2023-03-30 22:13:56,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:13:56,385 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 179 transitions. [2023-03-30 22:13:56,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 53 states have internal predecessors, (89), 26 states have call successors, (29), 5 states have call predecessors, (29), 2 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2023-03-30 22:13:56,385 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 179 transitions. [2023-03-30 22:13:56,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-03-30 22:13:56,386 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:56,386 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:56,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-03-30 22:13:56,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:56,592 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:56,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:56,592 INFO L85 PathProgramCache]: Analyzing trace with hash -648481742, now seen corresponding path program 14 times [2023-03-30 22:13:56,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:56,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404725168] [2023-03-30 22:13:56,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:56,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:56,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:56,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-03-30 22:13:56,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:56,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-03-30 22:13:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:56,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-03-30 22:13:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:56,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-03-30 22:13:56,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:56,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-03-30 22:13:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:56,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-03-30 22:13:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:56,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-03-30 22:13:56,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:56,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-03-30 22:13:56,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:56,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-03-30 22:13:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:56,940 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 119 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-03-30 22:13:56,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:56,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404725168] [2023-03-30 22:13:56,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404725168] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:13:56,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684044900] [2023-03-30 22:13:56,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:13:56,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:56,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:13:56,942 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:13:56,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-03-30 22:13:57,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:13:57,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:13:57,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 22 conjunts are in the unsatisfiable core [2023-03-30 22:13:57,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:13:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-03-30 22:13:57,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:13:57,543 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-03-30 22:13:57,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684044900] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:13:57,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:13:57,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 36 [2023-03-30 22:13:57,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449180395] [2023-03-30 22:13:57,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:13:57,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-03-30 22:13:57,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:13:57,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-03-30 22:13:57,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=967, Unknown=0, NotChecked=0, Total=1260 [2023-03-30 22:13:57,546 INFO L87 Difference]: Start difference. First operand 169 states and 179 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 21 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-03-30 22:13:58,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:13:58,075 INFO L93 Difference]: Finished difference Result 252 states and 263 transitions. [2023-03-30 22:13:58,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-03-30 22:13:58,076 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 21 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 86 [2023-03-30 22:13:58,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:13:58,077 INFO L225 Difference]: With dead ends: 252 [2023-03-30 22:13:58,077 INFO L226 Difference]: Without dead ends: 94 [2023-03-30 22:13:58,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 161 SyntacticMatches, 19 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=700, Invalid=2492, Unknown=0, NotChecked=0, Total=3192 [2023-03-30 22:13:58,079 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-30 22:13:58,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 42 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-30 22:13:58,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-03-30 22:13:58,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2023-03-30 22:13:58,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 67 states have internal predecessors, (68), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-03-30 22:13:58,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2023-03-30 22:13:58,092 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 86 [2023-03-30 22:13:58,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:13:58,093 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2023-03-30 22:13:58,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 21 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-03-30 22:13:58,093 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2023-03-30 22:13:58,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-03-30 22:13:58,094 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:58,094 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:58,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-03-30 22:13:58,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-03-30 22:13:58,295 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:58,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:58,295 INFO L85 PathProgramCache]: Analyzing trace with hash 627267651, now seen corresponding path program 15 times [2023-03-30 22:13:58,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:58,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623979011] [2023-03-30 22:13:58,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:58,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:58,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:58,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-03-30 22:13:58,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:58,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-03-30 22:13:58,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:58,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-03-30 22:13:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:58,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-03-30 22:13:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:58,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-03-30 22:13:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:58,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-03-30 22:13:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:58,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-03-30 22:13:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:58,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-03-30 22:13:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:58,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-03-30 22:13:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 18 proven. 181 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-03-30 22:13:58,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:58,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623979011] [2023-03-30 22:13:58,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623979011] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:13:58,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125091458] [2023-03-30 22:13:58,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:13:58,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:58,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:13:58,989 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:13:59,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-03-30 22:13:59,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-03-30 22:13:59,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:13:59,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 77 conjunts are in the unsatisfiable core [2023-03-30 22:13:59,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:13:59,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-03-30 22:14:00,645 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 6 proven. 217 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-03-30 22:14:00,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:14:00,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-03-30 22:14:00,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-03-30 22:14:00,797 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 18 proven. 181 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-03-30 22:14:00,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125091458] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:14:00,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:14:00,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29, 26] total 52 [2023-03-30 22:14:00,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253691424] [2023-03-30 22:14:00,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:14:00,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-03-30 22:14:00,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:14:00,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-03-30 22:14:00,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2505, Unknown=0, NotChecked=0, Total=2652 [2023-03-30 22:14:00,800 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 52 states, 50 states have (on average 1.62) internal successors, (81), 49 states have internal predecessors, (81), 21 states have call successors, (24), 5 states have call predecessors, (24), 3 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2023-03-30 22:14:01,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:14:01,856 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2023-03-30 22:14:01,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-03-30 22:14:01,856 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 1.62) internal successors, (81), 49 states have internal predecessors, (81), 21 states have call successors, (24), 5 states have call predecessors, (24), 3 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 87 [2023-03-30 22:14:01,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:14:01,857 INFO L225 Difference]: With dead ends: 100 [2023-03-30 22:14:01,857 INFO L226 Difference]: Without dead ends: 98 [2023-03-30 22:14:01,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 150 SyntacticMatches, 21 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=275, Invalid=4281, Unknown=0, NotChecked=0, Total=4556 [2023-03-30 22:14:01,859 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 29 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 2069 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 2104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-30 22:14:01,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 199 Invalid, 2104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2069 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-30 22:14:01,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-03-30 22:14:01,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2023-03-30 22:14:01,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.028169014084507) internal successors, (73), 72 states have internal predecessors, (73), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-03-30 22:14:01,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2023-03-30 22:14:01,875 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 87 [2023-03-30 22:14:01,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:14:01,875 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2023-03-30 22:14:01,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 1.62) internal successors, (81), 49 states have internal predecessors, (81), 21 states have call successors, (24), 5 states have call predecessors, (24), 3 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2023-03-30 22:14:01,876 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2023-03-30 22:14:01,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-03-30 22:14:01,876 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:14:01,876 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:14:01,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-03-30 22:14:02,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-03-30 22:14:02,084 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:14:02,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:14:02,084 INFO L85 PathProgramCache]: Analyzing trace with hash -267105745, now seen corresponding path program 16 times [2023-03-30 22:14:02,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:14:02,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475882809] [2023-03-30 22:14:02,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:14:02,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:14:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:02,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:14:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:02,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-03-30 22:14:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:02,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-03-30 22:14:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:02,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-03-30 22:14:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:02,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-03-30 22:14:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:02,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-03-30 22:14:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:02,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-03-30 22:14:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:02,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-03-30 22:14:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:02,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-03-30 22:14:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:02,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-03-30 22:14:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:02,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-03-30 22:14:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:02,474 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 147 proven. 83 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-03-30 22:14:02,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:14:02,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475882809] [2023-03-30 22:14:02,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475882809] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:14:02,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82220703] [2023-03-30 22:14:02,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-30 22:14:02,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:14:02,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:14:02,476 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:14:02,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-03-30 22:14:02,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-30 22:14:02,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:14:02,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 24 conjunts are in the unsatisfiable core [2023-03-30 22:14:02,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:14:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 175 proven. 55 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-03-30 22:14:02,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:14:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 175 proven. 55 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-03-30 22:14:03,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82220703] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:14:03,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:14:03,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 39 [2023-03-30 22:14:03,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322150180] [2023-03-30 22:14:03,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:14:03,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-03-30 22:14:03,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:14:03,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-03-30 22:14:03,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=1139, Unknown=0, NotChecked=0, Total=1482 [2023-03-30 22:14:03,205 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 23 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-03-30 22:14:03,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:14:03,558 INFO L93 Difference]: Finished difference Result 183 states and 186 transitions. [2023-03-30 22:14:03,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-03-30 22:14:03,558 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 23 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 94 [2023-03-30 22:14:03,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:14:03,559 INFO L225 Difference]: With dead ends: 183 [2023-03-30 22:14:03,559 INFO L226 Difference]: Without dead ends: 102 [2023-03-30 22:14:03,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 176 SyntacticMatches, 21 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=578, Invalid=1972, Unknown=0, NotChecked=0, Total=2550 [2023-03-30 22:14:03,561 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:14:03,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 33 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:14:03,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-03-30 22:14:03,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2023-03-30 22:14:03,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 73 states have internal predecessors, (74), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-03-30 22:14:03,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2023-03-30 22:14:03,573 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 94 [2023-03-30 22:14:03,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:14:03,574 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2023-03-30 22:14:03,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 23 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-03-30 22:14:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2023-03-30 22:14:03,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-03-30 22:14:03,575 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:14:03,575 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:14:03,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-03-30 22:14:03,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-03-30 22:14:03,781 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:14:03,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:14:03,782 INFO L85 PathProgramCache]: Analyzing trace with hash 637930816, now seen corresponding path program 17 times [2023-03-30 22:14:03,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:14:03,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424169696] [2023-03-30 22:14:03,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:14:03,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:14:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:04,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:14:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:04,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-03-30 22:14:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:04,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-03-30 22:14:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:04,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-03-30 22:14:04,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:04,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-03-30 22:14:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:04,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-03-30 22:14:04,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:04,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-03-30 22:14:04,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:04,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-03-30 22:14:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:04,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-03-30 22:14:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:04,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-03-30 22:14:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:04,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-03-30 22:14:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 20 proven. 221 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-03-30 22:14:04,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:14:04,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424169696] [2023-03-30 22:14:04,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424169696] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:14:04,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157612468] [2023-03-30 22:14:04,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-30 22:14:04,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:14:04,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:14:04,521 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:14:04,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-03-30 22:14:04,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-03-30 22:14:04,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:14:04,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 63 conjunts are in the unsatisfiable core [2023-03-30 22:14:04,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:14:05,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:14:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 18 proven. 250 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-03-30 22:14:06,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:14:06,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-03-30 22:14:06,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-03-30 22:14:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 20 proven. 221 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-03-30 22:14:06,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157612468] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:14:06,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:14:06,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31, 28] total 59 [2023-03-30 22:14:06,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743435922] [2023-03-30 22:14:06,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:14:06,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-03-30 22:14:06,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:14:06,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-03-30 22:14:06,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=3241, Unknown=0, NotChecked=0, Total=3422 [2023-03-30 22:14:06,618 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 59 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 56 states have internal predecessors, (91), 24 states have call successors, (26), 5 states have call predecessors, (26), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-03-30 22:14:07,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:14:07,847 INFO L93 Difference]: Finished difference Result 108 states and 109 transitions. [2023-03-30 22:14:07,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-03-30 22:14:07,848 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 56 states have internal predecessors, (91), 24 states have call successors, (26), 5 states have call predecessors, (26), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 95 [2023-03-30 22:14:07,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:14:07,848 INFO L225 Difference]: With dead ends: 108 [2023-03-30 22:14:07,848 INFO L226 Difference]: Without dead ends: 106 [2023-03-30 22:14:07,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 163 SyntacticMatches, 21 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=330, Invalid=5370, Unknown=0, NotChecked=0, Total=5700 [2023-03-30 22:14:07,850 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 2594 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 2630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-30 22:14:07,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 232 Invalid, 2630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2594 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-30 22:14:07,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-03-30 22:14:07,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2023-03-30 22:14:07,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 77 states have (on average 1.025974025974026) internal successors, (79), 78 states have internal predecessors, (79), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-03-30 22:14:07,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2023-03-30 22:14:07,866 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 95 [2023-03-30 22:14:07,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:14:07,866 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2023-03-30 22:14:07,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 56 states have internal predecessors, (91), 24 states have call successors, (26), 5 states have call predecessors, (26), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-03-30 22:14:07,866 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2023-03-30 22:14:07,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-03-30 22:14:07,867 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:14:07,867 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:14:07,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-03-30 22:14:08,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:14:08,068 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:14:08,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:14:08,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1380478610, now seen corresponding path program 18 times [2023-03-30 22:14:08,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:14:08,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996344634] [2023-03-30 22:14:08,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:14:08,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:14:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:08,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:14:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:08,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-03-30 22:14:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:08,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-03-30 22:14:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:08,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-03-30 22:14:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:08,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-03-30 22:14:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:08,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-03-30 22:14:08,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:08,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-03-30 22:14:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:08,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-03-30 22:14:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:08,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-03-30 22:14:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:08,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-03-30 22:14:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:08,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-03-30 22:14:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:08,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-03-30 22:14:08,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 178 proven. 97 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-03-30 22:14:08,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:14:08,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996344634] [2023-03-30 22:14:08,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996344634] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:14:08,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036580027] [2023-03-30 22:14:08,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-03-30 22:14:08,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:14:08,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:14:08,505 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:14:08,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-03-30 22:14:08,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-03-30 22:14:08,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:14:08,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 26 conjunts are in the unsatisfiable core [2023-03-30 22:14:08,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:14:09,098 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-03-30 22:14:09,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:14:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-03-30 22:14:09,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036580027] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:14:09,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:14:09,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 42 [2023-03-30 22:14:09,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29715575] [2023-03-30 22:14:09,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:14:09,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-03-30 22:14:09,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:14:09,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-03-30 22:14:09,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1325, Unknown=0, NotChecked=0, Total=1722 [2023-03-30 22:14:09,368 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 42 states, 42 states have (on average 1.880952380952381) internal successors, (79), 41 states have internal predecessors, (79), 25 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-03-30 22:14:09,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:14:09,732 INFO L93 Difference]: Finished difference Result 198 states and 201 transitions. [2023-03-30 22:14:09,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-03-30 22:14:09,732 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.880952380952381) internal successors, (79), 41 states have internal predecessors, (79), 25 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 102 [2023-03-30 22:14:09,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:14:09,733 INFO L225 Difference]: With dead ends: 198 [2023-03-30 22:14:09,733 INFO L226 Difference]: Without dead ends: 110 [2023-03-30 22:14:09,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 191 SyntacticMatches, 23 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=671, Invalid=2299, Unknown=0, NotChecked=0, Total=2970 [2023-03-30 22:14:09,734 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 73 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:14:09,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 39 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:14:09,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-03-30 22:14:09,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2023-03-30 22:14:09,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 79 states have internal predecessors, (80), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-03-30 22:14:09,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2023-03-30 22:14:09,752 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 102 [2023-03-30 22:14:09,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:14:09,752 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2023-03-30 22:14:09,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.880952380952381) internal successors, (79), 41 states have internal predecessors, (79), 25 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-03-30 22:14:09,752 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2023-03-30 22:14:09,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-03-30 22:14:09,753 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:14:09,753 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:14:09,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-03-30 22:14:09,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:14:09,959 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:14:09,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:14:09,959 INFO L85 PathProgramCache]: Analyzing trace with hash 5410979, now seen corresponding path program 19 times [2023-03-30 22:14:09,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:14:09,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116770873] [2023-03-30 22:14:09,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:14:09,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:14:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:10,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:14:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:10,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-03-30 22:14:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:10,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-03-30 22:14:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:10,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-03-30 22:14:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:10,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-03-30 22:14:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:10,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-03-30 22:14:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:10,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-03-30 22:14:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:10,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-03-30 22:14:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:10,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-03-30 22:14:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:10,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-03-30 22:14:10,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:10,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-03-30 22:14:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:10,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-03-30 22:14:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:10,707 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 22 proven. 265 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-03-30 22:14:10,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:14:10,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116770873] [2023-03-30 22:14:10,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116770873] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:14:10,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265669296] [2023-03-30 22:14:10,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-30 22:14:10,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:14:10,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:14:10,709 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:14:10,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-03-30 22:14:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:10,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 62 conjunts are in the unsatisfiable core [2023-03-30 22:14:10,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:14:11,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:14:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-03-30 22:14:12,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:14:12,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-03-30 22:14:12,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-03-30 22:14:12,859 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 22 proven. 265 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-03-30 22:14:12,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265669296] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:14:12,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:14:12,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 30] total 61 [2023-03-30 22:14:12,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727230781] [2023-03-30 22:14:12,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:14:12,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-03-30 22:14:12,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:14:12,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-03-30 22:14:12,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=3473, Unknown=0, NotChecked=0, Total=3660 [2023-03-30 22:14:12,861 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 61 states, 59 states have (on average 1.5932203389830508) internal successors, (94), 58 states have internal predecessors, (94), 26 states have call successors, (28), 5 states have call predecessors, (28), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-03-30 22:14:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:14:13,987 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2023-03-30 22:14:13,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-03-30 22:14:13,988 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 59 states have (on average 1.5932203389830508) internal successors, (94), 58 states have internal predecessors, (94), 26 states have call successors, (28), 5 states have call predecessors, (28), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 103 [2023-03-30 22:14:13,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:14:13,988 INFO L225 Difference]: With dead ends: 116 [2023-03-30 22:14:13,988 INFO L226 Difference]: Without dead ends: 114 [2023-03-30 22:14:13,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 178 SyntacticMatches, 23 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=224, Invalid=4066, Unknown=0, NotChecked=0, Total=4290 [2023-03-30 22:14:13,990 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 3079 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 3106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 3079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:14:13,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 261 Invalid, 3106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 3079 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-03-30 22:14:13,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-03-30 22:14:14,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2023-03-30 22:14:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 84 states have internal predecessors, (85), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-03-30 22:14:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2023-03-30 22:14:14,006 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 103 [2023-03-30 22:14:14,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:14:14,006 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2023-03-30 22:14:14,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 59 states have (on average 1.5932203389830508) internal successors, (94), 58 states have internal predecessors, (94), 26 states have call successors, (28), 5 states have call predecessors, (28), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-03-30 22:14:14,006 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2023-03-30 22:14:14,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-03-30 22:14:14,007 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:14:14,007 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:14:14,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-03-30 22:14:14,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-03-30 22:14:14,212 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:14:14,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:14:14,213 INFO L85 PathProgramCache]: Analyzing trace with hash -259594801, now seen corresponding path program 20 times [2023-03-30 22:14:14,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:14:14,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497251786] [2023-03-30 22:14:14,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:14:14,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:14:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:14,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:14:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:14,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-03-30 22:14:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:14,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-03-30 22:14:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:14,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-03-30 22:14:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:14,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-03-30 22:14:14,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:14,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-03-30 22:14:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:14,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-03-30 22:14:14,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:14,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-03-30 22:14:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:14,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-03-30 22:14:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:14,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-03-30 22:14:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:14,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-03-30 22:14:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:14,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-03-30 22:14:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:14,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-03-30 22:14:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 212 proven. 112 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-03-30 22:14:14,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:14:14,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497251786] [2023-03-30 22:14:14,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497251786] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:14:14,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960188341] [2023-03-30 22:14:14,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:14:14,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:14:14,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:14:14,689 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:14:14,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-03-30 22:14:14,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:14:14,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:14:14,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 28 conjunts are in the unsatisfiable core [2023-03-30 22:14:14,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:14:15,213 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-03-30 22:14:15,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:14:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-03-30 22:14:15,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960188341] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:14:15,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:14:15,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 45 [2023-03-30 22:14:15,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427770269] [2023-03-30 22:14:15,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:14:15,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-03-30 22:14:15,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:14:15,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-03-30 22:14:15,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=1525, Unknown=0, NotChecked=0, Total=1980 [2023-03-30 22:14:15,512 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 45 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 44 states have internal predecessors, (84), 27 states have call successors, (29), 4 states have call predecessors, (29), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-03-30 22:14:15,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:14:15,906 INFO L93 Difference]: Finished difference Result 213 states and 216 transitions. [2023-03-30 22:14:15,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-03-30 22:14:15,908 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 44 states have internal predecessors, (84), 27 states have call successors, (29), 4 states have call predecessors, (29), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 110 [2023-03-30 22:14:15,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:14:15,909 INFO L225 Difference]: With dead ends: 213 [2023-03-30 22:14:15,909 INFO L226 Difference]: Without dead ends: 118 [2023-03-30 22:14:15,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 206 SyntacticMatches, 25 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=771, Invalid=2651, Unknown=0, NotChecked=0, Total=3422 [2023-03-30 22:14:15,911 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 67 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:14:15,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 43 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:14:15,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-03-30 22:14:15,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2023-03-30 22:14:15,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 85 states have internal predecessors, (86), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-03-30 22:14:15,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2023-03-30 22:14:15,932 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 110 [2023-03-30 22:14:15,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:14:15,932 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2023-03-30 22:14:15,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 44 states have internal predecessors, (84), 27 states have call successors, (29), 4 states have call predecessors, (29), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-03-30 22:14:15,932 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2023-03-30 22:14:15,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-03-30 22:14:15,933 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:14:15,933 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:14:15,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-03-30 22:14:16,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-03-30 22:14:16,137 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:14:16,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:14:16,137 INFO L85 PathProgramCache]: Analyzing trace with hash -472226080, now seen corresponding path program 21 times [2023-03-30 22:14:16,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:14:16,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420024932] [2023-03-30 22:14:16,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:14:16,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:14:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:17,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:14:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:17,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-03-30 22:14:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:17,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-03-30 22:14:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:17,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-03-30 22:14:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:17,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-03-30 22:14:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:17,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-03-30 22:14:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:17,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-03-30 22:14:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:17,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-03-30 22:14:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:17,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-03-30 22:14:17,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:17,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-03-30 22:14:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:17,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2023-03-30 22:14:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:17,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-03-30 22:14:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:17,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2023-03-30 22:14:17,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:14:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 24 proven. 313 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-03-30 22:14:17,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:14:17,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420024932] [2023-03-30 22:14:17,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420024932] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:14:17,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36672882] [2023-03-30 22:14:17,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:14:17,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:14:17,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:14:17,299 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:14:17,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-03-30 22:14:17,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-03-30 22:14:17,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:14:17,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 71 conjunts are in the unsatisfiable core [2023-03-30 22:14:17,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:14:18,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-30 22:14:19,018 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-30 22:14:19,019 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-30 22:14:19,019 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 17 treesize of output 10 [2023-03-30 22:14:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 24 proven. 346 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-03-30 22:14:19,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:14:19,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-03-30 22:14:19,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-03-30 22:14:19,937 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 24 proven. 313 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-03-30 22:14:19,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36672882] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:14:19,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:14:19,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 35, 32] total 66 [2023-03-30 22:14:19,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643180005] [2023-03-30 22:14:19,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:14:19,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-03-30 22:14:19,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:14:19,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-03-30 22:14:19,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=4088, Unknown=0, NotChecked=0, Total=4290 [2023-03-30 22:14:19,940 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 66 states, 64 states have (on average 1.578125) internal successors, (101), 63 states have internal predecessors, (101), 27 states have call successors, (41), 5 states have call predecessors, (41), 3 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) [2023-03-30 22:14:21,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:14:21,769 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2023-03-30 22:14:21,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-03-30 22:14:21,769 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 64 states have (on average 1.578125) internal successors, (101), 63 states have internal predecessors, (101), 27 states have call successors, (41), 5 states have call predecessors, (41), 3 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) Word has length 111 [2023-03-30 22:14:21,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:14:21,770 INFO L225 Difference]: With dead ends: 124 [2023-03-30 22:14:21,770 INFO L226 Difference]: Without dead ends: 122 [2023-03-30 22:14:21,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 186 SyntacticMatches, 31 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=368, Invalid=6772, Unknown=0, NotChecked=0, Total=7140 [2023-03-30 22:14:21,772 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 24 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 3578 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 3615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:14:21,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 280 Invalid, 3615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 3578 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-30 22:14:21,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-03-30 22:14:21,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2023-03-30 22:14:21,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 90 states have internal predecessors, (91), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-03-30 22:14:21,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2023-03-30 22:14:21,792 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 111 [2023-03-30 22:14:21,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:14:21,793 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2023-03-30 22:14:21,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 64 states have (on average 1.578125) internal successors, (101), 63 states have internal predecessors, (101), 27 states have call successors, (41), 5 states have call predecessors, (41), 3 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) [2023-03-30 22:14:21,793 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2023-03-30 22:14:21,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-03-30 22:14:21,794 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:14:21,794 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:14:21,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-03-30 22:14:22,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:14:22,001 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:14:22,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:14:22,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1397358834, now seen corresponding path program 22 times [2023-03-30 22:14:22,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:14:22,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041413459] [2023-03-30 22:14:22,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:14:22,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:14:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat