/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_single_elem_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:13:31,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:13:31,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:13:31,612 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 22:13:31,661 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 22:13:31,687 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:13:31,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:13:31,687 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:13:31,688 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:13:31,689 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:13:31,689 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:13:31,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:13:31,690 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:13:31,690 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:13:31,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:13:31,691 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:13:31,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:13:31,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:13:31,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:13:31,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:13:31,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:13:31,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:13:31,692 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:13:31,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:13:31,692 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:13:31,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:13:31,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:13:31,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:13:31,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:13:31,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:13:31,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:13:31,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:13:31,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:13:31,693 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:13:31,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:13:31,694 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:13:31,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:13:31,694 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:13:31,694 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:13:31,694 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:13:31,695 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:13:31,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:13:31,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:13:31,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:13:31,937 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:13:31,937 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:13:31,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i [2023-03-30 22:13:33,019 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:13:33,175 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:13:33,175 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i [2023-03-30 22:13:33,179 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9805b6476/190b629751ea41c7955f14d16536684b/FLAG15c2fcf09 [2023-03-30 22:13:33,188 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9805b6476/190b629751ea41c7955f14d16536684b [2023-03-30 22:13:33,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:13:33,191 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:13:33,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:13:33,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:13:33,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:13:33,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:13:33" (1/1) ... [2023-03-30 22:13:33,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1892f00a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:13:33, skipping insertion in model container [2023-03-30 22:13:33,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:13:33" (1/1) ... [2023-03-30 22:13:33,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:13:33,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:13:33,318 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_single_elem_init.i[815,828] [2023-03-30 22:13:33,336 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:13:33,345 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:13:33,357 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_single_elem_init.i[815,828] [2023-03-30 22:13:33,364 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:13:33,375 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:13:33,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:13:33 WrapperNode [2023-03-30 22:13:33,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:13:33,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:13:33,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:13:33,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:13:33,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:13:33" (1/1) ... [2023-03-30 22:13:33,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:13:33" (1/1) ... [2023-03-30 22:13:33,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:13:33" (1/1) ... [2023-03-30 22:13:33,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:13:33" (1/1) ... [2023-03-30 22:13:33,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:13:33" (1/1) ... [2023-03-30 22:13:33,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:13:33" (1/1) ... [2023-03-30 22:13:33,399 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:13:33" (1/1) ... [2023-03-30 22:13:33,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:13:33" (1/1) ... [2023-03-30 22:13:33,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:13:33,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:13:33,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:13:33,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:13:33,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:13:33" (1/1) ... [2023-03-30 22:13:33,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:13:33,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:13:33,426 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 22:13:33,427 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 22:13:33,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:13:33,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:13:33,457 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:13:33,457 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-30 22:13:33,457 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:13:33,457 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:13:33,457 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:13:33,457 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-30 22:13:33,458 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-30 22:13:33,458 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:13:33,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:13:33,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-30 22:13:33,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:13:33,458 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:13:33,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-30 22:13:33,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:13:33,459 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:13:33,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:13:33,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:13:33,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:13:33,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:13:33,551 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:13:33,553 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:13:33,701 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:13:33,706 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:13:33,706 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-30 22:13:33,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:13:33 BoogieIcfgContainer [2023-03-30 22:13:33,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:13:33,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:13:33,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:13:33,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:13:33,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:13:33" (1/3) ... [2023-03-30 22:13:33,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25b26e32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:13:33, skipping insertion in model container [2023-03-30 22:13:33,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:13:33" (2/3) ... [2023-03-30 22:13:33,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25b26e32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:13:33, skipping insertion in model container [2023-03-30 22:13:33,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:13:33" (3/3) ... [2023-03-30 22:13:33,715 INFO L112 eAbstractionObserver]: Analyzing ICFG array_single_elem_init.i [2023-03-30 22:13:33,736 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:13:33,736 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:13:33,822 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:13:33,829 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;@3d41f21c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:13:33,830 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:13:33,838 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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 22:13:33,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-30 22:13:33,846 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:33,846 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:33,847 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:33,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:33,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1729551954, now seen corresponding path program 1 times [2023-03-30 22:13:33,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:33,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146354575] [2023-03-30 22:13:33,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:33,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:33,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:34,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:34,053 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 22:13:34,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:34,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146354575] [2023-03-30 22:13:34,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146354575] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:13:34,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:13:34,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:13:34,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457739433] [2023-03-30 22:13:34,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:13:34,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:13:34,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:13:34,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:13:34,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:13:34,080 INFO L87 Difference]: Start difference. First operand has 29 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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 22:13:34,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:13:34,151 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2023-03-30 22:13:34,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:13:34,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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 22:13:34,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:13:34,158 INFO L225 Difference]: With dead ends: 46 [2023-03-30 22:13:34,158 INFO L226 Difference]: Without dead ends: 24 [2023-03-30 22:13:34,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:13:34,163 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:13:34,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 10 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:13:34,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-03-30 22:13:34,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-03-30 22:13:34,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 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 22:13:34,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-03-30 22:13:34,192 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 14 [2023-03-30 22:13:34,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:13:34,192 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-03-30 22:13:34,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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 22:13:34,192 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-03-30 22:13:34,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-30 22:13:34,193 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:34,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:34,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:13:34,194 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:34,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:34,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1443190422, now seen corresponding path program 1 times [2023-03-30 22:13:34,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:34,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662701655] [2023-03-30 22:13:34,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:34,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:34,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:34,289 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 22:13:34,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:34,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662701655] [2023-03-30 22:13:34,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662701655] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:13:34,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:13:34,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 22:13:34,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056029100] [2023-03-30 22:13:34,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:13:34,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:13:34,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:13:34,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:13:34,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:13:34,293 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. 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 22:13:34,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:13:34,366 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2023-03-30 22:13:34,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 22:13:34,366 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 22:13:34,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:13:34,367 INFO L225 Difference]: With dead ends: 45 [2023-03-30 22:13:34,367 INFO L226 Difference]: Without dead ends: 33 [2023-03-30 22:13:34,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 22:13:34,369 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 45 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:13:34,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 12 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:13:34,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-03-30 22:13:34,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2023-03-30 22:13:34,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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 22:13:34,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-03-30 22:13:34,377 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 14 [2023-03-30 22:13:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:13:34,377 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-03-30 22:13:34,377 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 22:13:34,377 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-03-30 22:13:34,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-30 22:13:34,378 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:34,378 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:34,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:13:34,378 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:34,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:34,379 INFO L85 PathProgramCache]: Analyzing trace with hash 749519378, now seen corresponding path program 1 times [2023-03-30 22:13:34,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:34,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052165870] [2023-03-30 22:13:34,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:34,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:34,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-30 22:13:34,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:34,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052165870] [2023-03-30 22:13:34,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052165870] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:13:34,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941393614] [2023-03-30 22:13:34,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:34,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:34,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:13:34,524 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 22:13:34,537 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 22:13:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:34,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-30 22:13:34,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:13:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-30 22:13:34,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:13:34,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-30 22:13:34,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941393614] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:13:34,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:13:34,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-03-30 22:13:34,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213236880] [2023-03-30 22:13:34,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:13:34,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 22:13:34,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:13:34,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 22:13:34,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:13:34,730 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:13:34,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:13:34,896 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2023-03-30 22:13:34,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 22:13:34,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-03-30 22:13:34,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:13:34,899 INFO L225 Difference]: With dead ends: 67 [2023-03-30 22:13:34,899 INFO L226 Difference]: Without dead ends: 53 [2023-03-30 22:13:34,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:13:34,902 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 122 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:13:34,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 12 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:13:34,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-03-30 22:13:34,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2023-03-30 22:13:34,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 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 22:13:34,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2023-03-30 22:13:34,927 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 22 [2023-03-30 22:13:34,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:13:34,927 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2023-03-30 22:13:34,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:13:34,927 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2023-03-30 22:13:34,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-03-30 22:13:34,929 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:34,929 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:34,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 22:13:35,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:35,135 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:35,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:35,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1187827466, now seen corresponding path program 2 times [2023-03-30 22:13:35,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:35,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543716926] [2023-03-30 22:13:35,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:35,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:35,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:35,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:35,376 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-03-30 22:13:35,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:35,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543716926] [2023-03-30 22:13:35,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543716926] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:13:35,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494057707] [2023-03-30 22:13:35,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:13:35,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:35,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:13:35,383 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:13:35,398 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 22:13:35,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:13:35,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:13:35,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:13:35,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:13:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-30 22:13:35,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:13:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-30 22:13:35,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494057707] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:13:35,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:13:35,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-03-30 22:13:35,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601526696] [2023-03-30 22:13:35,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:13:35,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-30 22:13:35,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:13:35,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-30 22:13:35,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2023-03-30 22:13:35,642 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:13:35,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:13:35,960 INFO L93 Difference]: Finished difference Result 124 states and 170 transitions. [2023-03-30 22:13:35,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 22:13:35,960 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2023-03-30 22:13:35,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:13:35,963 INFO L225 Difference]: With dead ends: 124 [2023-03-30 22:13:35,963 INFO L226 Difference]: Without dead ends: 107 [2023-03-30 22:13:35,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2023-03-30 22:13:35,964 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 301 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:13:35,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 17 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:13:35,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-03-30 22:13:35,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2023-03-30 22:13:35,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 87 states have (on average 1.3793103448275863) internal successors, (120), 87 states have internal predecessors, (120), 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 22:13:35,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2023-03-30 22:13:35,976 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 125 transitions. Word has length 40 [2023-03-30 22:13:35,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:13:35,977 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 125 transitions. [2023-03-30 22:13:35,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:13:35,977 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 125 transitions. [2023-03-30 22:13:35,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-03-30 22:13:35,979 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:35,979 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:35,987 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 22:13:36,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-30 22:13:36,188 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:36,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:36,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1354034853, now seen corresponding path program 3 times [2023-03-30 22:13:36,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:36,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216944547] [2023-03-30 22:13:36,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:36,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:36,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:36,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:36,481 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-03-30 22:13:36,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:36,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216944547] [2023-03-30 22:13:36,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216944547] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:13:36,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627143399] [2023-03-30 22:13:36,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:13:36,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:36,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:13:36,483 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 22:13:36,486 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 22:13:36,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-30 22:13:36,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:13:36,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2023-03-30 22:13:36,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:13:36,612 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 10 treesize of output 8 [2023-03-30 22:13:36,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 18 treesize of output 18 [2023-03-30 22:13:36,701 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 18 treesize of output 20 [2023-03-30 22:13:36,729 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2023-03-30 22:13:36,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:13:36,759 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-30 22:13:36,759 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-03-30 22:13:36,763 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 45 treesize of output 29 [2023-03-30 22:13:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2023-03-30 22:13:36,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627143399] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:13:36,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:13:36,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2023-03-30 22:13:36,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551241200] [2023-03-30 22:13:36,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:13:36,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-30 22:13:36,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:13:36,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-30 22:13:36,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-03-30 22:13:36,836 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:13:37,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:13:37,310 INFO L93 Difference]: Finished difference Result 219 states and 301 transitions. [2023-03-30 22:13:37,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-03-30 22:13:37,310 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2023-03-30 22:13:37,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:13:37,311 INFO L225 Difference]: With dead ends: 219 [2023-03-30 22:13:37,311 INFO L226 Difference]: Without dead ends: 137 [2023-03-30 22:13:37,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=812, Unknown=0, NotChecked=0, Total=1190 [2023-03-30 22:13:37,313 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 307 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:13:37,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 50 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:13:37,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-03-30 22:13:37,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 116. [2023-03-30 22:13:37,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 110 states have (on average 1.3) internal successors, (143), 110 states have internal predecessors, (143), 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 22:13:37,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 148 transitions. [2023-03-30 22:13:37,325 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 148 transitions. Word has length 79 [2023-03-30 22:13:37,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:13:37,325 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 148 transitions. [2023-03-30 22:13:37,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:13:37,325 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 148 transitions. [2023-03-30 22:13:37,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-03-30 22:13:37,326 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:37,326 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:37,332 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 22:13:37,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:37,532 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:37,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:37,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1785009770, now seen corresponding path program 1 times [2023-03-30 22:13:37,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:37,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471284260] [2023-03-30 22:13:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:37,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:37,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-03-30 22:13:37,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:37,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471284260] [2023-03-30 22:13:37,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471284260] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:13:37,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317023460] [2023-03-30 22:13:37,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:37,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:37,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:13:37,832 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 22:13:37,858 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 22:13:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:37,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-30 22:13:37,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:13:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-03-30 22:13:38,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:13:38,216 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-03-30 22:13:38,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317023460] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:13:38,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:13:38,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-03-30 22:13:38,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299601175] [2023-03-30 22:13:38,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:13:38,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-03-30 22:13:38,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:13:38,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-03-30 22:13:38,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-03-30 22:13:38,219 INFO L87 Difference]: Start difference. First operand 116 states and 148 transitions. Second operand has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 25 states have internal predecessors, (121), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:13:38,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:13:38,815 INFO L93 Difference]: Finished difference Result 288 states and 384 transitions. [2023-03-30 22:13:38,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-03-30 22:13:38,815 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 25 states have internal predecessors, (121), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2023-03-30 22:13:38,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:13:38,817 INFO L225 Difference]: With dead ends: 288 [2023-03-30 22:13:38,817 INFO L226 Difference]: Without dead ends: 259 [2023-03-30 22:13:38,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2023-03-30 22:13:38,819 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 728 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-30 22:13:38,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 17 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-30 22:13:38,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-03-30 22:13:38,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 227. [2023-03-30 22:13:38,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 221 states have (on average 1.3122171945701357) internal successors, (290), 221 states have internal predecessors, (290), 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 22:13:38,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 295 transitions. [2023-03-30 22:13:38,835 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 295 transitions. Word has length 82 [2023-03-30 22:13:38,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:13:38,835 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 295 transitions. [2023-03-30 22:13:38,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 25 states have internal predecessors, (121), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:13:38,835 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 295 transitions. [2023-03-30 22:13:38,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-03-30 22:13:38,837 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:38,837 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:38,845 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 22:13:39,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:39,043 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:39,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:39,044 INFO L85 PathProgramCache]: Analyzing trace with hash 362963515, now seen corresponding path program 2 times [2023-03-30 22:13:39,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:39,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053068521] [2023-03-30 22:13:39,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:39,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:39,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:39,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-03-30 22:13:39,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:39,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053068521] [2023-03-30 22:13:39,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053068521] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:13:39,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487178653] [2023-03-30 22:13:39,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:13:39,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:39,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:13:39,695 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 22:13:39,722 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 22:13:39,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:13:39,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:13:39,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 24 conjunts are in the unsatisfiable core [2023-03-30 22:13:39,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:13:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-03-30 22:13:39,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:13:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-03-30 22:13:40,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487178653] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:13:40,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:13:40,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2023-03-30 22:13:40,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597372645] [2023-03-30 22:13:40,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:13:40,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-03-30 22:13:40,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:13:40,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-03-30 22:13:40,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2023-03-30 22:13:40,715 INFO L87 Difference]: Start difference. First operand 227 states and 295 transitions. Second operand has 50 states, 50 states have (on average 4.82) internal successors, (241), 49 states have internal predecessors, (241), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:13:42,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:13:42,618 INFO L93 Difference]: Finished difference Result 567 states and 766 transitions. [2023-03-30 22:13:42,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-03-30 22:13:42,619 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.82) internal successors, (241), 49 states have internal predecessors, (241), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2023-03-30 22:13:42,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:13:42,623 INFO L225 Difference]: With dead ends: 567 [2023-03-30 22:13:42,623 INFO L226 Difference]: Without dead ends: 523 [2023-03-30 22:13:42,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2023-03-30 22:13:42,627 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1737 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1737 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-30 22:13:42,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1737 Valid, 17 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-30 22:13:42,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2023-03-30 22:13:42,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 455. [2023-03-30 22:13:42,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 449 states have (on average 1.3140311804008908) internal successors, (590), 449 states have internal predecessors, (590), 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 22:13:42,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 595 transitions. [2023-03-30 22:13:42,654 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 595 transitions. Word has length 157 [2023-03-30 22:13:42,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:13:42,655 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 595 transitions. [2023-03-30 22:13:42,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.82) internal successors, (241), 49 states have internal predecessors, (241), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:13:42,655 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 595 transitions. [2023-03-30 22:13:42,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2023-03-30 22:13:42,666 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:42,666 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:42,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-03-30 22:13:42,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:42,872 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:42,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:42,872 INFO L85 PathProgramCache]: Analyzing trace with hash -35745925, now seen corresponding path program 3 times [2023-03-30 22:13:42,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:42,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565539507] [2023-03-30 22:13:42,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:42,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:45,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:45,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6026 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2023-03-30 22:13:45,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:45,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565539507] [2023-03-30 22:13:45,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565539507] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:13:45,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524651487] [2023-03-30 22:13:45,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:13:45,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:45,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:13:45,217 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 22:13:45,220 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 22:13:47,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-03-30 22:13:47,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:13:47,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 25 conjunts are in the unsatisfiable core [2023-03-30 22:13:47,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:13:47,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6026 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2023-03-30 22:13:47,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:13:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6026 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2023-03-30 22:13:48,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524651487] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:13:48,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:13:48,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 26, 26] total 75 [2023-03-30 22:13:48,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984707464] [2023-03-30 22:13:48,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:13:48,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-03-30 22:13:48,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:13:48,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-03-30 22:13:48,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2023-03-30 22:13:48,985 INFO L87 Difference]: Start difference. First operand 455 states and 595 transitions. Second operand has 75 states, 75 states have (on average 5.253333333333333) internal successors, (394), 74 states have internal predecessors, (394), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:13:52,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:13:52,485 INFO L93 Difference]: Finished difference Result 887 states and 1179 transitions. [2023-03-30 22:13:52,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-03-30 22:13:52,486 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 5.253333333333333) internal successors, (394), 74 states have internal predecessors, (394), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 313 [2023-03-30 22:13:52,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:13:52,490 INFO L225 Difference]: With dead ends: 887 [2023-03-30 22:13:52,490 INFO L226 Difference]: Without dead ends: 807 [2023-03-30 22:13:52,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 674 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2991 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=7958, Invalid=13212, Unknown=0, NotChecked=0, Total=21170 [2023-03-30 22:13:52,495 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2201 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2202 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-30 22:13:52,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2202 Valid, 32 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-30 22:13:52,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2023-03-30 22:13:52,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 799. [2023-03-30 22:13:52,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 793 states have (on average 1.2723833543505674) internal successors, (1009), 793 states have internal predecessors, (1009), 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 22:13:52,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1014 transitions. [2023-03-30 22:13:52,541 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1014 transitions. Word has length 313 [2023-03-30 22:13:52,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:13:52,542 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 1014 transitions. [2023-03-30 22:13:52,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 5.253333333333333) internal successors, (394), 74 states have internal predecessors, (394), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:13:52,542 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1014 transitions. [2023-03-30 22:13:52,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2023-03-30 22:13:52,551 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:13:52,552 INFO L195 NwaCegarLoop]: trace histogram [72, 71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:13:52,565 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 22:13:52,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:52,762 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:13:52,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:13:52,763 INFO L85 PathProgramCache]: Analyzing trace with hash 83911764, now seen corresponding path program 4 times [2023-03-30 22:13:52,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:13:52,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092568225] [2023-03-30 22:13:52,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:13:52,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:13:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:57,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:13:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:13:57,405 INFO L134 CoverageAnalysis]: Checked inductivity of 20093 backedges. 0 proven. 12496 refuted. 0 times theorem prover too weak. 7597 trivial. 0 not checked. [2023-03-30 22:13:57,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:13:57,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092568225] [2023-03-30 22:13:57,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092568225] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:13:57,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879026635] [2023-03-30 22:13:57,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-30 22:13:57,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:13:57,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:13:57,406 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 22:13:57,408 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 22:13:57,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-30 22:13:57,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:13:57,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 1378 conjuncts, 73 conjunts are in the unsatisfiable core [2023-03-30 22:13:57,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:13:58,172 INFO L134 CoverageAnalysis]: Checked inductivity of 20093 backedges. 0 proven. 12496 refuted. 0 times theorem prover too weak. 7597 trivial. 0 not checked. [2023-03-30 22:13:58,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:14:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 20093 backedges. 0 proven. 12496 refuted. 0 times theorem prover too weak. 7597 trivial. 0 not checked. [2023-03-30 22:14:03,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879026635] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:14:03,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:14:03,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 148 [2023-03-30 22:14:03,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85993047] [2023-03-30 22:14:03,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:14:03,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2023-03-30 22:14:03,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:14:03,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2023-03-30 22:14:03,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2023-03-30 22:14:03,571 INFO L87 Difference]: Start difference. First operand 799 states and 1014 transitions. Second operand has 148 states, 148 states have (on average 4.9391891891891895) internal successors, (731), 147 states have internal predecessors, (731), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:14:20,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:14:20,531 INFO L93 Difference]: Finished difference Result 1825 states and 2405 transitions. [2023-03-30 22:14:20,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2023-03-30 22:14:20,532 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 4.9391891891891895) internal successors, (731), 147 states have internal predecessors, (731), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 582 [2023-03-30 22:14:20,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:14:20,537 INFO L225 Difference]: With dead ends: 1825 [2023-03-30 22:14:20,537 INFO L226 Difference]: Without dead ends: 1601 [2023-03-30 22:14:20,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1383 GetRequests, 1093 SyntacticMatches, 0 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13278 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=31902, Invalid=53070, Unknown=0, NotChecked=0, Total=84972 [2023-03-30 22:14:20,545 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5223 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1806 mSolverCounterSat, 847 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5223 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 2653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 847 IncrementalHoareTripleChecker+Valid, 1806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:14:20,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5223 Valid, 37 Invalid, 2653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [847 Valid, 1806 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-03-30 22:14:20,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2023-03-30 22:14:20,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1386. [2023-03-30 22:14:20,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1380 states have (on average 1.315217391304348) internal successors, (1815), 1380 states have internal predecessors, (1815), 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 22:14:20,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 1820 transitions. [2023-03-30 22:14:20,619 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 1820 transitions. Word has length 582 [2023-03-30 22:14:20,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:14:20,621 INFO L495 AbstractCegarLoop]: Abstraction has 1386 states and 1820 transitions. [2023-03-30 22:14:20,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 4.9391891891891895) internal successors, (731), 147 states have internal predecessors, (731), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:14:20,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 1820 transitions. [2023-03-30 22:14:20,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 951 [2023-03-30 22:14:20,655 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:14:20,655 INFO L195 NwaCegarLoop]: trace histogram [144, 144, 144, 144, 144, 73, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:14:20,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-30 22:14:20,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:14:20,863 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:14:20,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:14:20,864 INFO L85 PathProgramCache]: Analyzing trace with hash -745248278, now seen corresponding path program 5 times [2023-03-30 22:14:20,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:14:20,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995760644] [2023-03-30 22:14:20,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:14:20,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:14:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat