/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:05:05,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:05:05,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:05:05,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 22:05:05,533 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 22:05:05,562 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:05:05,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:05:05,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:05:05,563 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:05:05,564 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:05:05,565 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:05:05,565 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:05:05,565 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:05:05,566 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:05:05,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:05:05,567 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:05:05,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:05:05,567 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:05:05,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:05:05,567 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:05:05,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:05:05,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:05:05,568 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:05:05,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:05:05,568 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:05:05,568 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:05:05,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:05:05,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:05:05,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:05:05,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:05:05,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:05:05,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:05:05,569 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:05:05,569 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:05:05,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:05:05,570 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:05:05,570 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:05:05,570 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:05:05,570 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:05:05,570 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:05:05,570 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:05:05,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:05:05,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:05:05,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:05:05,812 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:05:05,812 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:05:05,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2023-03-30 22:05:06,977 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:05:07,144 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:05:07,145 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2023-03-30 22:05:07,149 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83a6f7c5b/dc0f6167af9244f4a9fb52db2b7b68ee/FLAG4f4f506fa [2023-03-30 22:05:07,166 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83a6f7c5b/dc0f6167af9244f4a9fb52db2b7b68ee [2023-03-30 22:05:07,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:05:07,170 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:05:07,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:05:07,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:05:07,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:05:07,175 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:05:07" (1/1) ... [2023-03-30 22:05:07,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@665ea2fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:05:07, skipping insertion in model container [2023-03-30 22:05:07,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:05:07" (1/1) ... [2023-03-30 22:05:07,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:05:07,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:05:07,353 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i[817,830] [2023-03-30 22:05:07,371 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:05:07,381 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:05:07,394 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i[817,830] [2023-03-30 22:05:07,408 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:05:07,421 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:05:07,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:05:07 WrapperNode [2023-03-30 22:05:07,421 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:05:07,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:05:07,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:05:07,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:05:07,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:05:07" (1/1) ... [2023-03-30 22:05:07,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:05:07" (1/1) ... [2023-03-30 22:05:07,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:05:07" (1/1) ... [2023-03-30 22:05:07,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:05:07" (1/1) ... [2023-03-30 22:05:07,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:05:07" (1/1) ... [2023-03-30 22:05:07,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:05:07" (1/1) ... [2023-03-30 22:05:07,462 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:05:07" (1/1) ... [2023-03-30 22:05:07,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:05:07" (1/1) ... [2023-03-30 22:05:07,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:05:07,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:05:07,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:05:07,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:05:07,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:05:07" (1/1) ... [2023-03-30 22:05:07,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:05:07,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:05:07,493 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 22:05:07,509 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 22:05:07,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:05:07,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:05:07,544 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:05:07,545 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-30 22:05:07,545 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:05:07,545 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:05:07,545 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:05:07,545 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-30 22:05:07,545 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-30 22:05:07,545 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:05:07,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:05:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-30 22:05:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:05:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:05:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-30 22:05:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:05:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:05:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:05:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:05:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:05:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:05:07,606 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:05:07,608 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:05:07,779 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:05:07,814 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:05:07,814 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-03-30 22:05:07,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:05:07 BoogieIcfgContainer [2023-03-30 22:05:07,816 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:05:07,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:05:07,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:05:07,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:05:07,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:05:07" (1/3) ... [2023-03-30 22:05:07,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5f1064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:05:07, skipping insertion in model container [2023-03-30 22:05:07,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:05:07" (2/3) ... [2023-03-30 22:05:07,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5f1064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:05:07, skipping insertion in model container [2023-03-30 22:05:07,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:05:07" (3/3) ... [2023-03-30 22:05:07,823 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2023-03-30 22:05:07,855 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:05:07,855 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:05:07,897 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:05:07,911 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;@19331a9f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:05:07,912 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:05:07,915 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 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 22:05:07,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-03-30 22:05:07,922 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:07,923 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:05:07,923 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:07,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:07,928 INFO L85 PathProgramCache]: Analyzing trace with hash 981523330, now seen corresponding path program 1 times [2023-03-30 22:05:07,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:07,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325411495] [2023-03-30 22:05:07,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:07,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:08,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:08,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:08,177 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 22:05:08,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:08,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325411495] [2023-03-30 22:05:08,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325411495] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:05:08,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:05:08,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:05:08,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701112336] [2023-03-30 22:05:08,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:05:08,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:05:08,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:08,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:05:08,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:05:08,223 INFO L87 Difference]: Start difference. First operand has 32 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 22:05:08,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:05:08,373 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2023-03-30 22:05:08,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:05:08,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 16 [2023-03-30 22:05:08,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:05:08,388 INFO L225 Difference]: With dead ends: 56 [2023-03-30 22:05:08,388 INFO L226 Difference]: Without dead ends: 27 [2023-03-30 22:05:08,391 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 22:05:08,394 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:05:08,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 10 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:05:08,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-03-30 22:05:08,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-03-30 22:05:08,435 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 22:05:08,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-03-30 22:05:08,439 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2023-03-30 22:05:08,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:05:08,440 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-03-30 22:05:08,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 22:05:08,441 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-03-30 22:05:08,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-03-30 22:05:08,442 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:08,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:05:08,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:05:08,443 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:08,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:08,445 INFO L85 PathProgramCache]: Analyzing trace with hash 730672319, now seen corresponding path program 1 times [2023-03-30 22:05:08,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:08,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770697079] [2023-03-30 22:05:08,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:08,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:08,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:08,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:08,550 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 22:05:08,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:08,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770697079] [2023-03-30 22:05:08,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770697079] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:05:08,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:05:08,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 22:05:08,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145367779] [2023-03-30 22:05:08,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:05:08,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:05:08,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:08,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:05:08,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:05:08,554 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 22:05:08,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:05:08,658 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2023-03-30 22:05:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 22:05:08,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 16 [2023-03-30 22:05:08,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:05:08,660 INFO L225 Difference]: With dead ends: 48 [2023-03-30 22:05:08,661 INFO L226 Difference]: Without dead ends: 29 [2023-03-30 22:05:08,665 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 22:05:08,669 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:05:08,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 12 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:05:08,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-03-30 22:05:08,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-03-30 22:05:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 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 22:05:08,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-03-30 22:05:08,687 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 16 [2023-03-30 22:05:08,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:05:08,688 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-03-30 22:05:08,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 22:05:08,688 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-03-30 22:05:08,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-30 22:05:08,689 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:08,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:05:08,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:05:08,689 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:08,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:08,691 INFO L85 PathProgramCache]: Analyzing trace with hash -157742879, now seen corresponding path program 1 times [2023-03-30 22:05:08,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:08,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628612239] [2023-03-30 22:05:08,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:08,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:08,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:05:08,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:08,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628612239] [2023-03-30 22:05:08,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628612239] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:05:08,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904456749] [2023-03-30 22:05:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:08,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:08,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:05:08,815 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 22:05:08,816 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 22:05:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:08,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-30 22:05:08,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:05:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:05:08,915 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:05:08,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904456749] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:05:08,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:05:08,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-03-30 22:05:08,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523268746] [2023-03-30 22:05:08,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:05:08,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:05:08,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:08,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:05:08,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:05:08,921 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:08,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:05:08,952 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2023-03-30 22:05:08,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 22:05:08,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-03-30 22:05:08,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:05:08,953 INFO L225 Difference]: With dead ends: 47 [2023-03-30 22:05:08,953 INFO L226 Difference]: Without dead ends: 34 [2023-03-30 22:05:08,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:05:08,954 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:05:08,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 71 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:05:08,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-03-30 22:05:08,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2023-03-30 22:05:08,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:05:08,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-03-30 22:05:08,960 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2023-03-30 22:05:08,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:05:08,960 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-03-30 22:05:08,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:08,961 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-03-30 22:05:08,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-30 22:05:08,961 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:08,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:05:08,970 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 22:05:09,168 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 22:05:09,168 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:09,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:09,169 INFO L85 PathProgramCache]: Analyzing trace with hash -606723, now seen corresponding path program 1 times [2023-03-30 22:05:09,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:09,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082234727] [2023-03-30 22:05:09,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:09,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:09,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:05:09,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:09,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082234727] [2023-03-30 22:05:09,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082234727] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:05:09,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703911103] [2023-03-30 22:05:09,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:09,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:09,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:05:09,274 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 22:05:09,277 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 22:05:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:09,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-30 22:05:09,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:05:09,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:05:09,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:05:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:05:09,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703911103] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:05:09,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:05:09,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-03-30 22:05:09,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067207471] [2023-03-30 22:05:09,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:05:09,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 22:05:09,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:09,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 22:05:09,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:05:09,415 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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 22:05:09,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:05:09,592 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2023-03-30 22:05:09,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 22:05:09,592 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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 21 [2023-03-30 22:05:09,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:05:09,595 INFO L225 Difference]: With dead ends: 79 [2023-03-30 22:05:09,595 INFO L226 Difference]: Without dead ends: 59 [2023-03-30 22:05:09,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 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 22:05:09,599 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:05:09,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 17 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:05:09,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-03-30 22:05:09,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 35. [2023-03-30 22:05:09,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 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 22:05:09,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-03-30 22:05:09,621 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 21 [2023-03-30 22:05:09,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:05:09,621 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-03-30 22:05:09,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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 22:05:09,621 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-03-30 22:05:09,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-30 22:05:09,623 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:09,624 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:05:09,632 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 22:05:09,829 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 22:05:09,829 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:09,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:09,830 INFO L85 PathProgramCache]: Analyzing trace with hash 424831703, now seen corresponding path program 2 times [2023-03-30 22:05:09,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:09,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290369502] [2023-03-30 22:05:09,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:09,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:09,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:09,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-30 22:05:09,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:09,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290369502] [2023-03-30 22:05:09,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290369502] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:05:09,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:05:09,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-30 22:05:09,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105135327] [2023-03-30 22:05:09,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:05:09,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:05:09,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:09,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:05:09,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-30 22:05:09,940 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 22:05:10,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:05:10,043 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2023-03-30 22:05:10,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 22:05:10,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 27 [2023-03-30 22:05:10,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:05:10,044 INFO L225 Difference]: With dead ends: 60 [2023-03-30 22:05:10,044 INFO L226 Difference]: Without dead ends: 42 [2023-03-30 22:05:10,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:05:10,047 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 49 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:05:10,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 17 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:05:10,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-03-30 22:05:10,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2023-03-30 22:05:10,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 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 22:05:10,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2023-03-30 22:05:10,057 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 27 [2023-03-30 22:05:10,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:05:10,057 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2023-03-30 22:05:10,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 22:05:10,058 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2023-03-30 22:05:10,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-03-30 22:05:10,058 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:10,059 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:05:10,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-30 22:05:10,059 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:10,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:10,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1006955424, now seen corresponding path program 1 times [2023-03-30 22:05:10,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:10,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111632421] [2023-03-30 22:05:10,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:10,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:10,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-30 22:05:10,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:10,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111632421] [2023-03-30 22:05:10,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111632421] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:05:10,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172981181] [2023-03-30 22:05:10,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:10,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:10,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:05:10,229 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 22:05:10,232 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 22:05:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:10,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:05:10,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:05:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-30 22:05:10,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:05:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-30 22:05:10,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172981181] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:05:10,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:05:10,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2023-03-30 22:05:10,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682137075] [2023-03-30 22:05:10,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:05:10,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-03-30 22:05:10,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:10,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-03-30 22:05:10,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2023-03-30 22:05:10,458 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 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 22:05:10,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:05:10,858 INFO L93 Difference]: Finished difference Result 109 states and 148 transitions. [2023-03-30 22:05:10,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-30 22:05:10,858 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 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 30 [2023-03-30 22:05:10,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:05:10,862 INFO L225 Difference]: With dead ends: 109 [2023-03-30 22:05:10,862 INFO L226 Difference]: Without dead ends: 88 [2023-03-30 22:05:10,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=303, Invalid=567, Unknown=0, NotChecked=0, Total=870 [2023-03-30 22:05:10,864 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 271 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:05:10,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 27 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:05:10,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-03-30 22:05:10,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-03-30 22:05:10,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 82 states have internal predecessors, (104), 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 22:05:10,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2023-03-30 22:05:10,889 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 30 [2023-03-30 22:05:10,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:05:10,890 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2023-03-30 22:05:10,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 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 22:05:10,890 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2023-03-30 22:05:10,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-03-30 22:05:10,891 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:10,892 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:05:10,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 22:05:11,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:11,097 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:11,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:11,098 INFO L85 PathProgramCache]: Analyzing trace with hash 2054705388, now seen corresponding path program 2 times [2023-03-30 22:05:11,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:11,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118670074] [2023-03-30 22:05:11,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:11,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:11,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:11,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-03-30 22:05:11,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:11,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118670074] [2023-03-30 22:05:11,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118670074] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:05:11,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065129939] [2023-03-30 22:05:11,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:05:11,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:11,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:05:11,333 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 22:05:11,336 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 22:05:11,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:05:11,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:05:11,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-30 22:05:11,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:05:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-03-30 22:05:11,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:05:11,678 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-03-30 22:05:11,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065129939] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:05:11,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:05:11,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-03-30 22:05:11,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403160046] [2023-03-30 22:05:11,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:05:11,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-03-30 22:05:11,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:11,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-03-30 22:05:11,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-03-30 22:05:11,681 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 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 22:05:12,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:05:12,482 INFO L93 Difference]: Finished difference Result 317 states and 430 transitions. [2023-03-30 22:05:12,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-03-30 22:05:12,483 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 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 66 [2023-03-30 22:05:12,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:05:12,485 INFO L225 Difference]: With dead ends: 317 [2023-03-30 22:05:12,485 INFO L226 Difference]: Without dead ends: 256 [2023-03-30 22:05:12,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 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 22:05:12,487 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 848 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-30 22:05:12,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [849 Valid, 22 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-30 22:05:12,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-03-30 22:05:12,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 112. [2023-03-30 22:05:12,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.2075471698113207) internal successors, (128), 106 states have internal predecessors, (128), 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 22:05:12,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2023-03-30 22:05:12,521 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 66 [2023-03-30 22:05:12,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:05:12,523 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2023-03-30 22:05:12,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 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 22:05:12,523 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2023-03-30 22:05:12,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-03-30 22:05:12,527 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:12,528 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:05:12,540 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 22:05:12,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:12,738 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:12,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:12,739 INFO L85 PathProgramCache]: Analyzing trace with hash -707613820, now seen corresponding path program 3 times [2023-03-30 22:05:12,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:12,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547657007] [2023-03-30 22:05:12,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:12,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:12,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:13,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-03-30 22:05:13,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:13,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547657007] [2023-03-30 22:05:13,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547657007] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:05:13,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156976004] [2023-03-30 22:05:13,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:05:13,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:13,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:05:13,441 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 22:05:13,443 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 22:05:13,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-30 22:05:13,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:05:13,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-30 22:05:13,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:05:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 584 trivial. 0 not checked. [2023-03-30 22:05:13,634 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:05:13,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156976004] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:05:13,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:05:13,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [26] total 30 [2023-03-30 22:05:13,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156020305] [2023-03-30 22:05:13,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:05:13,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 22:05:13,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:13,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 22:05:13,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2023-03-30 22:05:13,636 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:13,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:05:13,729 INFO L93 Difference]: Finished difference Result 205 states and 267 transitions. [2023-03-30 22:05:13,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-30 22:05:13,729 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2023-03-30 22:05:13,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:05:13,731 INFO L225 Difference]: With dead ends: 205 [2023-03-30 22:05:13,731 INFO L226 Difference]: Without dead ends: 192 [2023-03-30 22:05:13,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2023-03-30 22:05:13,733 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:05:13,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 86 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:05:13,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-03-30 22:05:13,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 113. [2023-03-30 22:05:13,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 107 states have internal predecessors, (130), 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 22:05:13,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 135 transitions. [2023-03-30 22:05:13,754 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 135 transitions. Word has length 90 [2023-03-30 22:05:13,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:05:13,756 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 135 transitions. [2023-03-30 22:05:13,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:13,757 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 135 transitions. [2023-03-30 22:05:13,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-03-30 22:05:13,772 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:13,772 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:05:13,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 22:05:13,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:13,978 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:13,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:13,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1290489811, now seen corresponding path program 4 times [2023-03-30 22:05:13,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:13,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712087692] [2023-03-30 22:05:13,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:13,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:14,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:14,628 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-03-30 22:05:14,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:14,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712087692] [2023-03-30 22:05:14,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712087692] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:05:14,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279693892] [2023-03-30 22:05:14,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-30 22:05:14,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:14,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:05:14,630 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 22:05:14,632 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 22:05:14,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-30 22:05:14,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:05:14,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 24 conjunts are in the unsatisfiable core [2023-03-30 22:05:14,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:05:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-03-30 22:05:14,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:05:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-03-30 22:05:15,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279693892] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:05:15,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:05:15,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2023-03-30 22:05:15,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974512018] [2023-03-30 22:05:15,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:05:15,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-03-30 22:05:15,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:15,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-03-30 22:05:15,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2023-03-30 22:05:15,549 INFO L87 Difference]: Start difference. First operand 113 states and 135 transitions. Second operand has 50 states, 50 states have (on average 2.24) internal successors, (112), 49 states have internal predecessors, (112), 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 22:05:17,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:05:17,846 INFO L93 Difference]: Finished difference Result 765 states and 1048 transitions. [2023-03-30 22:05:17,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-03-30 22:05:17,847 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.24) internal successors, (112), 49 states have internal predecessors, (112), 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 93 [2023-03-30 22:05:17,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:05:17,851 INFO L225 Difference]: With dead ends: 765 [2023-03-30 22:05:17,851 INFO L226 Difference]: Without dead ends: 703 [2023-03-30 22:05:17,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2023-03-30 22:05:17,858 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2316 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2317 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-30 22:05:17,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2317 Valid, 47 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-30 22:05:17,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2023-03-30 22:05:17,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 161. [2023-03-30 22:05:17,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 155 states have (on average 1.1483870967741936) internal successors, (178), 155 states have internal predecessors, (178), 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 22:05:17,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 183 transitions. [2023-03-30 22:05:17,889 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 183 transitions. Word has length 93 [2023-03-30 22:05:17,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:05:17,890 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 183 transitions. [2023-03-30 22:05:17,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.24) internal successors, (112), 49 states have internal predecessors, (112), 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 22:05:17,890 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 183 transitions. [2023-03-30 22:05:17,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-03-30 22:05:17,892 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:17,892 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:05:17,903 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 22:05:18,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:18,098 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:18,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:18,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1957944157, now seen corresponding path program 5 times [2023-03-30 22:05:18,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:18,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317008891] [2023-03-30 22:05:18,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:18,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:19,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:19,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-03-30 22:05:19,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:19,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317008891] [2023-03-30 22:05:19,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317008891] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:05:19,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584731473] [2023-03-30 22:05:19,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-30 22:05:19,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:19,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:05:19,889 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 22:05:19,915 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 22:05:33,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2023-03-30 22:05:33,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:05:33,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-30 22:05:33,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:05:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 120 proven. 15 refuted. 0 times theorem prover too weak. 2119 trivial. 0 not checked. [2023-03-30 22:05:33,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:05:34,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 127 proven. 8 refuted. 0 times theorem prover too weak. 2119 trivial. 0 not checked. [2023-03-30 22:05:34,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584731473] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:05:34,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:05:34,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 13, 13] total 72 [2023-03-30 22:05:34,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136979831] [2023-03-30 22:05:34,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:05:34,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-03-30 22:05:34,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:34,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-03-30 22:05:34,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1381, Invalid=3731, Unknown=0, NotChecked=0, Total=5112 [2023-03-30 22:05:34,122 INFO L87 Difference]: Start difference. First operand 161 states and 183 transitions. Second operand has 72 states, 72 states have (on average 2.3333333333333335) internal successors, (168), 71 states have internal predecessors, (168), 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 22:05:41,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:05:41,453 INFO L93 Difference]: Finished difference Result 580 states and 862 transitions. [2023-03-30 22:05:41,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2023-03-30 22:05:41,454 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.3333333333333335) internal successors, (168), 71 states have internal predecessors, (168), 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 141 [2023-03-30 22:05:41,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:05:41,457 INFO L225 Difference]: With dead ends: 580 [2023-03-30 22:05:41,457 INFO L226 Difference]: Without dead ends: 518 [2023-03-30 22:05:41,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19124 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=17674, Invalid=46588, Unknown=0, NotChecked=0, Total=64262 [2023-03-30 22:05:41,470 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4080 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 993 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4080 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 993 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:05:41,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4080 Valid, 52 Invalid, 2022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [993 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-30 22:05:41,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2023-03-30 22:05:41,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 509. [2023-03-30 22:05:41,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 503 states have (on average 1.268389662027833) internal successors, (638), 503 states have internal predecessors, (638), 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 22:05:41,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 643 transitions. [2023-03-30 22:05:41,624 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 643 transitions. Word has length 141 [2023-03-30 22:05:41,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:05:41,624 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 643 transitions. [2023-03-30 22:05:41,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.3333333333333335) internal successors, (168), 71 states have internal predecessors, (168), 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 22:05:41,624 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 643 transitions. [2023-03-30 22:05:41,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2023-03-30 22:05:41,631 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:41,632 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 47, 47, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:05:41,648 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 22:05:41,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:41,847 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:41,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:41,847 INFO L85 PathProgramCache]: Analyzing trace with hash 334529330, now seen corresponding path program 6 times [2023-03-30 22:05:41,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:41,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702134381] [2023-03-30 22:05:41,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:41,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:44,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:44,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:44,838 INFO L134 CoverageAnalysis]: Checked inductivity of 19980 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 17771 trivial. 0 not checked. [2023-03-30 22:05:44,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:44,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702134381] [2023-03-30 22:05:44,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702134381] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:05:44,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820187046] [2023-03-30 22:05:44,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-03-30 22:05:44,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:44,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:05:44,840 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:05:44,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-30 22:05:45,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-03-30 22:05:45,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:05:45,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-30 22:05:45,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:05:45,301 INFO L134 CoverageAnalysis]: Checked inductivity of 19980 backedges. 7686 proven. 26 refuted. 0 times theorem prover too weak. 12268 trivial. 0 not checked. [2023-03-30 22:05:45,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:05:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 19980 backedges. 7690 proven. 22 refuted. 0 times theorem prover too weak. 12268 trivial. 0 not checked. [2023-03-30 22:05:45,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820187046] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:05:45,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:05:45,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 10, 10] total 63 [2023-03-30 22:05:45,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886794491] [2023-03-30 22:05:45,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:05:45,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-03-30 22:05:45,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:45,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-03-30 22:05:45,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1269, Invalid=2637, Unknown=0, NotChecked=0, Total=3906 [2023-03-30 22:05:45,562 INFO L87 Difference]: Start difference. First operand 509 states and 643 transitions. Second operand has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 62 states have internal predecessors, (149), 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 22:06:03,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:06:03,691 INFO L93 Difference]: Finished difference Result 1497 states and 2044 transitions. [2023-03-30 22:06:03,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 427 states. [2023-03-30 22:06:03,691 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 62 states have internal predecessors, (149), 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 503 [2023-03-30 22:06:03,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:06:03,695 INFO L225 Difference]: With dead ends: 1497 [2023-03-30 22:06:03,696 INFO L226 Difference]: Without dead ends: 1089 [2023-03-30 22:06:03,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1728 GetRequests, 1239 SyntacticMatches, 4 SemanticMatches, 485 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95892 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=46669, Invalid=190013, Unknown=0, NotChecked=0, Total=236682 [2023-03-30 22:06:03,720 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7478 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7478 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:06:03,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7478 Valid, 62 Invalid, 1666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [640 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-30 22:06:03,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2023-03-30 22:06:03,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 693. [2023-03-30 22:06:03,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 687 states have (on average 1.2838427947598254) internal successors, (882), 687 states have internal predecessors, (882), 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 22:06:03,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 887 transitions. [2023-03-30 22:06:03,928 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 887 transitions. Word has length 503 [2023-03-30 22:06:03,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:06:03,929 INFO L495 AbstractCegarLoop]: Abstraction has 693 states and 887 transitions. [2023-03-30 22:06:03,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 62 states have internal predecessors, (149), 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 22:06:03,929 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 887 transitions. [2023-03-30 22:06:03,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2023-03-30 22:06:03,941 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:06:03,941 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 48, 48, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:06:03,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0