/usr/lib/jvm/java-1.11.0-openjdk-amd64/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 --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 18:18:37,228 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 18:18:37,312 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 18:18:37,315 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 18:18:37,315 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 18:18:37,343 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 18:18:37,343 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 18:18:37,344 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 18:18:37,344 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 18:18:37,348 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 18:18:37,348 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 18:18:37,349 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 18:18:37,349 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 18:18:37,350 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 18:18:37,350 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 18:18:37,351 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 18:18:37,351 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 18:18:37,351 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 18:18:37,352 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 18:18:37,352 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 18:18:37,353 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 18:18:37,353 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 18:18:37,353 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 18:18:37,353 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 18:18:37,354 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 18:18:37,354 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 18:18:37,354 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 18:18:37,354 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 18:18:37,355 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 18:18:37,355 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 18:18:37,360 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 18:18:37,360 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 18:18:37,360 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 18:18:37,360 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 18:18:37,361 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 18:18:37,361 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 18:18:37,361 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 18:18:37,361 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 18:18:37,361 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 18:18:37,361 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 18:18:37,362 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 18:18:37,362 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 18:18:37,362 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 18:18:37,362 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 18:18:37,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 18:18:37,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 18:18:37,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 18:18:37,628 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 18:18:37,628 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 18:18:37,629 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de52.c [2023-12-19 18:18:38,682 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 18:18:38,850 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 18:18:38,851 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de52.c [2023-12-19 18:18:38,857 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b5eafd47/3ad80ceb5b08496bb4980230f19ec532/FLAGa0f9f853f [2023-12-19 18:18:38,873 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b5eafd47/3ad80ceb5b08496bb4980230f19ec532 [2023-12-19 18:18:38,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 18:18:38,878 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 18:18:38,880 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 18:18:38,880 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 18:18:38,884 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 18:18:38,884 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 06:18:38" (1/1) ... [2023-12-19 18:18:38,886 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36ec6f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:18:38, skipping insertion in model container [2023-12-19 18:18:38,886 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 06:18:38" (1/1) ... [2023-12-19 18:18:38,903 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 18:18:39,002 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de52.c[368,381] [2023-12-19 18:18:39,015 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 18:18:39,024 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 18:18:39,031 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de52.c[368,381] [2023-12-19 18:18:39,035 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 18:18:39,049 INFO L206 MainTranslator]: Completed translation [2023-12-19 18:18:39,049 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:18:39 WrapperNode [2023-12-19 18:18:39,049 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 18:18:39,050 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 18:18:39,050 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 18:18:39,050 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 18:18:39,055 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:18:39" (1/1) ... [2023-12-19 18:18:39,062 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:18:39" (1/1) ... [2023-12-19 18:18:39,083 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2023-12-19 18:18:39,083 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 18:18:39,084 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 18:18:39,084 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 18:18:39,084 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 18:18:39,091 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:18:39" (1/1) ... [2023-12-19 18:18:39,091 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:18:39" (1/1) ... [2023-12-19 18:18:39,095 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:18:39" (1/1) ... [2023-12-19 18:18:39,104 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-19 18:18:39,104 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:18:39" (1/1) ... [2023-12-19 18:18:39,104 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:18:39" (1/1) ... [2023-12-19 18:18:39,106 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:18:39" (1/1) ... [2023-12-19 18:18:39,109 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:18:39" (1/1) ... [2023-12-19 18:18:39,110 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:18:39" (1/1) ... [2023-12-19 18:18:39,110 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:18:39" (1/1) ... [2023-12-19 18:18:39,112 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 18:18:39,113 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 18:18:39,113 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 18:18:39,113 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 18:18:39,115 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:18:39" (1/1) ... [2023-12-19 18:18:39,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 18:18:39,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:18:39,145 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-19 18:18:39,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-19 18:18:39,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 18:18:39,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 18:18:39,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 18:18:39,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 18:18:39,238 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 18:18:39,239 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 18:18:39,391 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 18:18:39,409 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 18:18:39,409 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-12-19 18:18:39,409 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 06:18:39 BoogieIcfgContainer [2023-12-19 18:18:39,409 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 18:18:39,411 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 18:18:39,411 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 18:18:39,414 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 18:18:39,414 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 06:18:38" (1/3) ... [2023-12-19 18:18:39,414 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@401ab5fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 06:18:39, skipping insertion in model container [2023-12-19 18:18:39,414 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:18:39" (2/3) ... [2023-12-19 18:18:39,415 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@401ab5fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 06:18:39, skipping insertion in model container [2023-12-19 18:18:39,415 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 06:18:39" (3/3) ... [2023-12-19 18:18:39,416 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de52.c [2023-12-19 18:18:39,427 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 18:18:39,427 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 18:18:39,455 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 18:18:39,460 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=LoopHeads, 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;@7ddd4c1e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 18:18:39,460 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 18:18:39,468 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:39,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-19 18:18:39,472 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:18:39,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:18:39,473 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:18:39,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:18:39,477 INFO L85 PathProgramCache]: Analyzing trace with hash 577542875, now seen corresponding path program 1 times [2023-12-19 18:18:39,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:18:39,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106245488] [2023-12-19 18:18:39,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:39,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:18:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:18:39,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:18:39,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106245488] [2023-12-19 18:18:39,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106245488] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:18:39,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 18:18:39,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 18:18:39,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213591161] [2023-12-19 18:18:39,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:18:39,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-19 18:18:39,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:18:39,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-19 18:18:39,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 18:18:39,639 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:39,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:18:39,659 INFO L93 Difference]: Finished difference Result 24 states and 42 transitions. [2023-12-19 18:18:39,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-19 18:18:39,661 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-19 18:18:39,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:18:39,669 INFO L225 Difference]: With dead ends: 24 [2023-12-19 18:18:39,670 INFO L226 Difference]: Without dead ends: 11 [2023-12-19 18:18:39,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 18:18:39,674 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:18:39,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:18:39,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-12-19 18:18:39,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-12-19 18:18:39,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:39,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2023-12-19 18:18:39,697 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 10 [2023-12-19 18:18:39,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:18:39,697 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2023-12-19 18:18:39,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:39,698 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2023-12-19 18:18:39,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-19 18:18:39,721 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:18:39,722 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:18:39,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-19 18:18:39,722 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:18:39,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:18:39,723 INFO L85 PathProgramCache]: Analyzing trace with hash 573848791, now seen corresponding path program 1 times [2023-12-19 18:18:39,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:18:39,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417277666] [2023-12-19 18:18:39,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:39,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:18:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:39,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:18:39,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:18:39,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417277666] [2023-12-19 18:18:39,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417277666] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:18:39,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 18:18:39,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 18:18:39,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703252865] [2023-12-19 18:18:39,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:18:39,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 18:18:39,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:18:39,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 18:18:39,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 18:18:39,960 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:40,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:18:40,027 INFO L93 Difference]: Finished difference Result 26 states and 37 transitions. [2023-12-19 18:18:40,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 18:18:40,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-19 18:18:40,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:18:40,028 INFO L225 Difference]: With dead ends: 26 [2023-12-19 18:18:40,029 INFO L226 Difference]: Without dead ends: 17 [2023-12-19 18:18:40,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 18:18:40,031 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:18:40,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 22 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:18:40,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-19 18:18:40,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-19 18:18:40,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:40,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 24 transitions. [2023-12-19 18:18:40,047 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 24 transitions. Word has length 10 [2023-12-19 18:18:40,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:18:40,048 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 24 transitions. [2023-12-19 18:18:40,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:40,049 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 24 transitions. [2023-12-19 18:18:40,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-19 18:18:40,049 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:18:40,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:18:40,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-19 18:18:40,053 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:18:40,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:18:40,054 INFO L85 PathProgramCache]: Analyzing trace with hash 611108754, now seen corresponding path program 1 times [2023-12-19 18:18:40,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:18:40,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696521336] [2023-12-19 18:18:40,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:40,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:18:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:18:40,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:18:40,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696521336] [2023-12-19 18:18:40,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696521336] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:18:40,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 18:18:40,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 18:18:40,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077782950] [2023-12-19 18:18:40,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:18:40,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 18:18:40,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:18:40,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 18:18:40,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 18:18:40,121 INFO L87 Difference]: Start difference. First operand 17 states and 24 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:40,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:18:40,153 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2023-12-19 18:18:40,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 18:18:40,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-19 18:18:40,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:18:40,156 INFO L225 Difference]: With dead ends: 27 [2023-12-19 18:18:40,156 INFO L226 Difference]: Without dead ends: 21 [2023-12-19 18:18:40,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 18:18:40,159 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:18:40,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 17 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:18:40,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-19 18:18:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-19 18:18:40,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 30 transitions. [2023-12-19 18:18:40,173 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 30 transitions. Word has length 11 [2023-12-19 18:18:40,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:18:40,177 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 30 transitions. [2023-12-19 18:18:40,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:40,178 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 30 transitions. [2023-12-19 18:18:40,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-19 18:18:40,178 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:18:40,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:18:40,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-19 18:18:40,179 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:18:40,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:18:40,179 INFO L85 PathProgramCache]: Analyzing trace with hash 656361283, now seen corresponding path program 1 times [2023-12-19 18:18:40,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:18:40,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931272560] [2023-12-19 18:18:40,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:40,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:18:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:40,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:18:40,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:18:40,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931272560] [2023-12-19 18:18:40,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931272560] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:18:40,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 18:18:40,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 18:18:40,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747662126] [2023-12-19 18:18:40,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:18:40,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 18:18:40,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:18:40,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 18:18:40,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 18:18:40,211 INFO L87 Difference]: Start difference. First operand 21 states and 30 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:40,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:18:40,230 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions. [2023-12-19 18:18:40,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 18:18:40,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-19 18:18:40,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:18:40,231 INFO L225 Difference]: With dead ends: 36 [2023-12-19 18:18:40,231 INFO L226 Difference]: Without dead ends: 26 [2023-12-19 18:18:40,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 18:18:40,233 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:18:40,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 16 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:18:40,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-19 18:18:40,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-19 18:18:40,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:40,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2023-12-19 18:18:40,243 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 11 [2023-12-19 18:18:40,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:18:40,243 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2023-12-19 18:18:40,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:40,244 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2023-12-19 18:18:40,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-19 18:18:40,244 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:18:40,245 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:18:40,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-19 18:18:40,245 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:18:40,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:18:40,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1044350857, now seen corresponding path program 1 times [2023-12-19 18:18:40,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:18:40,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904617482] [2023-12-19 18:18:40,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:40,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:18:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 18:18:40,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:18:40,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904617482] [2023-12-19 18:18:40,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904617482] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:18:40,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 18:18:40,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 18:18:40,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773491740] [2023-12-19 18:18:40,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:18:40,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 18:18:40,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:18:40,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 18:18:40,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 18:18:40,320 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:40,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:18:40,349 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2023-12-19 18:18:40,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 18:18:40,349 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-19 18:18:40,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:18:40,350 INFO L225 Difference]: With dead ends: 33 [2023-12-19 18:18:40,350 INFO L226 Difference]: Without dead ends: 22 [2023-12-19 18:18:40,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 18:18:40,351 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:18:40,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 26 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:18:40,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-19 18:18:40,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-19 18:18:40,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:40,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2023-12-19 18:18:40,359 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 12 [2023-12-19 18:18:40,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:18:40,359 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2023-12-19 18:18:40,359 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:40,360 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2023-12-19 18:18:40,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-19 18:18:40,360 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:18:40,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:18:40,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-19 18:18:40,361 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:18:40,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:18:40,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1846839420, now seen corresponding path program 1 times [2023-12-19 18:18:40,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:18:40,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636801429] [2023-12-19 18:18:40,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:40,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:18:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-19 18:18:40,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:18:40,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636801429] [2023-12-19 18:18:40,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636801429] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:18:40,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385794194] [2023-12-19 18:18:40,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:40,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:40,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:18:40,462 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) [2023-12-19 18:18:40,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 18:18:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:40,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 18:18:40,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:18:40,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-19 18:18:40,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:18:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-19 18:18:40,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385794194] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-19 18:18:40,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-19 18:18:40,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-12-19 18:18:40,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872642313] [2023-12-19 18:18:40,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:18:40,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 18:18:40,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:18:40,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 18:18:40,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-12-19 18:18:40,614 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:40,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:18:40,657 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2023-12-19 18:18:40,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 18:18:40,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-19 18:18:40,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:18:40,659 INFO L225 Difference]: With dead ends: 28 [2023-12-19 18:18:40,659 INFO L226 Difference]: Without dead ends: 19 [2023-12-19 18:18:40,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-12-19 18:18:40,662 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:18:40,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 20 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:18:40,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-19 18:18:40,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-12-19 18:18:40,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:40,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2023-12-19 18:18:40,671 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 13 [2023-12-19 18:18:40,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:18:40,671 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2023-12-19 18:18:40,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:40,672 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2023-12-19 18:18:40,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-19 18:18:40,672 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:18:40,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:18:40,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-19 18:18:40,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-19 18:18:40,879 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:18:40,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:18:40,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1991740900, now seen corresponding path program 1 times [2023-12-19 18:18:40,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:18:40,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797278406] [2023-12-19 18:18:40,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:40,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:18:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:40,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-19 18:18:40,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:18:40,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797278406] [2023-12-19 18:18:40,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797278406] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:18:40,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44778283] [2023-12-19 18:18:40,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:40,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:40,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:18:40,993 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) [2023-12-19 18:18:41,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 18:18:41,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:41,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 18:18:41,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:18:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 18:18:41,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:18:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-19 18:18:41,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44778283] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-19 18:18:41,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-19 18:18:41,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4] total 8 [2023-12-19 18:18:41,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579734986] [2023-12-19 18:18:41,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:18:41,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 18:18:41,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:18:41,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 18:18:41,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-12-19 18:18:41,088 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:41,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:18:41,113 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2023-12-19 18:18:41,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 18:18:41,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-19 18:18:41,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:18:41,115 INFO L225 Difference]: With dead ends: 23 [2023-12-19 18:18:41,115 INFO L226 Difference]: Without dead ends: 16 [2023-12-19 18:18:41,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-12-19 18:18:41,116 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:18:41,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:18:41,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-12-19 18:18:41,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-12-19 18:18:41,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:41,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2023-12-19 18:18:41,124 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 13 [2023-12-19 18:18:41,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:18:41,124 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2023-12-19 18:18:41,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:41,124 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2023-12-19 18:18:41,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-19 18:18:41,125 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:18:41,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:18:41,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-19 18:18:41,330 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,SelfDestructingSolverStorable6 [2023-12-19 18:18:41,331 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:18:41,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:18:41,331 INFO L85 PathProgramCache]: Analyzing trace with hash -2140868714, now seen corresponding path program 1 times [2023-12-19 18:18:41,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:18:41,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918248307] [2023-12-19 18:18:41,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:41,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:18:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-19 18:18:41,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:18:41,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918248307] [2023-12-19 18:18:41,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918248307] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:18:41,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718384679] [2023-12-19 18:18:41,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:41,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:41,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:18:41,413 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) [2023-12-19 18:18:41,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 18:18:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:41,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 18:18:41,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:18:41,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-19 18:18:41,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:18:41,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-19 18:18:41,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718384679] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:18:41,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:18:41,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-12-19 18:18:41,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254227014] [2023-12-19 18:18:41,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:18:41,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 18:18:41,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:18:41,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 18:18:41,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 18:18:41,544 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:41,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:18:41,577 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2023-12-19 18:18:41,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 18:18:41,578 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-19 18:18:41,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:18:41,578 INFO L225 Difference]: With dead ends: 26 [2023-12-19 18:18:41,578 INFO L226 Difference]: Without dead ends: 20 [2023-12-19 18:18:41,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 18:18:41,580 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:18:41,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 22 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:18:41,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-19 18:18:41,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-19 18:18:41,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:41,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2023-12-19 18:18:41,588 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 14 [2023-12-19 18:18:41,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:18:41,588 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2023-12-19 18:18:41,588 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:41,588 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2023-12-19 18:18:41,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-19 18:18:41,589 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:18:41,589 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:18:41,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-19 18:18:41,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:41,795 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:18:41,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:18:41,795 INFO L85 PathProgramCache]: Analyzing trace with hash -2095616185, now seen corresponding path program 1 times [2023-12-19 18:18:41,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:18:41,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679160467] [2023-12-19 18:18:41,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:41,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:18:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 18:18:41,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:18:41,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679160467] [2023-12-19 18:18:41,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679160467] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:18:41,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222267547] [2023-12-19 18:18:41,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:41,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:41,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:18:41,902 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) [2023-12-19 18:18:41,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 18:18:41,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:41,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-19 18:18:41,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:18:42,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:18:42,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:18:42,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 18:18:42,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222267547] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:18:42,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:18:42,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 15 [2023-12-19 18:18:42,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183405090] [2023-12-19 18:18:42,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:18:42,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-19 18:18:42,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:18:42,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-19 18:18:42,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-12-19 18:18:42,113 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:42,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:18:42,308 INFO L93 Difference]: Finished difference Result 65 states and 91 transitions. [2023-12-19 18:18:42,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-19 18:18:42,308 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-19 18:18:42,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:18:42,310 INFO L225 Difference]: With dead ends: 65 [2023-12-19 18:18:42,310 INFO L226 Difference]: Without dead ends: 48 [2023-12-19 18:18:42,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2023-12-19 18:18:42,311 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:18:42,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 66 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:18:42,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-19 18:18:42,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2023-12-19 18:18:42,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2023-12-19 18:18:42,322 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 14 [2023-12-19 18:18:42,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:18:42,322 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2023-12-19 18:18:42,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:42,322 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2023-12-19 18:18:42,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-19 18:18:42,323 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:18:42,323 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:18:42,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 18:18:42,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:42,528 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:18:42,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:18:42,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1908629782, now seen corresponding path program 1 times [2023-12-19 18:18:42,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:18:42,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134101409] [2023-12-19 18:18:42,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:42,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:18:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 18:18:42,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:18:42,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134101409] [2023-12-19 18:18:42,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134101409] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:18:42,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937936995] [2023-12-19 18:18:42,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:42,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:42,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:18:42,598 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) [2023-12-19 18:18:42,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 18:18:42,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:42,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 18:18:42,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:18:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 18:18:42,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:18:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 18:18:42,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937936995] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:18:42,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:18:42,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-12-19 18:18:42,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155922091] [2023-12-19 18:18:42,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:18:42,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 18:18:42,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:18:42,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 18:18:42,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 18:18:42,689 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:42,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:18:42,714 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2023-12-19 18:18:42,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 18:18:42,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-19 18:18:42,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:18:42,715 INFO L225 Difference]: With dead ends: 45 [2023-12-19 18:18:42,715 INFO L226 Difference]: Without dead ends: 27 [2023-12-19 18:18:42,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 18:18:42,716 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:18:42,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 23 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:18:42,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-19 18:18:42,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-12-19 18:18:42,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:42,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2023-12-19 18:18:42,738 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 16 [2023-12-19 18:18:42,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:18:42,738 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2023-12-19 18:18:42,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:42,738 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2023-12-19 18:18:42,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-19 18:18:42,739 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:18:42,739 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:18:42,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-19 18:18:42,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-19 18:18:42,944 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:18:42,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:18:42,945 INFO L85 PathProgramCache]: Analyzing trace with hash -44680555, now seen corresponding path program 2 times [2023-12-19 18:18:42,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:18:42,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831370317] [2023-12-19 18:18:42,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:42,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:18:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 18:18:43,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:18:43,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831370317] [2023-12-19 18:18:43,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831370317] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:18:43,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566296793] [2023-12-19 18:18:43,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:18:43,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:43,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:18:43,022 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) [2023-12-19 18:18:43,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 18:18:43,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:18:43,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:18:43,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-19 18:18:43,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:18:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 18:18:43,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:18:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 18:18:43,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566296793] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:18:43,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:18:43,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 14 [2023-12-19 18:18:43,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748554607] [2023-12-19 18:18:43,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:18:43,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-19 18:18:43,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:18:43,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-19 18:18:43,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-12-19 18:18:43,177 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:43,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:18:43,408 INFO L93 Difference]: Finished difference Result 83 states and 114 transitions. [2023-12-19 18:18:43,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-19 18:18:43,409 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-19 18:18:43,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:18:43,409 INFO L225 Difference]: With dead ends: 83 [2023-12-19 18:18:43,410 INFO L226 Difference]: Without dead ends: 60 [2023-12-19 18:18:43,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-12-19 18:18:43,410 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:18:43,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 128 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:18:43,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-19 18:18:43,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 43. [2023-12-19 18:18:43,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:43,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 62 transitions. [2023-12-19 18:18:43,425 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 62 transitions. Word has length 16 [2023-12-19 18:18:43,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:18:43,425 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 62 transitions. [2023-12-19 18:18:43,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:43,426 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 62 transitions. [2023-12-19 18:18:43,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-19 18:18:43,426 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:18:43,426 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:18:43,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-19 18:18:43,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:43,632 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:18:43,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:18:43,633 INFO L85 PathProgramCache]: Analyzing trace with hash -983462638, now seen corresponding path program 2 times [2023-12-19 18:18:43,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:18:43,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479575846] [2023-12-19 18:18:43,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:43,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:18:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:43,735 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:18:43,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:18:43,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479575846] [2023-12-19 18:18:43,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479575846] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:18:43,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754612272] [2023-12-19 18:18:43,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:18:43,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:43,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:18:43,737 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) [2023-12-19 18:18:43,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-19 18:18:43,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:18:43,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:18:43,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-19 18:18:43,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:18:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-19 18:18:43,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:18:43,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-19 18:18:43,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754612272] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:18:43,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:18:43,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2023-12-19 18:18:43,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7294789] [2023-12-19 18:18:43,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:18:43,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-19 18:18:43,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:18:43,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-19 18:18:43,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-12-19 18:18:43,896 INFO L87 Difference]: Start difference. First operand 43 states and 62 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:44,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:18:44,240 INFO L93 Difference]: Finished difference Result 76 states and 111 transitions. [2023-12-19 18:18:44,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-19 18:18:44,241 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-19 18:18:44,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:18:44,242 INFO L225 Difference]: With dead ends: 76 [2023-12-19 18:18:44,242 INFO L226 Difference]: Without dead ends: 56 [2023-12-19 18:18:44,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2023-12-19 18:18:44,243 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:18:44,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 54 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:18:44,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-12-19 18:18:44,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2023-12-19 18:18:44,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:44,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 68 transitions. [2023-12-19 18:18:44,265 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 68 transitions. Word has length 17 [2023-12-19 18:18:44,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:18:44,265 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 68 transitions. [2023-12-19 18:18:44,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:44,265 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 68 transitions. [2023-12-19 18:18:44,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-19 18:18:44,266 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:18:44,266 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:18:44,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-19 18:18:44,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:44,468 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:18:44,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:18:44,469 INFO L85 PathProgramCache]: Analyzing trace with hash 179882055, now seen corresponding path program 3 times [2023-12-19 18:18:44,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:18:44,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037285913] [2023-12-19 18:18:44,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:44,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:18:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-19 18:18:44,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:18:44,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037285913] [2023-12-19 18:18:44,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037285913] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:18:44,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642164856] [2023-12-19 18:18:44,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 18:18:44,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:44,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:18:44,560 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) [2023-12-19 18:18:44,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-19 18:18:44,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-19 18:18:44,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:18:44,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-19 18:18:44,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:18:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-19 18:18:44,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:18:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:18:44,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642164856] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:18:44,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:18:44,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 19 [2023-12-19 18:18:44,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927889907] [2023-12-19 18:18:44,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:18:44,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-19 18:18:44,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:18:44,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-19 18:18:44,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-12-19 18:18:44,831 INFO L87 Difference]: Start difference. First operand 50 states and 68 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:45,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:18:45,867 INFO L93 Difference]: Finished difference Result 136 states and 188 transitions. [2023-12-19 18:18:45,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-12-19 18:18:45,868 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-19 18:18:45,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:18:45,869 INFO L225 Difference]: With dead ends: 136 [2023-12-19 18:18:45,869 INFO L226 Difference]: Without dead ends: 97 [2023-12-19 18:18:45,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=443, Invalid=2107, Unknown=0, NotChecked=0, Total=2550 [2023-12-19 18:18:45,870 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 82 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 18:18:45,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 167 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 18:18:45,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-12-19 18:18:45,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 67. [2023-12-19 18:18:45,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4242424242424243) internal successors, (94), 66 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:45,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 94 transitions. [2023-12-19 18:18:45,892 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 94 transitions. Word has length 18 [2023-12-19 18:18:45,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:18:45,892 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 94 transitions. [2023-12-19 18:18:45,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:45,892 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 94 transitions. [2023-12-19 18:18:45,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-19 18:18:45,893 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:18:45,893 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:18:45,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-19 18:18:46,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-19 18:18:46,099 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:18:46,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:18:46,099 INFO L85 PathProgramCache]: Analyzing trace with hash 376510755, now seen corresponding path program 4 times [2023-12-19 18:18:46,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:18:46,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626226601] [2023-12-19 18:18:46,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:46,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:18:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-19 18:18:46,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:18:46,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626226601] [2023-12-19 18:18:46,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626226601] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:18:46,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694450834] [2023-12-19 18:18:46,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 18:18:46,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:46,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:18:46,178 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:18:46,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-19 18:18:46,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 18:18:46,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:18:46,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-19 18:18:46,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:18:46,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-19 18:18:46,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:18:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-19 18:18:46,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694450834] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:18:46,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:18:46,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-12-19 18:18:46,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472420168] [2023-12-19 18:18:46,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:18:46,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 18:18:46,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:18:46,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 18:18:46,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 18:18:46,281 INFO L87 Difference]: Start difference. First operand 67 states and 94 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:46,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:18:46,343 INFO L93 Difference]: Finished difference Result 81 states and 111 transitions. [2023-12-19 18:18:46,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 18:18:46,344 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-19 18:18:46,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:18:46,344 INFO L225 Difference]: With dead ends: 81 [2023-12-19 18:18:46,345 INFO L226 Difference]: Without dead ends: 69 [2023-12-19 18:18:46,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-19 18:18:46,345 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:18:46,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 26 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:18:46,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-19 18:18:46,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-12-19 18:18:46,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.3970588235294117) internal successors, (95), 68 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:46,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 95 transitions. [2023-12-19 18:18:46,379 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 95 transitions. Word has length 19 [2023-12-19 18:18:46,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:18:46,379 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 95 transitions. [2023-12-19 18:18:46,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:46,380 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 95 transitions. [2023-12-19 18:18:46,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-19 18:18:46,382 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:18:46,382 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:18:46,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-19 18:18:46,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-19 18:18:46,589 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:18:46,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:18:46,589 INFO L85 PathProgramCache]: Analyzing trace with hash -867982685, now seen corresponding path program 3 times [2023-12-19 18:18:46,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:18:46,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860004977] [2023-12-19 18:18:46,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:46,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:18:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:46,694 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-19 18:18:46,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:18:46,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860004977] [2023-12-19 18:18:46,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860004977] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:18:46,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405052081] [2023-12-19 18:18:46,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 18:18:46,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:46,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:18:46,696 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:18:46,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-19 18:18:46,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-19 18:18:46,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:18:46,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-19 18:18:46,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:18:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 18:18:46,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:18:46,939 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 18:18:46,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405052081] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:18:46,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:18:46,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2023-12-19 18:18:46,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715583024] [2023-12-19 18:18:46,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:18:46,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-19 18:18:46,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:18:46,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-19 18:18:46,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-12-19 18:18:46,940 INFO L87 Difference]: Start difference. First operand 69 states and 95 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:47,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:18:47,807 INFO L93 Difference]: Finished difference Result 163 states and 227 transitions. [2023-12-19 18:18:47,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-19 18:18:47,808 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-19 18:18:47,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:18:47,809 INFO L225 Difference]: With dead ends: 163 [2023-12-19 18:18:47,809 INFO L226 Difference]: Without dead ends: 135 [2023-12-19 18:18:47,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=1563, Unknown=0, NotChecked=0, Total=1806 [2023-12-19 18:18:47,810 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 134 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 18:18:47,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 166 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 18:18:47,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-12-19 18:18:47,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2023-12-19 18:18:47,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.3516483516483517) internal successors, (123), 91 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:47,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 123 transitions. [2023-12-19 18:18:47,836 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 123 transitions. Word has length 19 [2023-12-19 18:18:47,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:18:47,836 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 123 transitions. [2023-12-19 18:18:47,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:47,836 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 123 transitions. [2023-12-19 18:18:47,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-19 18:18:47,836 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:18:47,837 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:18:47,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-19 18:18:48,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-19 18:18:48,042 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:18:48,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:18:48,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1184261561, now seen corresponding path program 2 times [2023-12-19 18:18:48,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:18:48,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313382061] [2023-12-19 18:18:48,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:48,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:18:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:48,164 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 18:18:48,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:18:48,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313382061] [2023-12-19 18:18:48,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313382061] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:18:48,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211356131] [2023-12-19 18:18:48,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:18:48,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:48,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:18:48,168 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:18:48,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-19 18:18:48,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:18:48,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:18:48,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-19 18:18:48,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:18:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-19 18:18:48,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:18:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-19 18:18:48,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211356131] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:18:48,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:18:48,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2023-12-19 18:18:48,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635286208] [2023-12-19 18:18:48,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:18:48,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-19 18:18:48,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:18:48,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-19 18:18:48,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2023-12-19 18:18:48,367 INFO L87 Difference]: Start difference. First operand 92 states and 123 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:49,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:18:49,294 INFO L93 Difference]: Finished difference Result 132 states and 180 transitions. [2023-12-19 18:18:49,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-19 18:18:49,294 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-19 18:18:49,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:18:49,295 INFO L225 Difference]: With dead ends: 132 [2023-12-19 18:18:49,295 INFO L226 Difference]: Without dead ends: 106 [2023-12-19 18:18:49,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=372, Invalid=2708, Unknown=0, NotChecked=0, Total=3080 [2023-12-19 18:18:49,297 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 102 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 18:18:49,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 29 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 18:18:49,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-12-19 18:18:49,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 81. [2023-12-19 18:18:49,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.3125) internal successors, (105), 80 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:49,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 105 transitions. [2023-12-19 18:18:49,322 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 105 transitions. Word has length 20 [2023-12-19 18:18:49,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:18:49,323 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 105 transitions. [2023-12-19 18:18:49,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:49,323 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 105 transitions. [2023-12-19 18:18:49,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-19 18:18:49,323 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:18:49,323 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:18:49,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-19 18:18:49,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-19 18:18:49,529 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:18:49,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:18:49,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1139243939, now seen corresponding path program 5 times [2023-12-19 18:18:49,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:18:49,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843797203] [2023-12-19 18:18:49,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:49,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:18:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:49,617 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-19 18:18:49,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:18:49,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843797203] [2023-12-19 18:18:49,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843797203] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:18:49,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925860084] [2023-12-19 18:18:49,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 18:18:49,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:49,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:18:49,619 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:18:49,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-19 18:18:49,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-19 18:18:49,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:18:49,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-19 18:18:49,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:18:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-19 18:18:49,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:18:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-19 18:18:49,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925860084] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:18:49,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:18:49,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-12-19 18:18:49,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77996691] [2023-12-19 18:18:49,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:18:49,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 18:18:49,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:18:49,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 18:18:49,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 18:18:49,734 INFO L87 Difference]: Start difference. First operand 81 states and 105 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:49,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:18:49,782 INFO L93 Difference]: Finished difference Result 103 states and 134 transitions. [2023-12-19 18:18:49,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 18:18:49,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-12-19 18:18:49,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:18:49,784 INFO L225 Difference]: With dead ends: 103 [2023-12-19 18:18:49,784 INFO L226 Difference]: Without dead ends: 79 [2023-12-19 18:18:49,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 18:18:49,786 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:18:49,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 32 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:18:49,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-19 18:18:49,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-12-19 18:18:49,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.3205128205128205) internal successors, (103), 78 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:49,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2023-12-19 18:18:49,810 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 21 [2023-12-19 18:18:49,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:18:49,811 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2023-12-19 18:18:49,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:49,811 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2023-12-19 18:18:49,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-19 18:18:49,812 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:18:49,813 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:18:49,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-19 18:18:50,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-19 18:18:50,018 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:18:50,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:18:50,019 INFO L85 PathProgramCache]: Analyzing trace with hash -134959996, now seen corresponding path program 6 times [2023-12-19 18:18:50,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:18:50,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597030929] [2023-12-19 18:18:50,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:50,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:18:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:50,124 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-19 18:18:50,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:18:50,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597030929] [2023-12-19 18:18:50,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597030929] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:18:50,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685534911] [2023-12-19 18:18:50,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 18:18:50,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:50,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:18:50,126 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:18:50,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-19 18:18:50,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-12-19 18:18:50,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:18:50,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 18:18:50,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:18:50,217 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-19 18:18:50,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:18:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-19 18:18:50,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685534911] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:18:50,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:18:50,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 17 [2023-12-19 18:18:50,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315199393] [2023-12-19 18:18:50,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:18:50,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-19 18:18:50,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:18:50,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-19 18:18:50,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-12-19 18:18:50,298 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:50,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:18:50,736 INFO L93 Difference]: Finished difference Result 205 states and 269 transitions. [2023-12-19 18:18:50,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-19 18:18:50,737 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-12-19 18:18:50,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:18:50,738 INFO L225 Difference]: With dead ends: 205 [2023-12-19 18:18:50,738 INFO L226 Difference]: Without dead ends: 172 [2023-12-19 18:18:50,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2023-12-19 18:18:50,739 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 138 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 18:18:50,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 305 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 18:18:50,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-12-19 18:18:50,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 82. [2023-12-19 18:18:50,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.271604938271605) internal successors, (103), 81 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:50,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 103 transitions. [2023-12-19 18:18:50,765 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 103 transitions. Word has length 21 [2023-12-19 18:18:50,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:18:50,765 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 103 transitions. [2023-12-19 18:18:50,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:50,766 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 103 transitions. [2023-12-19 18:18:50,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-19 18:18:50,766 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:18:50,766 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:18:50,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-19 18:18:50,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-19 18:18:50,971 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:18:50,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:18:50,971 INFO L85 PathProgramCache]: Analyzing trace with hash -684296169, now seen corresponding path program 3 times [2023-12-19 18:18:50,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:18:50,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13798409] [2023-12-19 18:18:50,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:50,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:18:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:51,096 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:18:51,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:18:51,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13798409] [2023-12-19 18:18:51,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13798409] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:18:51,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778147255] [2023-12-19 18:18:51,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 18:18:51,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:51,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:18:51,098 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:18:51,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-19 18:18:51,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-19 18:18:51,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:18:51,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-19 18:18:51,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:18:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-19 18:18:51,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:18:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-19 18:18:51,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778147255] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:18:51,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:18:51,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 26 [2023-12-19 18:18:51,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990377210] [2023-12-19 18:18:51,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:18:51,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-19 18:18:51,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:18:51,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-19 18:18:51,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2023-12-19 18:18:51,437 INFO L87 Difference]: Start difference. First operand 82 states and 103 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:53,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:18:53,355 INFO L93 Difference]: Finished difference Result 226 states and 302 transitions. [2023-12-19 18:18:53,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-12-19 18:18:53,355 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-19 18:18:53,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:18:53,356 INFO L225 Difference]: With dead ends: 226 [2023-12-19 18:18:53,356 INFO L226 Difference]: Without dead ends: 185 [2023-12-19 18:18:53,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=767, Invalid=5395, Unknown=0, NotChecked=0, Total=6162 [2023-12-19 18:18:53,358 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 129 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-19 18:18:53,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 480 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 1511 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-19 18:18:53,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-12-19 18:18:53,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 106. [2023-12-19 18:18:53,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.380952380952381) internal successors, (145), 105 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:53,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 145 transitions. [2023-12-19 18:18:53,398 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 145 transitions. Word has length 22 [2023-12-19 18:18:53,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:18:53,398 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 145 transitions. [2023-12-19 18:18:53,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:53,398 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 145 transitions. [2023-12-19 18:18:53,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-19 18:18:53,398 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:18:53,399 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:18:53,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-19 18:18:53,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:53,604 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:18:53,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:18:53,604 INFO L85 PathProgramCache]: Analyzing trace with hash 732123794, now seen corresponding path program 4 times [2023-12-19 18:18:53,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:18:53,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431719284] [2023-12-19 18:18:53,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:53,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:18:53,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:18:53,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:18:53,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431719284] [2023-12-19 18:18:53,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431719284] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:18:53,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392982257] [2023-12-19 18:18:53,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 18:18:53,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:53,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:18:53,754 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:18:53,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-19 18:18:53,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 18:18:53,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:18:53,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-19 18:18:53,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:18:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-19 18:18:53,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:18:54,006 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-19 18:18:54,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392982257] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:18:54,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:18:54,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2023-12-19 18:18:54,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217329793] [2023-12-19 18:18:54,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:18:54,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-19 18:18:54,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:18:54,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-19 18:18:54,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2023-12-19 18:18:54,008 INFO L87 Difference]: Start difference. First operand 106 states and 145 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:55,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:18:55,706 INFO L93 Difference]: Finished difference Result 211 states and 309 transitions. [2023-12-19 18:18:55,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-12-19 18:18:55,707 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-19 18:18:55,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:18:55,708 INFO L225 Difference]: With dead ends: 211 [2023-12-19 18:18:55,708 INFO L226 Difference]: Without dead ends: 180 [2023-12-19 18:18:55,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 36 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=572, Invalid=4398, Unknown=0, NotChecked=0, Total=4970 [2023-12-19 18:18:55,709 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 176 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 18:18:55,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 73 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 18:18:55,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-12-19 18:18:55,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 135. [2023-12-19 18:18:55,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.3582089552238805) internal successors, (182), 134 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:55,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 182 transitions. [2023-12-19 18:18:55,746 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 182 transitions. Word has length 23 [2023-12-19 18:18:55,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:18:55,746 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 182 transitions. [2023-12-19 18:18:55,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:55,746 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 182 transitions. [2023-12-19 18:18:55,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-19 18:18:55,746 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:18:55,746 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:18:55,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-19 18:18:55,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:55,947 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:18:55,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:18:55,947 INFO L85 PathProgramCache]: Analyzing trace with hash 752963510, now seen corresponding path program 7 times [2023-12-19 18:18:55,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:18:55,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714410545] [2023-12-19 18:18:55,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:55,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:18:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-19 18:18:56,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:18:56,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714410545] [2023-12-19 18:18:56,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714410545] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:18:56,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698018197] [2023-12-19 18:18:56,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 18:18:56,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:56,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:18:56,048 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:18:56,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-19 18:18:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:56,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-19 18:18:56,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:18:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-19 18:18:56,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:18:56,166 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-19 18:18:56,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698018197] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:18:56,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:18:56,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2023-12-19 18:18:56,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203356496] [2023-12-19 18:18:56,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:18:56,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 18:18:56,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:18:56,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 18:18:56,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-19 18:18:56,167 INFO L87 Difference]: Start difference. First operand 135 states and 182 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:56,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:18:56,282 INFO L93 Difference]: Finished difference Result 150 states and 201 transitions. [2023-12-19 18:18:56,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 18:18:56,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-19 18:18:56,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:18:56,283 INFO L225 Difference]: With dead ends: 150 [2023-12-19 18:18:56,283 INFO L226 Difference]: Without dead ends: 137 [2023-12-19 18:18:56,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-12-19 18:18:56,284 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:18:56,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 40 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:18:56,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-12-19 18:18:56,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2023-12-19 18:18:56,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.3455882352941178) internal successors, (183), 136 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:56,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 183 transitions. [2023-12-19 18:18:56,343 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 183 transitions. Word has length 24 [2023-12-19 18:18:56,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:18:56,343 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 183 transitions. [2023-12-19 18:18:56,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:56,343 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 183 transitions. [2023-12-19 18:18:56,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-19 18:18:56,344 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:18:56,344 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:18:56,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-19 18:18:56,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:56,550 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:18:56,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:18:56,550 INFO L85 PathProgramCache]: Analyzing trace with hash 677068581, now seen corresponding path program 4 times [2023-12-19 18:18:56,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:18:56,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32787890] [2023-12-19 18:18:56,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:56,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:18:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-19 18:18:56,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:18:56,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32787890] [2023-12-19 18:18:56,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32787890] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:18:56,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705735122] [2023-12-19 18:18:56,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 18:18:56,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:56,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:18:56,678 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:18:56,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-19 18:18:56,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 18:18:56,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:18:56,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-19 18:18:56,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:18:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-19 18:18:56,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:18:56,866 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-19 18:18:56,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705735122] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:18:56,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:18:56,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 8] total 22 [2023-12-19 18:18:56,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247977576] [2023-12-19 18:18:56,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:18:56,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-19 18:18:56,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:18:56,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-19 18:18:56,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2023-12-19 18:18:56,867 INFO L87 Difference]: Start difference. First operand 137 states and 183 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:57,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:18:57,821 INFO L93 Difference]: Finished difference Result 309 states and 408 transitions. [2023-12-19 18:18:57,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-19 18:18:57,822 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-19 18:18:57,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:18:57,823 INFO L225 Difference]: With dead ends: 309 [2023-12-19 18:18:57,823 INFO L226 Difference]: Without dead ends: 243 [2023-12-19 18:18:57,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=318, Invalid=2438, Unknown=0, NotChecked=0, Total=2756 [2023-12-19 18:18:57,824 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 117 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 18:18:57,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 501 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 18:18:57,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-12-19 18:18:57,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 146. [2023-12-19 18:18:57,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.3172413793103448) internal successors, (191), 145 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:57,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 191 transitions. [2023-12-19 18:18:57,873 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 191 transitions. Word has length 24 [2023-12-19 18:18:57,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:18:57,873 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 191 transitions. [2023-12-19 18:18:57,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:18:57,873 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 191 transitions. [2023-12-19 18:18:57,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-19 18:18:57,874 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:18:57,874 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:18:57,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-19 18:18:58,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:58,075 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:18:58,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:18:58,075 INFO L85 PathProgramCache]: Analyzing trace with hash 118165685, now seen corresponding path program 5 times [2023-12-19 18:18:58,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:18:58,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28741728] [2023-12-19 18:18:58,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:18:58,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:18:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:18:58,206 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-19 18:18:58,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:18:58,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28741728] [2023-12-19 18:18:58,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28741728] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:18:58,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723422535] [2023-12-19 18:18:58,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 18:18:58,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:18:58,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:18:58,207 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:18:58,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-19 18:18:58,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-19 18:18:58,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:18:58,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-19 18:18:58,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:18:58,418 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-19 18:18:58,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:18:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-19 18:18:58,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723422535] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:18:58,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:18:58,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14] total 30 [2023-12-19 18:18:58,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957349055] [2023-12-19 18:18:58,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:18:58,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-19 18:18:58,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:18:58,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-19 18:18:58,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2023-12-19 18:18:58,647 INFO L87 Difference]: Start difference. First operand 146 states and 191 transitions. Second operand has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:00,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:19:00,099 INFO L93 Difference]: Finished difference Result 288 states and 377 transitions. [2023-12-19 18:19:00,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-12-19 18:19:00,100 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-19 18:19:00,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:19:00,101 INFO L225 Difference]: With dead ends: 288 [2023-12-19 18:19:00,101 INFO L226 Difference]: Without dead ends: 243 [2023-12-19 18:19:00,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=400, Invalid=3022, Unknown=0, NotChecked=0, Total=3422 [2023-12-19 18:19:00,102 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 155 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 18:19:00,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 448 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 18:19:00,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-12-19 18:19:00,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 150. [2023-12-19 18:19:00,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.3221476510067114) internal successors, (197), 149 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:00,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 197 transitions. [2023-12-19 18:19:00,186 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 197 transitions. Word has length 25 [2023-12-19 18:19:00,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:19:00,186 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 197 transitions. [2023-12-19 18:19:00,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:00,186 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 197 transitions. [2023-12-19 18:19:00,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-19 18:19:00,187 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:19:00,187 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:19:00,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-19 18:19:00,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:19:00,392 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:19:00,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:19:00,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1070841546, now seen corresponding path program 8 times [2023-12-19 18:19:00,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:19:00,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600998275] [2023-12-19 18:19:00,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:19:00,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:19:00,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:19:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-19 18:19:00,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:19:00,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600998275] [2023-12-19 18:19:00,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600998275] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:19:00,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536491078] [2023-12-19 18:19:00,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:19:00,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:19:00,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:19:00,520 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:19:00,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-19 18:19:00,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:19:00,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:19:00,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-19 18:19:00,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:19:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-19 18:19:00,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:19:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-19 18:19:00,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536491078] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:19:00,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:19:00,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2023-12-19 18:19:00,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300345] [2023-12-19 18:19:00,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:19:00,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 18:19:00,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:19:00,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 18:19:00,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-19 18:19:00,653 INFO L87 Difference]: Start difference. First operand 150 states and 197 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:00,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:19:00,747 INFO L93 Difference]: Finished difference Result 171 states and 228 transitions. [2023-12-19 18:19:00,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 18:19:00,748 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-19 18:19:00,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:19:00,749 INFO L225 Difference]: With dead ends: 171 [2023-12-19 18:19:00,749 INFO L226 Difference]: Without dead ends: 138 [2023-12-19 18:19:00,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 9 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-19 18:19:00,750 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:19:00,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 42 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:19:00,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-12-19 18:19:00,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2023-12-19 18:19:00,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.3357664233576643) internal successors, (183), 137 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:00,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 183 transitions. [2023-12-19 18:19:00,812 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 183 transitions. Word has length 26 [2023-12-19 18:19:00,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:19:00,812 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 183 transitions. [2023-12-19 18:19:00,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:00,812 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 183 transitions. [2023-12-19 18:19:00,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-19 18:19:00,812 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:19:00,812 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:19:00,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-19 18:19:01,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:19:01,013 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:19:01,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:19:01,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1584003690, now seen corresponding path program 5 times [2023-12-19 18:19:01,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:19:01,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000974644] [2023-12-19 18:19:01,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:19:01,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:19:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:19:01,218 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:19:01,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:19:01,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000974644] [2023-12-19 18:19:01,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000974644] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:19:01,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315521862] [2023-12-19 18:19:01,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 18:19:01,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:19:01,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:19:01,219 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:19:01,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-19 18:19:01,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-19 18:19:01,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:19:01,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-19 18:19:01,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:19:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:19:01,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:19:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-19 18:19:01,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315521862] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:19:01,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:19:01,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 13] total 33 [2023-12-19 18:19:01,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468328318] [2023-12-19 18:19:01,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:19:01,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-19 18:19:01,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:19:01,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-19 18:19:01,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2023-12-19 18:19:01,742 INFO L87 Difference]: Start difference. First operand 138 states and 183 transitions. Second operand has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:03,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:19:03,240 INFO L93 Difference]: Finished difference Result 327 states and 489 transitions. [2023-12-19 18:19:03,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-12-19 18:19:03,241 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-19 18:19:03,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:19:03,241 INFO L225 Difference]: With dead ends: 327 [2023-12-19 18:19:03,241 INFO L226 Difference]: Without dead ends: 290 [2023-12-19 18:19:03,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1508, Invalid=4812, Unknown=0, NotChecked=0, Total=6320 [2023-12-19 18:19:03,243 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 234 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-19 18:19:03,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 216 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-19 18:19:03,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-12-19 18:19:03,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 168. [2023-12-19 18:19:03,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.3892215568862276) internal successors, (232), 167 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:03,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 232 transitions. [2023-12-19 18:19:03,320 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 232 transitions. Word has length 26 [2023-12-19 18:19:03,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:19:03,320 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 232 transitions. [2023-12-19 18:19:03,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:03,320 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 232 transitions. [2023-12-19 18:19:03,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-19 18:19:03,321 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:19:03,321 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:19:03,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-19 18:19:03,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-19 18:19:03,527 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:19:03,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:19:03,527 INFO L85 PathProgramCache]: Analyzing trace with hash 2124387075, now seen corresponding path program 9 times [2023-12-19 18:19:03,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:19:03,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999201563] [2023-12-19 18:19:03,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:19:03,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:19:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:19:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-19 18:19:03,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:19:03,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999201563] [2023-12-19 18:19:03,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999201563] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:19:03,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001383260] [2023-12-19 18:19:03,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 18:19:03,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:19:03,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:19:03,708 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:19:03,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-19 18:19:03,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-19 18:19:03,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:19:03,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-19 18:19:03,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:19:03,830 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-19 18:19:03,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:19:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-19 18:19:03,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001383260] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:19:03,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:19:03,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2023-12-19 18:19:03,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119926911] [2023-12-19 18:19:03,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:19:03,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-19 18:19:03,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:19:03,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-19 18:19:03,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-12-19 18:19:03,873 INFO L87 Difference]: Start difference. First operand 168 states and 232 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:04,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:19:04,056 INFO L93 Difference]: Finished difference Result 212 states and 295 transitions. [2023-12-19 18:19:04,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-19 18:19:04,056 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-19 18:19:04,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:19:04,057 INFO L225 Difference]: With dead ends: 212 [2023-12-19 18:19:04,057 INFO L226 Difference]: Without dead ends: 195 [2023-12-19 18:19:04,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2023-12-19 18:19:04,058 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:19:04,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 55 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:19:04,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-12-19 18:19:04,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2023-12-19 18:19:04,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.3711340206185567) internal successors, (266), 194 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:04,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 266 transitions. [2023-12-19 18:19:04,149 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 266 transitions. Word has length 27 [2023-12-19 18:19:04,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:19:04,150 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 266 transitions. [2023-12-19 18:19:04,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:04,150 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 266 transitions. [2023-12-19 18:19:04,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-19 18:19:04,150 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:19:04,150 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:19:04,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-19 18:19:04,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-19 18:19:04,356 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:19:04,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:19:04,356 INFO L85 PathProgramCache]: Analyzing trace with hash -543309725, now seen corresponding path program 6 times [2023-12-19 18:19:04,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:19:04,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329792076] [2023-12-19 18:19:04,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:19:04,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:19:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:19:04,568 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:19:04,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:19:04,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329792076] [2023-12-19 18:19:04,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329792076] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:19:04,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561281021] [2023-12-19 18:19:04,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 18:19:04,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:19:04,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:19:04,570 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:19:04,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-19 18:19:04,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-19 18:19:04,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:19:04,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-19 18:19:04,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:19:04,787 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-19 18:19:04,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:19:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-19 18:19:04,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561281021] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:19:04,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:19:04,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 23 [2023-12-19 18:19:04,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566582528] [2023-12-19 18:19:04,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:19:04,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-19 18:19:04,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:19:04,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-19 18:19:04,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2023-12-19 18:19:04,994 INFO L87 Difference]: Start difference. First operand 195 states and 266 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:08,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:19:08,667 INFO L93 Difference]: Finished difference Result 400 states and 543 transitions. [2023-12-19 18:19:08,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-12-19 18:19:08,667 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-19 18:19:08,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:19:08,668 INFO L225 Difference]: With dead ends: 400 [2023-12-19 18:19:08,668 INFO L226 Difference]: Without dead ends: 315 [2023-12-19 18:19:08,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 47 SyntacticMatches, 10 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1914 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=697, Invalid=6443, Unknown=0, NotChecked=0, Total=7140 [2023-12-19 18:19:08,671 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 223 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-19 18:19:08,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 476 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1415 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-19 18:19:08,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2023-12-19 18:19:08,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 205. [2023-12-19 18:19:08,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.338235294117647) internal successors, (273), 204 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:08,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 273 transitions. [2023-12-19 18:19:08,757 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 273 transitions. Word has length 27 [2023-12-19 18:19:08,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:19:08,757 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 273 transitions. [2023-12-19 18:19:08,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:08,757 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 273 transitions. [2023-12-19 18:19:08,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-19 18:19:08,758 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:19:08,758 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:19:08,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-19 18:19:08,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-19 18:19:08,961 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:19:08,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:19:08,961 INFO L85 PathProgramCache]: Analyzing trace with hash 508799203, now seen corresponding path program 6 times [2023-12-19 18:19:08,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:19:08,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661393216] [2023-12-19 18:19:08,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:19:08,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:19:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:19:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-19 18:19:09,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:19:09,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661393216] [2023-12-19 18:19:09,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661393216] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:19:09,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189959723] [2023-12-19 18:19:09,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 18:19:09,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:19:09,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:19:09,140 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:19:09,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-19 18:19:09,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-19 18:19:09,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:19:09,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-19 18:19:09,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:19:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-19 18:19:09,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:19:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-19 18:19:09,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189959723] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:19:09,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:19:09,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 21 [2023-12-19 18:19:09,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947162990] [2023-12-19 18:19:09,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:19:09,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-19 18:19:09,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:19:09,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-19 18:19:09,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2023-12-19 18:19:09,521 INFO L87 Difference]: Start difference. First operand 205 states and 273 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:11,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:19:11,514 INFO L93 Difference]: Finished difference Result 287 states and 372 transitions. [2023-12-19 18:19:11,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-12-19 18:19:11,514 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-19 18:19:11,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:19:11,515 INFO L225 Difference]: With dead ends: 287 [2023-12-19 18:19:11,515 INFO L226 Difference]: Without dead ends: 251 [2023-12-19 18:19:11,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 49 SyntacticMatches, 10 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=516, Invalid=4596, Unknown=0, NotChecked=0, Total=5112 [2023-12-19 18:19:11,517 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 133 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-19 18:19:11,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 321 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-19 18:19:11,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-12-19 18:19:11,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 199. [2023-12-19 18:19:11,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.3383838383838385) internal successors, (265), 198 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:11,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 265 transitions. [2023-12-19 18:19:11,599 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 265 transitions. Word has length 29 [2023-12-19 18:19:11,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:19:11,599 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 265 transitions. [2023-12-19 18:19:11,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:11,599 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 265 transitions. [2023-12-19 18:19:11,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-19 18:19:11,600 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:19:11,600 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:19:11,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-19 18:19:11,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:19:11,800 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:19:11,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:19:11,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1998985234, now seen corresponding path program 7 times [2023-12-19 18:19:11,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:19:11,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20271733] [2023-12-19 18:19:11,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:19:11,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:19:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:19:12,034 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:19:12,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:19:12,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20271733] [2023-12-19 18:19:12,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20271733] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:19:12,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143286759] [2023-12-19 18:19:12,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 18:19:12,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:19:12,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:19:12,036 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:19:12,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-19 18:19:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:19:12,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-19 18:19:12,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:19:12,250 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-19 18:19:12,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:19:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-19 18:19:12,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143286759] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:19:12,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:19:12,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 24 [2023-12-19 18:19:12,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867496915] [2023-12-19 18:19:12,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:19:12,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-19 18:19:12,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:19:12,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-19 18:19:12,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2023-12-19 18:19:12,470 INFO L87 Difference]: Start difference. First operand 199 states and 265 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:23,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:19:23,128 INFO L93 Difference]: Finished difference Result 328 states and 457 transitions. [2023-12-19 18:19:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-12-19 18:19:23,128 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-19 18:19:23,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:19:23,129 INFO L225 Difference]: With dead ends: 328 [2023-12-19 18:19:23,129 INFO L226 Difference]: Without dead ends: 292 [2023-12-19 18:19:23,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 44 SyntacticMatches, 12 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5392 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1445, Invalid=15067, Unknown=0, NotChecked=0, Total=16512 [2023-12-19 18:19:23,131 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 239 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1866 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-19 18:19:23,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 128 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1866 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-19 18:19:23,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2023-12-19 18:19:23,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 221. [2023-12-19 18:19:23,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.3227272727272728) internal successors, (291), 220 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:23,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 291 transitions. [2023-12-19 18:19:23,231 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 291 transitions. Word has length 29 [2023-12-19 18:19:23,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:19:23,231 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 291 transitions. [2023-12-19 18:19:23,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:23,231 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 291 transitions. [2023-12-19 18:19:23,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-19 18:19:23,232 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:19:23,232 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:19:23,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-19 18:19:23,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-19 18:19:23,437 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:19:23,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:19:23,438 INFO L85 PathProgramCache]: Analyzing trace with hash 529063012, now seen corresponding path program 10 times [2023-12-19 18:19:23,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:19:23,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79810440] [2023-12-19 18:19:23,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:19:23,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:19:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:19:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-19 18:19:23,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:19:23,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79810440] [2023-12-19 18:19:23,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79810440] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:19:23,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804524356] [2023-12-19 18:19:23,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 18:19:23,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:19:23,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:19:23,637 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:19:23,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-19 18:19:23,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 18:19:23,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:19:23,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-19 18:19:23,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:19:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-19 18:19:23,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:19:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-19 18:19:23,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804524356] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:19:23,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:19:23,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 8] total 25 [2023-12-19 18:19:23,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50687419] [2023-12-19 18:19:23,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:19:23,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-19 18:19:23,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:19:23,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-19 18:19:23,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2023-12-19 18:19:23,872 INFO L87 Difference]: Start difference. First operand 221 states and 291 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:24,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:19:24,725 INFO L93 Difference]: Finished difference Result 589 states and 774 transitions. [2023-12-19 18:19:24,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-19 18:19:24,726 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-19 18:19:24,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:19:24,727 INFO L225 Difference]: With dead ends: 589 [2023-12-19 18:19:24,727 INFO L226 Difference]: Without dead ends: 509 [2023-12-19 18:19:24,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2023-12-19 18:19:24,728 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 191 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 18:19:24,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 596 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 18:19:24,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2023-12-19 18:19:24,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 243. [2023-12-19 18:19:24,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.2933884297520661) internal successors, (313), 242 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:24,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 313 transitions. [2023-12-19 18:19:24,850 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 313 transitions. Word has length 29 [2023-12-19 18:19:24,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:19:24,850 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 313 transitions. [2023-12-19 18:19:24,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:24,850 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 313 transitions. [2023-12-19 18:19:24,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-19 18:19:24,851 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:19:24,851 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:19:24,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-19 18:19:25,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:19:25,055 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:19:25,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:19:25,056 INFO L85 PathProgramCache]: Analyzing trace with hash 982104067, now seen corresponding path program 11 times [2023-12-19 18:19:25,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:19:25,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042995688] [2023-12-19 18:19:25,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:19:25,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:19:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:19:25,184 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-19 18:19:25,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:19:25,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042995688] [2023-12-19 18:19:25,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042995688] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:19:25,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683328626] [2023-12-19 18:19:25,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 18:19:25,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:19:25,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:19:25,186 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:19:25,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-19 18:19:25,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-19 18:19:25,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:19:25,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-19 18:19:25,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:19:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-19 18:19:25,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:19:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-19 18:19:25,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683328626] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:19:25,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:19:25,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 14 [2023-12-19 18:19:25,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129801667] [2023-12-19 18:19:25,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:19:25,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-19 18:19:25,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:19:25,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-19 18:19:25,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-12-19 18:19:25,432 INFO L87 Difference]: Start difference. First operand 243 states and 313 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:26,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:19:26,131 INFO L93 Difference]: Finished difference Result 418 states and 592 transitions. [2023-12-19 18:19:26,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-19 18:19:26,131 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-12-19 18:19:26,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:19:26,132 INFO L225 Difference]: With dead ends: 418 [2023-12-19 18:19:26,132 INFO L226 Difference]: Without dead ends: 374 [2023-12-19 18:19:26,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2023-12-19 18:19:26,133 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 94 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:19:26,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 92 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:19:26,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-12-19 18:19:26,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 359. [2023-12-19 18:19:26,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.3798882681564246) internal successors, (494), 358 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:26,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 494 transitions. [2023-12-19 18:19:26,322 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 494 transitions. Word has length 31 [2023-12-19 18:19:26,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:19:26,322 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 494 transitions. [2023-12-19 18:19:26,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:26,322 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 494 transitions. [2023-12-19 18:19:26,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-19 18:19:26,323 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:19:26,323 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:19:26,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-12-19 18:19:26,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-12-19 18:19:26,529 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:19:26,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:19:26,529 INFO L85 PathProgramCache]: Analyzing trace with hash 38476852, now seen corresponding path program 12 times [2023-12-19 18:19:26,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:19:26,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461738312] [2023-12-19 18:19:26,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:19:26,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:19:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:19:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-19 18:19:26,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:19:26,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461738312] [2023-12-19 18:19:26,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461738312] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:19:26,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063281290] [2023-12-19 18:19:26,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 18:19:26,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:19:26,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:19:26,756 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:19:26,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-19 18:19:26,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-19 18:19:26,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:19:26,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-19 18:19:26,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:19:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-19 18:19:27,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:19:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-19 18:19:27,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063281290] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:19:27,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:19:27,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 15] total 38 [2023-12-19 18:19:27,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005798493] [2023-12-19 18:19:27,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:19:27,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-19 18:19:27,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:19:27,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-19 18:19:27,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2023-12-19 18:19:27,452 INFO L87 Difference]: Start difference. First operand 359 states and 494 transitions. Second operand has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 38 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:33,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:19:33,813 INFO L93 Difference]: Finished difference Result 843 states and 1188 transitions. [2023-12-19 18:19:33,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2023-12-19 18:19:33,813 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 38 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-12-19 18:19:33,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:19:33,815 INFO L225 Difference]: With dead ends: 843 [2023-12-19 18:19:33,815 INFO L226 Difference]: Without dead ends: 665 [2023-12-19 18:19:33,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6620 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2440, Invalid=20512, Unknown=0, NotChecked=0, Total=22952 [2023-12-19 18:19:33,817 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 205 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 2850 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 3335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 2850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-19 18:19:33,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 948 Invalid, 3335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 2850 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-19 18:19:33,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2023-12-19 18:19:34,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 421. [2023-12-19 18:19:34,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.4476190476190476) internal successors, (608), 420 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:34,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 608 transitions. [2023-12-19 18:19:34,017 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 608 transitions. Word has length 31 [2023-12-19 18:19:34,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:19:34,018 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 608 transitions. [2023-12-19 18:19:34,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 38 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:34,018 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 608 transitions. [2023-12-19 18:19:34,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-19 18:19:34,019 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:19:34,019 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:19:34,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-19 18:19:34,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:19:34,224 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:19:34,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:19:34,224 INFO L85 PathProgramCache]: Analyzing trace with hash 2049814678, now seen corresponding path program 8 times [2023-12-19 18:19:34,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:19:34,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844975904] [2023-12-19 18:19:34,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:19:34,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:19:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:19:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:19:34,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:19:34,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844975904] [2023-12-19 18:19:34,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844975904] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:19:34,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934081935] [2023-12-19 18:19:34,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:19:34,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:19:34,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:19:34,479 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:19:34,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-19 18:19:34,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:19:34,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:19:34,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-19 18:19:34,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:19:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-19 18:19:34,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:19:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-19 18:19:34,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934081935] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:19:34,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:19:34,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 27 [2023-12-19 18:19:34,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868167840] [2023-12-19 18:19:34,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:19:34,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-19 18:19:34,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:19:34,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-19 18:19:34,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2023-12-19 18:19:34,973 INFO L87 Difference]: Start difference. First operand 421 states and 608 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:52,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:19:52,774 INFO L93 Difference]: Finished difference Result 623 states and 906 transitions. [2023-12-19 18:19:52,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2023-12-19 18:19:52,774 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-12-19 18:19:52,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:19:52,776 INFO L225 Difference]: With dead ends: 623 [2023-12-19 18:19:52,776 INFO L226 Difference]: Without dead ends: 534 [2023-12-19 18:19:52,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 48 SyntacticMatches, 14 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5960 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=1584, Invalid=17048, Unknown=0, NotChecked=0, Total=18632 [2023-12-19 18:19:52,778 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 258 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 2227 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 2227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:19:52,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 154 Invalid, 2420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 2227 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-19 18:19:52,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2023-12-19 18:19:53,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 435. [2023-12-19 18:19:53,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 1.4170506912442395) internal successors, (615), 434 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:53,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 615 transitions. [2023-12-19 18:19:53,013 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 615 transitions. Word has length 32 [2023-12-19 18:19:53,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:19:53,013 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 615 transitions. [2023-12-19 18:19:53,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:53,013 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 615 transitions. [2023-12-19 18:19:53,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-19 18:19:53,014 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:19:53,014 INFO L195 NwaCegarLoop]: trace histogram [11, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:19:53,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-19 18:19:53,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:19:53,214 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:19:53,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:19:53,215 INFO L85 PathProgramCache]: Analyzing trace with hash 65669607, now seen corresponding path program 7 times [2023-12-19 18:19:53,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:19:53,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806683143] [2023-12-19 18:19:53,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:19:53,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:19:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:19:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-19 18:19:53,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:19:53,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806683143] [2023-12-19 18:19:53,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806683143] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:19:53,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634912815] [2023-12-19 18:19:53,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 18:19:53,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:19:53,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:19:53,417 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:19:53,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-19 18:19:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:19:53,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-19 18:19:53,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:19:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-19 18:19:53,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:19:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-12-19 18:19:53,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634912815] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:19:53,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:19:53,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 10] total 30 [2023-12-19 18:19:53,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478733362] [2023-12-19 18:19:53,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:19:53,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-19 18:19:53,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:19:53,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-19 18:19:53,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2023-12-19 18:19:53,708 INFO L87 Difference]: Start difference. First operand 435 states and 615 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:56,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:19:56,340 INFO L93 Difference]: Finished difference Result 891 states and 1259 transitions. [2023-12-19 18:19:56,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-12-19 18:19:56,341 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-12-19 18:19:56,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:19:56,343 INFO L225 Difference]: With dead ends: 891 [2023-12-19 18:19:56,343 INFO L226 Difference]: Without dead ends: 708 [2023-12-19 18:19:56,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2158 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=644, Invalid=7546, Unknown=0, NotChecked=0, Total=8190 [2023-12-19 18:19:56,344 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 172 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-19 18:19:56,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 1006 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-19 18:19:56,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2023-12-19 18:19:56,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 478. [2023-12-19 18:19:56,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 1.3815513626834381) internal successors, (659), 477 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:56,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 659 transitions. [2023-12-19 18:19:56,576 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 659 transitions. Word has length 32 [2023-12-19 18:19:56,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:19:56,576 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 659 transitions. [2023-12-19 18:19:56,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:19:56,576 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 659 transitions. [2023-12-19 18:19:56,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-19 18:19:56,577 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:19:56,577 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:19:56,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-12-19 18:19:56,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:19:56,783 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:19:56,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:19:56,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1554749943, now seen corresponding path program 8 times [2023-12-19 18:19:56,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:19:56,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603444846] [2023-12-19 18:19:56,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:19:56,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:19:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:19:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-19 18:19:57,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:19:57,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603444846] [2023-12-19 18:19:57,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603444846] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:19:57,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076826916] [2023-12-19 18:19:57,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:19:57,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:19:57,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:19:57,014 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:19:57,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-19 18:19:57,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:19:57,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:19:57,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 59 conjunts are in the unsatisfiable core [2023-12-19 18:19:57,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:19:57,198 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-19 18:19:57,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:19:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-19 18:19:57,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076826916] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:19:57,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:19:57,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 20] total 45 [2023-12-19 18:19:57,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51184591] [2023-12-19 18:19:57,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:19:57,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-12-19 18:19:57,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:19:57,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-12-19 18:19:57,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1731, Unknown=0, NotChecked=0, Total=1980 [2023-12-19 18:19:57,650 INFO L87 Difference]: Start difference. First operand 478 states and 659 transitions. Second operand has 45 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 45 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:20:10,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:20:10,404 INFO L93 Difference]: Finished difference Result 815 states and 1079 transitions. [2023-12-19 18:20:10,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-12-19 18:20:10,405 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 45 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-19 18:20:10,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:20:10,407 INFO L225 Difference]: With dead ends: 815 [2023-12-19 18:20:10,407 INFO L226 Difference]: Without dead ends: 688 [2023-12-19 18:20:10,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3406 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1088, Invalid=12252, Unknown=0, NotChecked=0, Total=13340 [2023-12-19 18:20:10,408 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 245 mSDsluCounter, 1212 mSDsCounter, 0 mSdLazyCounter, 2252 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1271 SdHoareTripleChecker+Invalid, 2482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 2252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-19 18:20:10,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 1271 Invalid, 2482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 2252 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-19 18:20:10,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2023-12-19 18:20:10,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 508. [2023-12-19 18:20:10,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 1.3629191321499015) internal successors, (691), 507 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:20:10,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 691 transitions. [2023-12-19 18:20:10,787 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 691 transitions. Word has length 34 [2023-12-19 18:20:10,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:20:10,788 INFO L495 AbstractCegarLoop]: Abstraction has 508 states and 691 transitions. [2023-12-19 18:20:10,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 45 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:20:10,788 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 691 transitions. [2023-12-19 18:20:10,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-19 18:20:10,788 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:20:10,788 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:20:10,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-12-19 18:20:10,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-12-19 18:20:10,989 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:20:10,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:20:10,989 INFO L85 PathProgramCache]: Analyzing trace with hash -2049057390, now seen corresponding path program 9 times [2023-12-19 18:20:10,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:20:10,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029818566] [2023-12-19 18:20:10,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:20:10,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:20:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:20:11,301 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:20:11,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:20:11,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029818566] [2023-12-19 18:20:11,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029818566] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:20:11,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395549900] [2023-12-19 18:20:11,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 18:20:11,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:20:11,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:20:11,304 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:20:11,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-19 18:20:11,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-19 18:20:11,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:20:11,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-19 18:20:11,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:20:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-19 18:20:11,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:20:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-19 18:20:12,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395549900] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:20:12,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:20:12,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 11] total 30 [2023-12-19 18:20:12,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660038042] [2023-12-19 18:20:12,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:20:12,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-19 18:20:12,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:20:12,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-19 18:20:12,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2023-12-19 18:20:12,076 INFO L87 Difference]: Start difference. First operand 508 states and 691 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:21:01,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:21:01,831 INFO L93 Difference]: Finished difference Result 705 states and 985 transitions. [2023-12-19 18:21:01,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2023-12-19 18:21:01,831 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-12-19 18:21:01,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:21:01,832 INFO L225 Difference]: With dead ends: 705 [2023-12-19 18:21:01,832 INFO L226 Difference]: Without dead ends: 649 [2023-12-19 18:21:01,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 52 SyntacticMatches, 16 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12368 ImplicationChecksByTransitivity, 44.7s TimeCoverageRelationStatistics Valid=2583, Invalid=32573, Unknown=0, NotChecked=0, Total=35156 [2023-12-19 18:21:01,834 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 514 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 3545 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 3827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 3545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:21:01,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 144 Invalid, 3827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 3545 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-12-19 18:21:01,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2023-12-19 18:21:02,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 520. [2023-12-19 18:21:02,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 1.3506743737957612) internal successors, (701), 519 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:21:02,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 701 transitions. [2023-12-19 18:21:02,194 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 701 transitions. Word has length 35 [2023-12-19 18:21:02,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:21:02,194 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 701 transitions. [2023-12-19 18:21:02,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:21:02,194 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 701 transitions. [2023-12-19 18:21:02,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-19 18:21:02,195 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:21:02,195 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:21:02,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-12-19 18:21:02,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-19 18:21:02,396 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:21:02,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:21:02,396 INFO L85 PathProgramCache]: Analyzing trace with hash -264677034, now seen corresponding path program 13 times [2023-12-19 18:21:02,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:21:02,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860935155] [2023-12-19 18:21:02,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:21:02,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:21:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:21:02,538 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-19 18:21:02,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:21:02,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860935155] [2023-12-19 18:21:02,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860935155] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:21:02,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082029785] [2023-12-19 18:21:02,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 18:21:02,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:21:02,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:21:02,540 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:21:02,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-19 18:21:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:21:02,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-19 18:21:02,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:21:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-19 18:21:02,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:21:02,741 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-19 18:21:02,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082029785] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:21:02,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:21:02,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2023-12-19 18:21:02,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498622778] [2023-12-19 18:21:02,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:21:02,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 18:21:02,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:21:02,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 18:21:02,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-19 18:21:02,742 INFO L87 Difference]: Start difference. First operand 520 states and 701 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:21:03,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:21:03,107 INFO L93 Difference]: Finished difference Result 567 states and 773 transitions. [2023-12-19 18:21:03,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 18:21:03,107 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-12-19 18:21:03,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:21:03,109 INFO L225 Difference]: With dead ends: 567 [2023-12-19 18:21:03,109 INFO L226 Difference]: Without dead ends: 504 [2023-12-19 18:21:03,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 15 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-19 18:21:03,109 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:21:03,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 78 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:21:03,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2023-12-19 18:21:03,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 504. [2023-12-19 18:21:03,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 1.3578528827037772) internal successors, (683), 503 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:21:03,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 683 transitions. [2023-12-19 18:21:03,386 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 683 transitions. Word has length 36 [2023-12-19 18:21:03,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:21:03,387 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 683 transitions. [2023-12-19 18:21:03,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:21:03,387 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 683 transitions. [2023-12-19 18:21:03,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-19 18:21:03,388 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:21:03,388 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:21:03,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-12-19 18:21:03,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:21:03,594 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:21:03,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:21:03,594 INFO L85 PathProgramCache]: Analyzing trace with hash -2046252361, now seen corresponding path program 14 times [2023-12-19 18:21:03,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:21:03,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446953584] [2023-12-19 18:21:03,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:21:03,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:21:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:21:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-19 18:21:03,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:21:03,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446953584] [2023-12-19 18:21:03,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446953584] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:21:03,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473357629] [2023-12-19 18:21:03,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:21:03,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:21:03,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:21:03,860 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:21:03,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-19 18:21:03,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:21:03,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:21:03,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 75 conjunts are in the unsatisfiable core [2023-12-19 18:21:03,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:21:04,176 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:21:04,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:21:04,592 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-19 18:21:04,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473357629] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:21:04,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:21:04,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27, 17] total 48 [2023-12-19 18:21:04,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690197119] [2023-12-19 18:21:04,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:21:04,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-19 18:21:04,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:21:04,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-19 18:21:04,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1877, Unknown=0, NotChecked=0, Total=2256 [2023-12-19 18:21:04,593 INFO L87 Difference]: Start difference. First operand 504 states and 683 transitions. Second operand has 48 states, 48 states have (on average 1.5) internal successors, (72), 48 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:21:12,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:21:12,709 INFO L93 Difference]: Finished difference Result 1094 states and 1521 transitions. [2023-12-19 18:21:12,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2023-12-19 18:21:12,710 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.5) internal successors, (72), 48 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-12-19 18:21:12,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:21:12,712 INFO L225 Difference]: With dead ends: 1094 [2023-12-19 18:21:12,712 INFO L226 Difference]: Without dead ends: 886 [2023-12-19 18:21:12,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10021 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=3321, Invalid=25749, Unknown=0, NotChecked=0, Total=29070 [2023-12-19 18:21:12,713 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 250 mSDsluCounter, 1198 mSDsCounter, 0 mSdLazyCounter, 3895 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 4414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 3895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:21:12,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 1259 Invalid, 4414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 3895 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-19 18:21:12,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2023-12-19 18:21:13,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 448. [2023-12-19 18:21:13,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.378076062639821) internal successors, (616), 447 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:21:13,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 616 transitions. [2023-12-19 18:21:13,012 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 616 transitions. Word has length 36 [2023-12-19 18:21:13,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:21:13,013 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 616 transitions. [2023-12-19 18:21:13,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.5) internal successors, (72), 48 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:21:13,013 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 616 transitions. [2023-12-19 18:21:13,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-19 18:21:13,013 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:21:13,013 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:21:13,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-12-19 18:21:13,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-12-19 18:21:13,214 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:21:13,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:21:13,214 INFO L85 PathProgramCache]: Analyzing trace with hash -349083083, now seen corresponding path program 9 times [2023-12-19 18:21:13,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:21:13,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678528436] [2023-12-19 18:21:13,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:21:13,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:21:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:21:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-19 18:21:13,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:21:13,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678528436] [2023-12-19 18:21:13,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678528436] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:21:13,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713819481] [2023-12-19 18:21:13,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 18:21:13,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:21:13,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:21:13,484 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:21:13,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-19 18:21:13,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-19 18:21:13,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:21:13,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-19 18:21:13,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:21:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-19 18:21:13,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:21:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-19 18:21:14,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713819481] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:21:14,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:21:14,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 11] total 39 [2023-12-19 18:21:14,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973867808] [2023-12-19 18:21:14,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:21:14,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-19 18:21:14,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:21:14,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-19 18:21:14,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2023-12-19 18:21:14,112 INFO L87 Difference]: Start difference. First operand 448 states and 616 transitions. Second operand has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:22:06,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:22:06,097 INFO L93 Difference]: Finished difference Result 1027 states and 1464 transitions. [2023-12-19 18:22:06,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 244 states. [2023-12-19 18:22:06,098 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-12-19 18:22:06,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:22:06,100 INFO L225 Difference]: With dead ends: 1027 [2023-12-19 18:22:06,100 INFO L226 Difference]: Without dead ends: 881 [2023-12-19 18:22:06,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25736 ImplicationChecksByTransitivity, 47.3s TimeCoverageRelationStatistics Valid=6309, Invalid=61031, Unknown=0, NotChecked=0, Total=67340 [2023-12-19 18:22:06,102 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 462 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 3021 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 3439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 3021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-12-19 18:22:06,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 807 Invalid, 3439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 3021 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-12-19 18:22:06,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2023-12-19 18:22:06,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 486. [2023-12-19 18:22:06,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 1.3670103092783505) internal successors, (663), 485 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:22:06,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 663 transitions. [2023-12-19 18:22:06,404 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 663 transitions. Word has length 37 [2023-12-19 18:22:06,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:22:06,404 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 663 transitions. [2023-12-19 18:22:06,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:22:06,404 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 663 transitions. [2023-12-19 18:22:06,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-19 18:22:06,405 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:22:06,405 INFO L195 NwaCegarLoop]: trace histogram [13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:22:06,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-12-19 18:22:06,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-19 18:22:06,611 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:22:06,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:22:06,611 INFO L85 PathProgramCache]: Analyzing trace with hash -680983323, now seen corresponding path program 15 times [2023-12-19 18:22:06,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:22:06,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682720758] [2023-12-19 18:22:06,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:22:06,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:22:06,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:22:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-19 18:22:06,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:22:06,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682720758] [2023-12-19 18:22:06,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682720758] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:22:06,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059562710] [2023-12-19 18:22:06,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 18:22:06,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:22:06,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:22:06,912 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:22:06,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-19 18:22:06,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-19 18:22:06,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:22:06,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-19 18:22:06,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:22:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-12-19 18:22:07,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:22:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-12-19 18:22:07,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059562710] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:22:07,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:22:07,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 18] total 47 [2023-12-19 18:22:07,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618587885] [2023-12-19 18:22:07,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:22:07,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-19 18:22:07,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:22:07,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-19 18:22:07,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1966, Unknown=0, NotChecked=0, Total=2162 [2023-12-19 18:22:07,803 INFO L87 Difference]: Start difference. First operand 486 states and 663 transitions. Second operand has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:22:18,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:22:18,278 INFO L93 Difference]: Finished difference Result 1100 states and 1500 transitions. [2023-12-19 18:22:18,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2023-12-19 18:22:18,278 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-12-19 18:22:18,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:22:18,280 INFO L225 Difference]: With dead ends: 1100 [2023-12-19 18:22:18,280 INFO L226 Difference]: Without dead ends: 835 [2023-12-19 18:22:18,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8446 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=3039, Invalid=27411, Unknown=0, NotChecked=0, Total=30450 [2023-12-19 18:22:18,282 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 241 mSDsluCounter, 1647 mSDsCounter, 0 mSdLazyCounter, 5103 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 5653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 5103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-19 18:22:18,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 1706 Invalid, 5653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 5103 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-19 18:22:18,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2023-12-19 18:22:18,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 531. [2023-12-19 18:22:18,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.381132075471698) internal successors, (732), 530 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:22:18,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 732 transitions. [2023-12-19 18:22:18,681 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 732 transitions. Word has length 38 [2023-12-19 18:22:18,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:22:18,681 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 732 transitions. [2023-12-19 18:22:18,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:22:18,681 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 732 transitions. [2023-12-19 18:22:18,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-19 18:22:18,682 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:22:18,682 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:22:18,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-12-19 18:22:18,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-12-19 18:22:18,883 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:22:18,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:22:18,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1073563949, now seen corresponding path program 10 times [2023-12-19 18:22:18,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:22:18,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882412401] [2023-12-19 18:22:18,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:22:18,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:22:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:22:19,235 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 18:22:19,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:22:19,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882412401] [2023-12-19 18:22:19,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882412401] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:22:19,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080609782] [2023-12-19 18:22:19,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 18:22:19,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:22:19,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:22:19,236 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:22:19,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-19 18:22:19,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 18:22:19,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:22:19,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-19 18:22:19,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:22:19,559 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-19 18:22:19,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:22:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-19 18:22:19,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080609782] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:22:19,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:22:19,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 12] total 33 [2023-12-19 18:22:19,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337762817] [2023-12-19 18:22:19,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:22:19,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-19 18:22:19,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:22:19,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-19 18:22:19,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2023-12-19 18:22:19,990 INFO L87 Difference]: Start difference. First operand 531 states and 732 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:23:01,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:23:01,839 INFO L93 Difference]: Finished difference Result 735 states and 1062 transitions. [2023-12-19 18:23:01,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-12-19 18:23:01,839 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-12-19 18:23:01,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:23:01,841 INFO L225 Difference]: With dead ends: 735 [2023-12-19 18:23:01,841 INFO L226 Difference]: Without dead ends: 629 [2023-12-19 18:23:01,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 58 SyntacticMatches, 18 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5668 ImplicationChecksByTransitivity, 39.4s TimeCoverageRelationStatistics Valid=1921, Invalid=17819, Unknown=0, NotChecked=0, Total=19740 [2023-12-19 18:23:01,842 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 153 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 2519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-19 18:23:01,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 176 Invalid, 2519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-19 18:23:01,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2023-12-19 18:23:02,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 553. [2023-12-19 18:23:02,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 1.3478260869565217) internal successors, (744), 552 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:23:02,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 744 transitions. [2023-12-19 18:23:02,274 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 744 transitions. Word has length 39 [2023-12-19 18:23:02,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:23:02,274 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 744 transitions. [2023-12-19 18:23:02,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:23:02,274 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 744 transitions. [2023-12-19 18:23:02,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-19 18:23:02,275 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:23:02,275 INFO L195 NwaCegarLoop]: trace histogram [14, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:23:02,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-12-19 18:23:02,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:23:02,481 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:23:02,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:23:02,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1557158412, now seen corresponding path program 11 times [2023-12-19 18:23:02,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:23:02,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502166906] [2023-12-19 18:23:02,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:23:02,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:23:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:23:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-19 18:23:02,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:23:02,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502166906] [2023-12-19 18:23:02,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502166906] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:23:02,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337322368] [2023-12-19 18:23:02,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 18:23:02,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:23:02,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:23:02,817 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:23:02,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-19 18:23:03,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-12-19 18:23:03,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:23:03,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 79 conjunts are in the unsatisfiable core [2023-12-19 18:23:03,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:23:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:23:03,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:23:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-12-19 18:23:04,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337322368] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:23:04,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:23:04,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 31, 19] total 55 [2023-12-19 18:23:04,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006818367] [2023-12-19 18:23:04,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:23:04,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-12-19 18:23:04,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:23:04,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-12-19 18:23:04,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=2495, Unknown=0, NotChecked=0, Total=2970 [2023-12-19 18:23:04,120 INFO L87 Difference]: Start difference. First operand 553 states and 744 transitions. Second operand has 55 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 55 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:23:16,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:23:16,568 INFO L93 Difference]: Finished difference Result 1360 states and 1866 transitions. [2023-12-19 18:23:16,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2023-12-19 18:23:16,569 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 55 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-12-19 18:23:16,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:23:16,571 INFO L225 Difference]: With dead ends: 1360 [2023-12-19 18:23:16,571 INFO L226 Difference]: Without dead ends: 1103 [2023-12-19 18:23:16,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11326 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=3470, Invalid=31312, Unknown=0, NotChecked=0, Total=34782 [2023-12-19 18:23:16,573 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 270 mSDsluCounter, 1499 mSDsCounter, 0 mSdLazyCounter, 5708 mSolverCounterSat, 492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1567 SdHoareTripleChecker+Invalid, 6200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 5708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:23:16,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 1567 Invalid, 6200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 5708 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-12-19 18:23:16,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2023-12-19 18:23:17,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 600. [2023-12-19 18:23:17,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 1.333889816360601) internal successors, (799), 599 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:23:17,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 799 transitions. [2023-12-19 18:23:17,032 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 799 transitions. Word has length 39 [2023-12-19 18:23:17,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:23:17,032 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 799 transitions. [2023-12-19 18:23:17,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 55 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:23:17,032 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 799 transitions. [2023-12-19 18:23:17,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-19 18:23:17,033 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:23:17,033 INFO L195 NwaCegarLoop]: trace histogram [15, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:23:17,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-12-19 18:23:17,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:23:17,233 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:23:17,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:23:17,234 INFO L85 PathProgramCache]: Analyzing trace with hash -2141934014, now seen corresponding path program 16 times [2023-12-19 18:23:17,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:23:17,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544417479] [2023-12-19 18:23:17,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:23:17,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:23:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:23:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-19 18:23:17,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:23:17,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544417479] [2023-12-19 18:23:17,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544417479] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:23:17,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552100835] [2023-12-19 18:23:17,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 18:23:17,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:23:17,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:23:17,554 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:23:17,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-12-19 18:23:17,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 18:23:17,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:23:17,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-19 18:23:17,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:23:17,727 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-19 18:23:17,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:23:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-12-19 18:23:17,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552100835] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:23:17,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:23:17,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 10] total 36 [2023-12-19 18:23:17,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438051025] [2023-12-19 18:23:17,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:23:17,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-19 18:23:17,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:23:17,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-19 18:23:17,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2023-12-19 18:23:17,925 INFO L87 Difference]: Start difference. First operand 600 states and 799 transitions. Second operand has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:23:20,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:23:20,382 INFO L93 Difference]: Finished difference Result 1380 states and 1836 transitions. [2023-12-19 18:23:20,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-12-19 18:23:20,382 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-12-19 18:23:20,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:23:20,385 INFO L225 Difference]: With dead ends: 1380 [2023-12-19 18:23:20,385 INFO L226 Difference]: Without dead ends: 1136 [2023-12-19 18:23:20,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1001, Invalid=3289, Unknown=0, NotChecked=0, Total=4290 [2023-12-19 18:23:20,386 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 420 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 1903 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 1280 SdHoareTripleChecker+Invalid, 2110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-19 18:23:20,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 1280 Invalid, 2110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1903 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-19 18:23:20,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2023-12-19 18:23:20,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 687. [2023-12-19 18:23:20,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 1.2784256559766765) internal successors, (877), 686 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:23:20,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 877 transitions. [2023-12-19 18:23:20,880 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 877 transitions. Word has length 41 [2023-12-19 18:23:20,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:23:20,880 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 877 transitions. [2023-12-19 18:23:20,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:23:20,881 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 877 transitions. [2023-12-19 18:23:20,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-19 18:23:20,882 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:23:20,882 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:23:20,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-12-19 18:23:21,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-12-19 18:23:21,083 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:23:21,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:23:21,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1523110455, now seen corresponding path program 12 times [2023-12-19 18:23:21,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:23:21,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648206818] [2023-12-19 18:23:21,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:23:21,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:23:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:23:21,403 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-12-19 18:23:21,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:23:21,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648206818] [2023-12-19 18:23:21,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648206818] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:23:21,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442690171] [2023-12-19 18:23:21,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 18:23:21,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:23:21,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:23:21,405 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:23:21,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-12-19 18:23:21,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-12-19 18:23:21,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:23:21,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-19 18:23:21,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:23:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-12-19 18:23:21,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:23:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-12-19 18:23:22,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442690171] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:23:22,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:23:22,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 53 [2023-12-19 18:23:22,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937080538] [2023-12-19 18:23:22,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:23:22,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-12-19 18:23:22,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:23:22,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-12-19 18:23:22,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=2411, Unknown=0, NotChecked=0, Total=2756 [2023-12-19 18:23:22,445 INFO L87 Difference]: Start difference. First operand 687 states and 877 transitions. Second operand has 53 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:23:57,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:23:57,637 INFO L93 Difference]: Finished difference Result 1063 states and 1329 transitions. [2023-12-19 18:23:57,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-12-19 18:23:57,638 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-12-19 18:23:57,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:23:57,640 INFO L225 Difference]: With dead ends: 1063 [2023-12-19 18:23:57,640 INFO L226 Difference]: Without dead ends: 874 [2023-12-19 18:23:57,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=933, Invalid=7077, Unknown=0, NotChecked=0, Total=8010 [2023-12-19 18:23:57,640 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 450 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 2489 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 2685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 2489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-12-19 18:23:57,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 1330 Invalid, 2685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 2489 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-12-19 18:23:57,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2023-12-19 18:23:58,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 646. [2023-12-19 18:23:58,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 1.2666666666666666) internal successors, (817), 645 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:23:58,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 817 transitions. [2023-12-19 18:23:58,105 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 817 transitions. Word has length 42 [2023-12-19 18:23:58,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:23:58,105 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 817 transitions. [2023-12-19 18:23:58,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:23:58,105 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 817 transitions. [2023-12-19 18:23:58,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-19 18:23:58,106 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:23:58,106 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:23:58,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-12-19 18:23:58,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-12-19 18:23:58,306 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:23:58,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:23:58,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1702945065, now seen corresponding path program 13 times [2023-12-19 18:23:58,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:23:58,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889079361] [2023-12-19 18:23:58,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:23:58,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:23:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:23:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 18:23:58,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:23:58,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889079361] [2023-12-19 18:23:58,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889079361] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:23:58,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805425670] [2023-12-19 18:23:58,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 18:23:58,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:23:58,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:23:58,717 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:23:58,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-12-19 18:23:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:23:58,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-19 18:23:58,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:23:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 24 proven. 86 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-19 18:23:59,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:23:59,583 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 24 proven. 86 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-19 18:23:59,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805425670] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:23:59,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:23:59,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13, 13] total 36 [2023-12-19 18:23:59,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306143316] [2023-12-19 18:23:59,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:23:59,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-19 18:23:59,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:23:59,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-19 18:23:59,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2023-12-19 18:23:59,584 INFO L87 Difference]: Start difference. First operand 646 states and 817 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:25:51,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:25:51,926 INFO L93 Difference]: Finished difference Result 879 states and 1194 transitions. [2023-12-19 18:25:51,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2023-12-19 18:25:51,927 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-12-19 18:25:51,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:25:51,928 INFO L225 Difference]: With dead ends: 879 [2023-12-19 18:25:51,928 INFO L226 Difference]: Without dead ends: 808 [2023-12-19 18:25:51,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 62 SyntacticMatches, 20 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14685 ImplicationChecksByTransitivity, 105.6s TimeCoverageRelationStatistics Valid=3376, Invalid=40096, Unknown=0, NotChecked=0, Total=43472 [2023-12-19 18:25:51,930 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 260 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 4459 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 4755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 4459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-12-19 18:25:51,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 263 Invalid, 4755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 4459 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-12-19 18:25:51,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2023-12-19 18:25:52,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 660. [2023-12-19 18:25:52,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 1.2625189681335356) internal successors, (832), 659 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:25:52,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 832 transitions. [2023-12-19 18:25:52,417 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 832 transitions. Word has length 42 [2023-12-19 18:25:52,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:25:52,417 INFO L495 AbstractCegarLoop]: Abstraction has 660 states and 832 transitions. [2023-12-19 18:25:52,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:25:52,417 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 832 transitions. [2023-12-19 18:25:52,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-19 18:25:52,418 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:25:52,418 INFO L195 NwaCegarLoop]: trace histogram [16, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:25:52,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-12-19 18:25:52,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-12-19 18:25:52,624 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:25:52,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:25:52,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1821587031, now seen corresponding path program 14 times [2023-12-19 18:25:52,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:25:52,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050400520] [2023-12-19 18:25:52,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:25:52,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:25:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:25:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-19 18:25:52,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:25:52,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050400520] [2023-12-19 18:25:52,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050400520] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:25:52,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565064096] [2023-12-19 18:25:52,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:25:52,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:25:52,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:25:52,983 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:25:52,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-12-19 18:25:53,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:25:53,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:25:53,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 58 conjunts are in the unsatisfiable core [2023-12-19 18:25:53,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:25:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-19 18:25:53,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:25:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-12-19 18:25:53,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565064096] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:25:53,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:25:53,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 14] total 43 [2023-12-19 18:25:53,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740431527] [2023-12-19 18:25:53,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:25:53,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-19 18:25:53,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:25:53,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-19 18:25:53,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2023-12-19 18:25:53,552 INFO L87 Difference]: Start difference. First operand 660 states and 832 transitions. Second operand has 43 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:26:04,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:26:04,494 INFO L93 Difference]: Finished difference Result 1285 states and 1610 transitions. [2023-12-19 18:26:04,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2023-12-19 18:26:04,495 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-12-19 18:26:04,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:26:04,497 INFO L225 Difference]: With dead ends: 1285 [2023-12-19 18:26:04,497 INFO L226 Difference]: Without dead ends: 991 [2023-12-19 18:26:04,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7432 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1482, Invalid=23324, Unknown=0, NotChecked=0, Total=24806 [2023-12-19 18:26:04,499 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 278 mSDsluCounter, 2021 mSDsCounter, 0 mSdLazyCounter, 3106 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 2112 SdHoareTripleChecker+Invalid, 3398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 3106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-19 18:26:04,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 2112 Invalid, 3398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 3106 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-19 18:26:04,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2023-12-19 18:26:04,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 599. [2023-12-19 18:26:04,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 1.2909698996655519) internal successors, (772), 598 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:26:04,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 772 transitions. [2023-12-19 18:26:05,000 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 772 transitions. Word has length 42 [2023-12-19 18:26:05,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:26:05,000 INFO L495 AbstractCegarLoop]: Abstraction has 599 states and 772 transitions. [2023-12-19 18:26:05,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:26:05,000 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 772 transitions. [2023-12-19 18:26:05,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-19 18:26:05,001 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:26:05,001 INFO L195 NwaCegarLoop]: trace histogram [17, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:26:05,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-12-19 18:26:05,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-12-19 18:26:05,207 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:26:05,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:26:05,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1220518553, now seen corresponding path program 17 times [2023-12-19 18:26:05,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:26:05,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20115207] [2023-12-19 18:26:05,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:26:05,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:26:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:26:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-19 18:26:05,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:26:05,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20115207] [2023-12-19 18:26:05,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20115207] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:26:05,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264765719] [2023-12-19 18:26:05,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 18:26:05,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:26:05,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:26:05,600 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:26:05,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-12-19 18:26:09,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-12-19 18:26:09,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:26:09,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 93 conjunts are in the unsatisfiable core [2023-12-19 18:26:09,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:26:09,676 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:26:09,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:26:10,354 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-12-19 18:26:10,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264765719] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:26:10,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:26:10,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 36, 21] total 62 [2023-12-19 18:26:10,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708345764] [2023-12-19 18:26:10,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:26:10,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-12-19 18:26:10,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:26:10,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-12-19 18:26:10,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=3204, Unknown=0, NotChecked=0, Total=3782 [2023-12-19 18:26:10,356 INFO L87 Difference]: Start difference. First operand 599 states and 772 transitions. Second operand has 62 states, 62 states have (on average 1.3548387096774193) internal successors, (84), 62 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:26:30,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:26:30,405 INFO L93 Difference]: Finished difference Result 1418 states and 1851 transitions. [2023-12-19 18:26:30,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2023-12-19 18:26:30,406 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.3548387096774193) internal successors, (84), 62 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-12-19 18:26:30,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:26:30,408 INFO L225 Difference]: With dead ends: 1418 [2023-12-19 18:26:30,408 INFO L226 Difference]: Without dead ends: 1220 [2023-12-19 18:26:30,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22364 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=5814, Invalid=56436, Unknown=0, NotChecked=0, Total=62250 [2023-12-19 18:26:30,411 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 449 mSDsluCounter, 2109 mSDsCounter, 0 mSdLazyCounter, 7360 mSolverCounterSat, 857 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 2195 SdHoareTripleChecker+Invalid, 8217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 857 IncrementalHoareTripleChecker+Valid, 7360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-12-19 18:26:30,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 2195 Invalid, 8217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [857 Valid, 7360 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-12-19 18:26:30,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2023-12-19 18:26:30,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 586. [2023-12-19 18:26:30,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 1.3247863247863247) internal successors, (775), 585 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:26:30,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 775 transitions. [2023-12-19 18:26:30,995 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 775 transitions. Word has length 44 [2023-12-19 18:26:30,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:26:30,996 INFO L495 AbstractCegarLoop]: Abstraction has 586 states and 775 transitions. [2023-12-19 18:26:30,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.3548387096774193) internal successors, (84), 62 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:26:30,996 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 775 transitions. [2023-12-19 18:26:30,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-19 18:26:30,997 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:26:30,997 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:26:31,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-12-19 18:26:31,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:26:31,204 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:26:31,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:26:31,205 INFO L85 PathProgramCache]: Analyzing trace with hash 302468341, now seen corresponding path program 15 times [2023-12-19 18:26:31,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:26:31,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604164795] [2023-12-19 18:26:31,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:26:31,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:26:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:26:31,525 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-19 18:26:31,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:26:31,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604164795] [2023-12-19 18:26:31,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604164795] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:26:31,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355272695] [2023-12-19 18:26:31,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 18:26:31,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:26:31,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:26:31,526 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:26:31,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-12-19 18:26:31,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-19 18:26:31,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:26:31,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-19 18:26:31,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:26:32,146 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-12-19 18:26:32,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:26:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-12-19 18:26:32,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355272695] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:26:32,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:26:32,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13, 13] total 47 [2023-12-19 18:26:32,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209853159] [2023-12-19 18:26:32,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:26:32,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-19 18:26:32,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:26:32,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-19 18:26:32,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1944, Unknown=0, NotChecked=0, Total=2162 [2023-12-19 18:26:32,550 INFO L87 Difference]: Start difference. First operand 586 states and 775 transitions. Second operand has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 47 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:29:31,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:29:31,001 INFO L93 Difference]: Finished difference Result 1330 states and 1772 transitions. [2023-12-19 18:29:31,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 313 states. [2023-12-19 18:29:31,001 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 47 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-12-19 18:29:31,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:29:31,004 INFO L225 Difference]: With dead ends: 1330 [2023-12-19 18:29:31,004 INFO L226 Difference]: Without dead ends: 1178 [2023-12-19 18:29:31,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43746 ImplicationChecksByTransitivity, 172.8s TimeCoverageRelationStatistics Valid=10068, Invalid=100487, Unknown=1, NotChecked=0, Total=110556 [2023-12-19 18:29:31,008 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 634 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 3776 mSolverCounterSat, 717 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 4493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 717 IncrementalHoareTripleChecker+Valid, 3776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-12-19 18:29:31,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 965 Invalid, 4493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [717 Valid, 3776 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-12-19 18:29:31,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2023-12-19 18:29:31,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 606. [2023-12-19 18:29:31,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 1.3702479338842974) internal successors, (829), 605 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:29:31,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 829 transitions. [2023-12-19 18:29:31,539 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 829 transitions. Word has length 45 [2023-12-19 18:29:31,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:29:31,539 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 829 transitions. [2023-12-19 18:29:31,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 47 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:29:31,539 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 829 transitions. [2023-12-19 18:29:31,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-19 18:29:31,540 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:29:31,540 INFO L195 NwaCegarLoop]: trace histogram [18, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:29:31,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-12-19 18:29:31,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-12-19 18:29:31,741 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:29:31,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:29:31,741 INFO L85 PathProgramCache]: Analyzing trace with hash -664091339, now seen corresponding path program 18 times [2023-12-19 18:29:31,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:29:31,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187584642] [2023-12-19 18:29:31,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:29:31,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:29:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:29:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-19 18:29:32,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:29:32,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187584642] [2023-12-19 18:29:32,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187584642] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:29:32,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414604379] [2023-12-19 18:29:32,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 18:29:32,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:29:32,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:29:32,196 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:29:32,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-12-19 18:29:32,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-19 18:29:32,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:29:32,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-19 18:29:32,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:29:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2023-12-19 18:29:32,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:29:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2023-12-19 18:29:32,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414604379] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:29:32,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:29:32,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 8, 8] total 39 [2023-12-19 18:29:32,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45347759] [2023-12-19 18:29:32,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:29:32,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-19 18:29:32,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:29:32,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-19 18:29:32,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1336, Unknown=0, NotChecked=0, Total=1482 [2023-12-19 18:29:32,775 INFO L87 Difference]: Start difference. First operand 606 states and 829 transitions. Second operand has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 39 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:29:51,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:29:51,617 INFO L93 Difference]: Finished difference Result 2062 states and 2889 transitions. [2023-12-19 18:29:51,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 294 states. [2023-12-19 18:29:51,617 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 39 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-12-19 18:29:51,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:29:51,621 INFO L225 Difference]: With dead ends: 2062 [2023-12-19 18:29:51,621 INFO L226 Difference]: Without dead ends: 1839 [2023-12-19 18:29:51,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35397 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=4325, Invalid=87787, Unknown=0, NotChecked=0, Total=92112 [2023-12-19 18:29:51,625 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 446 mSDsluCounter, 1904 mSDsCounter, 0 mSdLazyCounter, 7512 mSolverCounterSat, 576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 1975 SdHoareTripleChecker+Invalid, 8088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 576 IncrementalHoareTripleChecker+Valid, 7512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-12-19 18:29:51,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 1975 Invalid, 8088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [576 Valid, 7512 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-12-19 18:29:51,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2023-12-19 18:29:52,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1066. [2023-12-19 18:29:52,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 1065 states have (on average 1.3906103286384977) internal successors, (1481), 1065 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:29:52,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1481 transitions. [2023-12-19 18:29:52,633 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1481 transitions. Word has length 46 [2023-12-19 18:29:52,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:29:52,633 INFO L495 AbstractCegarLoop]: Abstraction has 1066 states and 1481 transitions. [2023-12-19 18:29:52,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 39 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:29:52,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1481 transitions. [2023-12-19 18:29:52,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-19 18:29:52,634 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:29:52,634 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:29:52,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-12-19 18:29:52,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-12-19 18:29:52,835 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:29:52,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:29:52,835 INFO L85 PathProgramCache]: Analyzing trace with hash -2004063661, now seen corresponding path program 16 times [2023-12-19 18:29:52,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:29:52,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206248483] [2023-12-19 18:29:52,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:29:52,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:29:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:29:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-19 18:29:53,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:29:53,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206248483] [2023-12-19 18:29:53,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206248483] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:29:53,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108296091] [2023-12-19 18:29:53,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 18:29:53,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:29:53,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:29:53,297 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:29:53,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-12-19 18:29:53,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 18:29:53,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:29:53,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-19 18:29:53,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:29:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 35 proven. 97 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-19 18:29:53,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:29:54,369 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 35 proven. 97 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-19 18:29:54,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108296091] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:29:54,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:29:54,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14, 14] total 39 [2023-12-19 18:29:54,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934106037] [2023-12-19 18:29:54,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:29:54,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-19 18:29:54,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:29:54,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-19 18:29:54,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2023-12-19 18:29:54,370 INFO L87 Difference]: Start difference. First operand 1066 states and 1481 transitions. Second operand has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:32:35,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:32:35,476 INFO L93 Difference]: Finished difference Result 1457 states and 2060 transitions. [2023-12-19 18:32:35,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2023-12-19 18:32:35,476 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-12-19 18:32:35,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:32:35,479 INFO L225 Difference]: With dead ends: 1457 [2023-12-19 18:32:35,479 INFO L226 Difference]: Without dead ends: 1258 [2023-12-19 18:32:35,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 70 SyntacticMatches, 22 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11309 ImplicationChecksByTransitivity, 153.3s TimeCoverageRelationStatistics Valid=3520, Invalid=32770, Unknown=0, NotChecked=0, Total=36290 [2023-12-19 18:32:35,481 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 194 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 3792 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 4083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 3792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-12-19 18:32:35,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 239 Invalid, 4083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 3792 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-12-19 18:32:35,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2023-12-19 18:32:36,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1043. [2023-12-19 18:32:36,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1042 states have (on average 1.3512476007677543) internal successors, (1408), 1042 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:32:36,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1408 transitions. [2023-12-19 18:32:36,469 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1408 transitions. Word has length 47 [2023-12-19 18:32:36,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:32:36,469 INFO L495 AbstractCegarLoop]: Abstraction has 1043 states and 1408 transitions. [2023-12-19 18:32:36,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:32:36,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1408 transitions. [2023-12-19 18:32:36,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-19 18:32:36,471 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:32:36,471 INFO L195 NwaCegarLoop]: trace histogram [19, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:32:36,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-12-19 18:32:36,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-12-19 18:32:36,672 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:32:36,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:32:36,672 INFO L85 PathProgramCache]: Analyzing trace with hash 513891556, now seen corresponding path program 19 times [2023-12-19 18:32:36,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:32:36,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120070691] [2023-12-19 18:32:36,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:32:36,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:32:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:32:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-19 18:32:37,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:32:37,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120070691] [2023-12-19 18:32:37,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120070691] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:32:37,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279903658] [2023-12-19 18:32:37,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 18:32:37,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:32:37,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:32:37,104 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:32:37,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-12-19 18:32:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:32:37,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 60 conjunts are in the unsatisfiable core [2023-12-19 18:32:37,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:32:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-19 18:32:37,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:32:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-12-19 18:32:37,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279903658] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:32:37,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:32:37,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 12] total 44 [2023-12-19 18:32:37,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233277904] [2023-12-19 18:32:37,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:32:37,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-19 18:32:37,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:32:37,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-19 18:32:37,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1541, Unknown=0, NotChecked=0, Total=1892 [2023-12-19 18:32:37,606 INFO L87 Difference]: Start difference. First operand 1043 states and 1408 transitions. Second operand has 44 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 44 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:32:43,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:32:43,730 INFO L93 Difference]: Finished difference Result 2310 states and 3097 transitions. [2023-12-19 18:32:43,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-12-19 18:32:43,731 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 44 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-12-19 18:32:43,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:32:43,735 INFO L225 Difference]: With dead ends: 2310 [2023-12-19 18:32:43,735 INFO L226 Difference]: Without dead ends: 1933 [2023-12-19 18:32:43,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1839, Invalid=5817, Unknown=0, NotChecked=0, Total=7656 [2023-12-19 18:32:43,737 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 778 mSDsluCounter, 2256 mSDsCounter, 0 mSdLazyCounter, 3706 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 2359 SdHoareTripleChecker+Invalid, 3983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 3706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-19 18:32:43,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 2359 Invalid, 3983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 3706 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-19 18:32:43,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2023-12-19 18:32:44,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1068. [2023-12-19 18:32:44,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 1.338331771321462) internal successors, (1428), 1067 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:32:44,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1428 transitions. [2023-12-19 18:32:44,741 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1428 transitions. Word has length 49 [2023-12-19 18:32:44,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:32:44,741 INFO L495 AbstractCegarLoop]: Abstraction has 1068 states and 1428 transitions. [2023-12-19 18:32:44,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 44 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:32:44,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1428 transitions. [2023-12-19 18:32:44,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-19 18:32:44,743 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:32:44,743 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:32:44,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-12-19 18:32:44,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:32:44,944 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:32:44,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:32:44,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1865598345, now seen corresponding path program 17 times [2023-12-19 18:32:44,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:32:44,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835039643] [2023-12-19 18:32:44,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:32:44,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:32:44,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:32:45,380 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-12-19 18:32:45,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:32:45,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835039643] [2023-12-19 18:32:45,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835039643] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:32:45,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340352003] [2023-12-19 18:32:45,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 18:32:45,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:32:45,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:32:45,387 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:32:45,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process Received shutdown request... [2023-12-19 18:32:56,017 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-19 18:32:56,023 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-19 18:32:56,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-19 18:32:56,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:32:56,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 74 conjunts are in the unsatisfiable core [2023-12-19 18:32:56,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:32:56,063 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-19 18:32:56,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-12-19 18:32:56,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:32:56,264 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 51 with TraceHistMax 12,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. [2023-12-19 18:32:56,267 INFO L445 BasicCegarLoop]: Path program histogram: [19, 17, 9, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:32:56,269 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-19 18:32:56,270 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.12 06:32:56 BoogieIcfgContainer [2023-12-19 18:32:56,270 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-19 18:32:56,271 INFO L158 Benchmark]: Toolchain (without parser) took 857393.20ms. Allocated memory was 211.8MB in the beginning and 612.4MB in the end (delta: 400.6MB). Free memory was 161.6MB in the beginning and 526.5MB in the end (delta: -364.9MB). Peak memory consumption was 36.5MB. Max. memory is 8.0GB. [2023-12-19 18:32:56,271 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 211.8MB. Free memory is still 160.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-19 18:32:56,271 INFO L158 Benchmark]: CACSL2BoogieTranslator took 169.29ms. Allocated memory is still 211.8MB. Free memory was 161.6MB in the beginning and 150.8MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-19 18:32:56,271 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.45ms. Allocated memory is still 211.8MB. Free memory was 150.8MB in the beginning and 149.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-19 18:32:56,271 INFO L158 Benchmark]: Boogie Preprocessor took 28.32ms. Allocated memory is still 211.8MB. Free memory was 149.0MB in the beginning and 147.3MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-19 18:32:56,271 INFO L158 Benchmark]: RCFGBuilder took 296.64ms. Allocated memory is still 211.8MB. Free memory was 147.3MB in the beginning and 136.4MB in the end (delta: 10.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-19 18:32:56,271 INFO L158 Benchmark]: TraceAbstraction took 856859.35ms. Allocated memory was 211.8MB in the beginning and 612.4MB in the end (delta: 400.6MB). Free memory was 135.8MB in the beginning and 526.5MB in the end (delta: -390.8MB). Peak memory consumption was 11.4MB. Max. memory is 8.0GB. [2023-12-19 18:32:56,272 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 211.8MB. Free memory is still 160.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 169.29ms. Allocated memory is still 211.8MB. Free memory was 161.6MB in the beginning and 150.8MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 33.45ms. Allocated memory is still 211.8MB. Free memory was 150.8MB in the beginning and 149.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.32ms. Allocated memory is still 211.8MB. Free memory was 149.0MB in the beginning and 147.3MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 296.64ms. Allocated memory is still 211.8MB. Free memory was 147.3MB in the beginning and 136.4MB in the end (delta: 10.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 856859.35ms. Allocated memory was 211.8MB in the beginning and 612.4MB in the end (delta: 400.6MB). Free memory was 135.8MB in the beginning and 526.5MB in the end (delta: -390.8MB). Peak memory consumption was 11.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 7]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 7). Cancelled while NwaCegarLoop was analyzing trace of length 51 with TraceHistMax 12,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 856.8s, OverallIterations: 52, TraceHistogramMax: 19, PathProgramHistogramMax: 19, EmptinessCheckTime: 0.1s, AutomataDifference: 790.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9055 SdHoareTripleChecker+Valid, 67.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9055 mSDsluCounter, 26455 SdHoareTripleChecker+Invalid, 61.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 24868 mSDsCounter, 8760 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 83104 IncrementalHoareTripleChecker+Invalid, 91864 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8760 mSolverCounterUnsat, 1587 mSDtfsCounter, 83104 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6586 GetRequests, 2129 SyntacticMatches, 212 SemanticMatches, 4245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247708 ImplicationChecksByTransitivity, 715.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1068occurred in iteration=51, InterpolantAutomatonStates: 3847, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 11.0s AutomataMinimizationTime, 51 MinimizatonAttempts, 8048 StatesRemovedByMinimization, 36 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 6.5s SatisfiabilityAnalysisTime, 25.9s InterpolantComputationTime, 2754 NumberOfCodeBlocks, 2726 NumberOfCodeBlocksAsserted, 184 NumberOfCheckSat, 3961 ConstructedInterpolants, 0 QuantifiedInterpolants, 16794 SizeOfPredicates, 32 NumberOfNonLiveVariables, 6104 ConjunctsInSsa, 1431 ConjunctsInUnsatCore, 143 InterpolantComputations, 7 PerfectInterpolantSequences, 4810/11050 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown