/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/loopv3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 22:04:26,792 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 22:04:26,856 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 22:04:26,858 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 22:04:26,858 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 22:04:26,871 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 22:04:26,872 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 22:04:26,872 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 22:04:26,872 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 22:04:26,875 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 22:04:26,875 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 22:04:26,876 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 22:04:26,876 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 22:04:26,877 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 22:04:26,877 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 22:04:26,877 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 22:04:26,878 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 22:04:26,878 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 22:04:26,878 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 22:04:26,878 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 22:04:26,878 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 22:04:26,878 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 22:04:26,879 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 22:04:26,879 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 22:04:26,879 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 22:04:26,879 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 22:04:26,879 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 22:04:26,879 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 22:04:26,880 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 22:04:26,880 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 22:04:26,881 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 22:04:26,881 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 22:04:26,881 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 22:04:26,881 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 22:04:26,881 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 22:04:26,881 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 22:04:26,881 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 22:04:26,881 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 22:04:26,881 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 22:04:26,882 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 22:04:26,882 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 22:04:26,882 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 22:04:26,882 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 22:04:26,882 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 22:04:27,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 22:04:27,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 22:04:27,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 22:04:27,082 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 22:04:27,082 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 22:04:27,083 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv3.c [2023-12-15 22:04:28,160 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 22:04:28,284 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 22:04:28,284 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c [2023-12-15 22:04:28,290 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd5e4ea29/f2981020ca84413bba1431619ba57573/FLAGbc925f041 [2023-12-15 22:04:28,304 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd5e4ea29/f2981020ca84413bba1431619ba57573 [2023-12-15 22:04:28,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 22:04:28,307 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 22:04:28,309 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 22:04:28,310 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 22:04:28,313 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 22:04:28,313 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:04:28" (1/1) ... [2023-12-15 22:04:28,314 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34fd2873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:28, skipping insertion in model container [2023-12-15 22:04:28,314 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:04:28" (1/1) ... [2023-12-15 22:04:28,331 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 22:04:28,420 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/loopv3.c[456,469] [2023-12-15 22:04:28,430 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 22:04:28,438 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 22:04:28,445 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/loopv3.c[456,469] [2023-12-15 22:04:28,447 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 22:04:28,456 INFO L206 MainTranslator]: Completed translation [2023-12-15 22:04:28,458 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:28 WrapperNode [2023-12-15 22:04:28,458 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 22:04:28,459 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 22:04:28,459 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 22:04:28,459 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 22:04:28,463 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:28" (1/1) ... [2023-12-15 22:04:28,469 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:28" (1/1) ... [2023-12-15 22:04:28,487 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 35 [2023-12-15 22:04:28,487 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 22:04:28,488 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 22:04:28,488 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 22:04:28,488 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 22:04:28,494 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:28" (1/1) ... [2023-12-15 22:04:28,494 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:28" (1/1) ... [2023-12-15 22:04:28,495 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:28" (1/1) ... [2023-12-15 22:04:28,504 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]. [2023-12-15 22:04:28,504 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:28" (1/1) ... [2023-12-15 22:04:28,504 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:28" (1/1) ... [2023-12-15 22:04:28,506 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:28" (1/1) ... [2023-12-15 22:04:28,508 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:28" (1/1) ... [2023-12-15 22:04:28,508 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:28" (1/1) ... [2023-12-15 22:04:28,509 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:28" (1/1) ... [2023-12-15 22:04:28,514 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 22:04:28,515 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 22:04:28,515 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 22:04:28,515 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 22:04:28,516 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:28" (1/1) ... [2023-12-15 22:04:28,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 22:04:28,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:04:28,543 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) [2023-12-15 22:04:28,553 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 [2023-12-15 22:04:28,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 22:04:28,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 22:04:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 22:04:28,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 22:04:28,606 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 22:04:28,607 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 22:04:28,737 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 22:04:28,750 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 22:04:28,751 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-15 22:04:28,751 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:04:28 BoogieIcfgContainer [2023-12-15 22:04:28,751 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 22:04:28,753 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 22:04:28,753 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 22:04:28,755 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 22:04:28,756 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:04:28" (1/3) ... [2023-12-15 22:04:28,756 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b1abba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:04:28, skipping insertion in model container [2023-12-15 22:04:28,756 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:28" (2/3) ... [2023-12-15 22:04:28,756 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b1abba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:04:28, skipping insertion in model container [2023-12-15 22:04:28,757 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:04:28" (3/3) ... [2023-12-15 22:04:28,757 INFO L112 eAbstractionObserver]: Analyzing ICFG loopv3.c [2023-12-15 22:04:28,769 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 22:04:28,769 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 22:04:28,819 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 22:04:28,825 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;@77f980ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 22:04:28,825 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 22:04:28,828 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 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) [2023-12-15 22:04:28,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-15 22:04:28,833 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:28,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-15 22:04:28,837 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:28,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:28,845 INFO L85 PathProgramCache]: Analyzing trace with hash 63386408, now seen corresponding path program 1 times [2023-12-15 22:04:28,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:28,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608856848] [2023-12-15 22:04:28,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:28,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:28,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:28,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608856848] [2023-12-15 22:04:28,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608856848] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 22:04:28,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 22:04:28,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 22:04:28,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305350027] [2023-12-15 22:04:28,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:04:28,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-15 22:04:28,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:28,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-15 22:04:28,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 22:04:28,997 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 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) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-12-15 22:04:29,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:29,015 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2023-12-15 22:04:29,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-15 22:04:29,017 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2023-12-15 22:04:29,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:29,022 INFO L225 Difference]: With dead ends: 15 [2023-12-15 22:04:29,022 INFO L226 Difference]: Without dead ends: 7 [2023-12-15 22:04:29,024 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 [2023-12-15 22:04:29,027 INFO L413 NwaCegarLoop]: 8 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, 8 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 [2023-12-15 22:04:29,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:04:29,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2023-12-15 22:04:29,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2023-12-15 22:04:29,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 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) [2023-12-15 22:04:29,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2023-12-15 22:04:29,047 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2023-12-15 22:04:29,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:29,048 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2023-12-15 22:04:29,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-12-15 22:04:29,048 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2023-12-15 22:04:29,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-15 22:04:29,048 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:29,048 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-15 22:04:29,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-15 22:04:29,049 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:29,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:29,049 INFO L85 PathProgramCache]: Analyzing trace with hash 63088498, now seen corresponding path program 1 times [2023-12-15 22:04:29,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:29,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120379024] [2023-12-15 22:04:29,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:29,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:29,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:29,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120379024] [2023-12-15 22:04:29,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120379024] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 22:04:29,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 22:04:29,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 22:04:29,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815420051] [2023-12-15 22:04:29,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:04:29,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 22:04:29,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:29,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 22:04:29,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 22:04:29,134 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-12-15 22:04:29,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:29,150 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2023-12-15 22:04:29,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 22:04:29,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2023-12-15 22:04:29,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:29,152 INFO L225 Difference]: With dead ends: 13 [2023-12-15 22:04:29,160 INFO L226 Difference]: Without dead ends: 9 [2023-12-15 22:04:29,161 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 [2023-12-15 22:04:29,163 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:04:29,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:04:29,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-12-15 22:04:29,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2023-12-15 22:04:29,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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) [2023-12-15 22:04:29,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2023-12-15 22:04:29,166 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2023-12-15 22:04:29,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:29,166 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2023-12-15 22:04:29,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-12-15 22:04:29,185 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2023-12-15 22:04:29,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-15 22:04:29,185 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:29,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:04:29,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-15 22:04:29,186 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:29,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:29,186 INFO L85 PathProgramCache]: Analyzing trace with hash 550694231, now seen corresponding path program 1 times [2023-12-15 22:04:29,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:29,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131323812] [2023-12-15 22:04:29,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:29,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:29,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:29,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:29,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131323812] [2023-12-15 22:04:29,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131323812] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:04:29,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197983277] [2023-12-15 22:04:29,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:29,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:29,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:04:29,305 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) [2023-12-15 22:04:29,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 22:04:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:29,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 22:04:29,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:04:29,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:29,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:04:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:29,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197983277] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:04:29,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:04:29,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-12-15 22:04:29,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792206214] [2023-12-15 22:04:29,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:04:29,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 22:04:29,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:29,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 22:04:29,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-12-15 22:04:29,407 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 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) [2023-12-15 22:04:29,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:29,441 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2023-12-15 22:04:29,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 22:04:29,443 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 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) Word has length 7 [2023-12-15 22:04:29,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:29,443 INFO L225 Difference]: With dead ends: 18 [2023-12-15 22:04:29,443 INFO L226 Difference]: Without dead ends: 14 [2023-12-15 22:04:29,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-12-15 22:04:29,444 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:04:29,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:04:29,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-12-15 22:04:29,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-12-15 22:04:29,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) [2023-12-15 22:04:29,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2023-12-15 22:04:29,447 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 7 [2023-12-15 22:04:29,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:29,447 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2023-12-15 22:04:29,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 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) [2023-12-15 22:04:29,447 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2023-12-15 22:04:29,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-15 22:04:29,447 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:29,447 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-12-15 22:04:29,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-15 22:04:29,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:29,648 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:29,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:29,649 INFO L85 PathProgramCache]: Analyzing trace with hash -788486024, now seen corresponding path program 1 times [2023-12-15 22:04:29,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:29,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244535312] [2023-12-15 22:04:29,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:29,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:29,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:29,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244535312] [2023-12-15 22:04:29,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244535312] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:04:29,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420258518] [2023-12-15 22:04:29,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:29,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:29,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:04:29,706 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) [2023-12-15 22:04:29,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 22:04:29,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:29,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-15 22:04:29,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:04:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:29,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:04:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:29,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420258518] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:04:29,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:04:29,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-12-15 22:04:29,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040160105] [2023-12-15 22:04:29,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:04:29,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-15 22:04:29,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:29,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-15 22:04:29,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2023-12-15 22:04:29,873 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2023-12-15 22:04:29,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:29,926 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2023-12-15 22:04:29,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 22:04:29,926 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) Word has length 9 [2023-12-15 22:04:29,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:29,928 INFO L225 Difference]: With dead ends: 28 [2023-12-15 22:04:29,928 INFO L226 Difference]: Without dead ends: 24 [2023-12-15 22:04:29,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2023-12-15 22:04:29,930 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:04:29,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:04:29,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-15 22:04:29,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2023-12-15 22:04:29,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2023-12-15 22:04:29,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2023-12-15 22:04:29,934 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 9 [2023-12-15 22:04:29,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:29,934 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2023-12-15 22:04:29,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2023-12-15 22:04:29,934 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2023-12-15 22:04:29,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-15 22:04:29,934 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:29,934 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2023-12-15 22:04:29,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-15 22:04:30,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-15 22:04:30,135 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:30,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:30,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1746265072, now seen corresponding path program 2 times [2023-12-15 22:04:30,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:30,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896937756] [2023-12-15 22:04:30,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:30,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:30,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:30,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896937756] [2023-12-15 22:04:30,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896937756] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:04:30,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041867639] [2023-12-15 22:04:30,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 22:04:30,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:30,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:04:30,271 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) [2023-12-15 22:04:30,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 22:04:30,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 22:04:30,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:04:30,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-15 22:04:30,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:04:30,394 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:30,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:04:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:30,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041867639] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:04:30,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:04:30,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-12-15 22:04:30,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874141618] [2023-12-15 22:04:30,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:04:30,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-15 22:04:30,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:30,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-15 22:04:30,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=268, Unknown=0, NotChecked=0, Total=506 [2023-12-15 22:04:30,484 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 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) [2023-12-15 22:04:30,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:30,549 INFO L93 Difference]: Finished difference Result 60 states and 90 transitions. [2023-12-15 22:04:30,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-15 22:04:30,549 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 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 [2023-12-15 22:04:30,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:30,550 INFO L225 Difference]: With dead ends: 60 [2023-12-15 22:04:30,550 INFO L226 Difference]: Without dead ends: 56 [2023-12-15 22:04:30,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=238, Invalid=268, Unknown=0, NotChecked=0, Total=506 [2023-12-15 22:04:30,551 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:04:30,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:04:30,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-12-15 22:04:30,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 34. [2023-12-15 22:04:30,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 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) [2023-12-15 22:04:30,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2023-12-15 22:04:30,557 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 17 [2023-12-15 22:04:30,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:30,557 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2023-12-15 22:04:30,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 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) [2023-12-15 22:04:30,557 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2023-12-15 22:04:30,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-15 22:04:30,558 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:30,558 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1] [2023-12-15 22:04:30,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-15 22:04:30,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:30,762 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:30,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:30,763 INFO L85 PathProgramCache]: Analyzing trace with hash 174531214, now seen corresponding path program 1 times [2023-12-15 22:04:30,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:30,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535592397] [2023-12-15 22:04:30,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:30,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:30,909 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:30,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:30,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535592397] [2023-12-15 22:04:30,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535592397] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:04:30,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72372090] [2023-12-15 22:04:30,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:30,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:30,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:04:30,924 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) [2023-12-15 22:04:30,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-15 22:04:30,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:30,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-15 22:04:30,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:04:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:31,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:04:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:31,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72372090] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:04:31,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:04:31,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-12-15 22:04:31,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278484967] [2023-12-15 22:04:31,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:04:31,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-15 22:04:31,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:31,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-15 22:04:31,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=434, Unknown=0, NotChecked=0, Total=812 [2023-12-15 22:04:31,203 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 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) [2023-12-15 22:04:31,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:31,277 INFO L93 Difference]: Finished difference Result 118 states and 178 transitions. [2023-12-15 22:04:31,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-15 22:04:31,277 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 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 [2023-12-15 22:04:31,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:31,278 INFO L225 Difference]: With dead ends: 118 [2023-12-15 22:04:31,278 INFO L226 Difference]: Without dead ends: 114 [2023-12-15 22:04:31,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=434, Unknown=0, NotChecked=0, Total=812 [2023-12-15 22:04:31,279 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:04:31,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 14 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:04:31,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-12-15 22:04:31,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 42. [2023-12-15 22:04:31,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 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) [2023-12-15 22:04:31,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2023-12-15 22:04:31,296 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 21 [2023-12-15 22:04:31,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:31,296 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2023-12-15 22:04:31,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 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) [2023-12-15 22:04:31,296 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2023-12-15 22:04:31,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-15 22:04:31,296 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:31,296 INFO L195 NwaCegarLoop]: trace histogram [14, 10, 4, 1, 1, 1, 1, 1] [2023-12-15 22:04:31,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-15 22:04:31,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:31,501 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:31,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:31,502 INFO L85 PathProgramCache]: Analyzing trace with hash -114266064, now seen corresponding path program 2 times [2023-12-15 22:04:31,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:31,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966813216] [2023-12-15 22:04:31,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:31,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:31,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:31,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966813216] [2023-12-15 22:04:31,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966813216] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:04:31,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863507532] [2023-12-15 22:04:31,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 22:04:31,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:31,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:04:31,772 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) [2023-12-15 22:04:31,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-15 22:04:31,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 22:04:31,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:04:31,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-15 22:04:31,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:04:32,087 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:32,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:04:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:32,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863507532] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:04:32,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:04:32,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2023-12-15 22:04:32,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917966368] [2023-12-15 22:04:32,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:04:32,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-15 22:04:32,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:32,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-15 22:04:32,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=1172, Unknown=0, NotChecked=0, Total=2162 [2023-12-15 22:04:32,411 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 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) [2023-12-15 22:04:32,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:32,555 INFO L93 Difference]: Finished difference Result 264 states and 400 transitions. [2023-12-15 22:04:32,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-15 22:04:32,556 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 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 33 [2023-12-15 22:04:32,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:32,557 INFO L225 Difference]: With dead ends: 264 [2023-12-15 22:04:32,557 INFO L226 Difference]: Without dead ends: 260 [2023-12-15 22:04:32,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=1172, Unknown=0, NotChecked=0, Total=2162 [2023-12-15 22:04:32,559 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:04:32,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:04:32,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-12-15 22:04:32,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 66. [2023-12-15 22:04:32,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.476923076923077) internal successors, (96), 65 states have internal predecessors, (96), 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) [2023-12-15 22:04:32,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 96 transitions. [2023-12-15 22:04:32,574 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 96 transitions. Word has length 33 [2023-12-15 22:04:32,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:32,574 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 96 transitions. [2023-12-15 22:04:32,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 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) [2023-12-15 22:04:32,574 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 96 transitions. [2023-12-15 22:04:32,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-15 22:04:32,575 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:32,575 INFO L195 NwaCegarLoop]: trace histogram [18, 12, 6, 1, 1, 1, 1, 1] [2023-12-15 22:04:32,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-15 22:04:32,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:32,780 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:32,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:32,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1105070284, now seen corresponding path program 3 times [2023-12-15 22:04:32,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:32,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699177865] [2023-12-15 22:04:32,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:32,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:33,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:33,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699177865] [2023-12-15 22:04:33,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699177865] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:04:33,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751085638] [2023-12-15 22:04:33,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 22:04:33,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:33,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:04:33,129 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) [2023-12-15 22:04:33,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-15 22:04:33,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2023-12-15 22:04:33,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:04:33,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-15 22:04:33,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:04:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:33,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:04:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:34,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751085638] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:04:34,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:04:34,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2023-12-15 22:04:34,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438098826] [2023-12-15 22:04:34,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:04:34,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-12-15 22:04:34,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:34,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-12-15 22:04:34,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1558, Invalid=1864, Unknown=0, NotChecked=0, Total=3422 [2023-12-15 22:04:34,022 INFO L87 Difference]: Start difference. First operand 66 states and 96 transitions. Second operand has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 58 states have internal predecessors, (117), 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) [2023-12-15 22:04:34,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:34,217 INFO L93 Difference]: Finished difference Result 508 states and 768 transitions. [2023-12-15 22:04:34,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-15 22:04:34,217 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 58 states have internal predecessors, (117), 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 [2023-12-15 22:04:34,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:34,219 INFO L225 Difference]: With dead ends: 508 [2023-12-15 22:04:34,219 INFO L226 Difference]: Without dead ends: 504 [2023-12-15 22:04:34,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1558, Invalid=1864, Unknown=0, NotChecked=0, Total=3422 [2023-12-15 22:04:34,221 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:04:34,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 26 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:04:34,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2023-12-15 22:04:34,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 82. [2023-12-15 22:04:34,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.4814814814814814) internal successors, (120), 81 states have internal predecessors, (120), 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) [2023-12-15 22:04:34,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 120 transitions. [2023-12-15 22:04:34,255 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 120 transitions. Word has length 41 [2023-12-15 22:04:34,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:34,255 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 120 transitions. [2023-12-15 22:04:34,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 58 states have internal predecessors, (117), 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) [2023-12-15 22:04:34,256 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 120 transitions. [2023-12-15 22:04:34,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-15 22:04:34,260 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:34,260 INFO L195 NwaCegarLoop]: trace histogram [30, 22, 8, 1, 1, 1, 1, 1] [2023-12-15 22:04:34,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-15 22:04:34,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:34,465 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:34,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:34,465 INFO L85 PathProgramCache]: Analyzing trace with hash -787271048, now seen corresponding path program 4 times [2023-12-15 22:04:34,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:34,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474196338] [2023-12-15 22:04:34,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:34,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:35,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:35,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474196338] [2023-12-15 22:04:35,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474196338] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:04:35,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104610570] [2023-12-15 22:04:35,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 22:04:35,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:35,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:04:35,140 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) [2023-12-15 22:04:35,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-15 22:04:35,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 22:04:35,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:04:35,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-15 22:04:35,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:04:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:35,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:04:36,842 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:36,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104610570] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:04:36,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:04:36,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 94 [2023-12-15 22:04:36,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293971079] [2023-12-15 22:04:36,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:04:36,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2023-12-15 22:04:36,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:36,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2023-12-15 22:04:36,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4030, Invalid=4900, Unknown=0, NotChecked=0, Total=8930 [2023-12-15 22:04:36,846 INFO L87 Difference]: Start difference. First operand 82 states and 120 transitions. Second operand has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 94 states have internal predecessors, (189), 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) [2023-12-15 22:04:37,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:37,213 INFO L93 Difference]: Finished difference Result 1052 states and 1590 transitions. [2023-12-15 22:04:37,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-12-15 22:04:37,213 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 94 states have internal predecessors, (189), 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 65 [2023-12-15 22:04:37,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:37,216 INFO L225 Difference]: With dead ends: 1052 [2023-12-15 22:04:37,216 INFO L226 Difference]: Without dead ends: 1048 [2023-12-15 22:04:37,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3749 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4030, Invalid=4900, Unknown=0, NotChecked=0, Total=8930 [2023-12-15 22:04:37,219 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:04:37,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:04:37,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2023-12-15 22:04:37,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 130. [2023-12-15 22:04:37,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.4883720930232558) internal successors, (192), 129 states have internal predecessors, (192), 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) [2023-12-15 22:04:37,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 192 transitions. [2023-12-15 22:04:37,277 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 192 transitions. Word has length 65 [2023-12-15 22:04:37,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:37,277 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 192 transitions. [2023-12-15 22:04:37,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 94 states have internal predecessors, (189), 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) [2023-12-15 22:04:37,277 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 192 transitions. [2023-12-15 22:04:37,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-15 22:04:37,278 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:37,278 INFO L195 NwaCegarLoop]: trace histogram [36, 26, 10, 1, 1, 1, 1, 1] [2023-12-15 22:04:37,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-15 22:04:37,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:37,483 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:37,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:37,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1006131214, now seen corresponding path program 5 times [2023-12-15 22:04:37,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:37,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386338828] [2023-12-15 22:04:37,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:37,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:37,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:38,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:38,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386338828] [2023-12-15 22:04:38,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386338828] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:04:38,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723259713] [2023-12-15 22:04:38,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 22:04:38,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:38,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:04:38,334 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) [2023-12-15 22:04:38,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-15 22:04:38,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2023-12-15 22:04:38,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:04:38,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-15 22:04:38,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:04:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:39,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:04:40,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:40,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723259713] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:04:40,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:04:40,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 112 [2023-12-15 22:04:40,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905425955] [2023-12-15 22:04:40,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:04:40,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2023-12-15 22:04:40,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:40,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2023-12-15 22:04:40,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5698, Invalid=6958, Unknown=0, NotChecked=0, Total=12656 [2023-12-15 22:04:40,611 INFO L87 Difference]: Start difference. First operand 130 states and 192 transitions. Second operand has 113 states, 113 states have (on average 1.991150442477876) internal successors, (225), 112 states have internal predecessors, (225), 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) [2023-12-15 22:04:41,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:41,550 INFO L93 Difference]: Finished difference Result 2557 states and 3848 transitions. [2023-12-15 22:04:41,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-12-15 22:04:41,551 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.991150442477876) internal successors, (225), 112 states have internal predecessors, (225), 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 77 [2023-12-15 22:04:41,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:41,557 INFO L225 Difference]: With dead ends: 2557 [2023-12-15 22:04:41,557 INFO L226 Difference]: Without dead ends: 2553 [2023-12-15 22:04:41,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5363 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5698, Invalid=6958, Unknown=0, NotChecked=0, Total=12656 [2023-12-15 22:04:41,560 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 22:04:41,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 32 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 22:04:41,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2023-12-15 22:04:41,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 306. [2023-12-15 22:04:41,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.4950819672131148) internal successors, (456), 305 states have internal predecessors, (456), 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) [2023-12-15 22:04:41,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 456 transitions. [2023-12-15 22:04:41,722 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 456 transitions. Word has length 77 [2023-12-15 22:04:41,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:41,722 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 456 transitions. [2023-12-15 22:04:41,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.991150442477876) internal successors, (225), 112 states have internal predecessors, (225), 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) [2023-12-15 22:04:41,722 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 456 transitions. [2023-12-15 22:04:41,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-15 22:04:41,723 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:41,723 INFO L195 NwaCegarLoop]: trace histogram [54, 33, 21, 1, 1, 1, 1, 1] [2023-12-15 22:04:41,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-15 22:04:41,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-15 22:04:41,927 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:41,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:41,928 INFO L85 PathProgramCache]: Analyzing trace with hash -355170858, now seen corresponding path program 6 times [2023-12-15 22:04:41,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:41,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370776441] [2023-12-15 22:04:41,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:41,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:43,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:43,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370776441] [2023-12-15 22:04:43,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370776441] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:04:43,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767315685] [2023-12-15 22:04:43,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-15 22:04:43,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:43,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:04:43,485 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) [2023-12-15 22:04:43,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-15 22:04:43,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2023-12-15 22:04:43,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:04:43,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 57 conjunts are in the unsatisfiable core [2023-12-15 22:04:43,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:04:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:45,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:04:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:48,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767315685] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:04:48,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:04:48,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 166 [2023-12-15 22:04:48,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782569450] [2023-12-15 22:04:48,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:04:48,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2023-12-15 22:04:48,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:48,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2023-12-15 22:04:48,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12430, Invalid=15292, Unknown=0, NotChecked=0, Total=27722 [2023-12-15 22:04:48,319 INFO L87 Difference]: Start difference. First operand 306 states and 456 transitions. Second operand has 167 states, 167 states have (on average 1.9940119760479043) internal successors, (333), 166 states have internal predecessors, (333), 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) [2023-12-15 22:04:51,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:51,706 INFO L93 Difference]: Finished difference Result 5260 states and 7912 transitions. [2023-12-15 22:04:51,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-12-15 22:04:51,706 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 1.9940119760479043) internal successors, (333), 166 states have internal predecessors, (333), 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 113 [2023-12-15 22:04:51,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:51,719 INFO L225 Difference]: With dead ends: 5260 [2023-12-15 22:04:51,719 INFO L226 Difference]: Without dead ends: 5256 [2023-12-15 22:04:51,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11933 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=12430, Invalid=15292, Unknown=0, NotChecked=0, Total=27722 [2023-12-15 22:04:51,722 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 22:04:51,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 20 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 22:04:51,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5256 states. [2023-12-15 22:04:52,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5256 to 226. [2023-12-15 22:04:52,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.4933333333333334) internal successors, (336), 225 states have internal predecessors, (336), 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) [2023-12-15 22:04:52,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 336 transitions. [2023-12-15 22:04:52,094 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 336 transitions. Word has length 113 [2023-12-15 22:04:52,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:52,094 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 336 transitions. [2023-12-15 22:04:52,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 1.9940119760479043) internal successors, (333), 166 states have internal predecessors, (333), 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) [2023-12-15 22:04:52,095 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 336 transitions. [2023-12-15 22:04:52,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-12-15 22:04:52,095 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:52,095 INFO L195 NwaCegarLoop]: trace histogram [70, 40, 30, 1, 1, 1, 1, 1] [2023-12-15 22:04:52,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-15 22:04:52,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:52,300 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:52,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:52,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1202445568, now seen corresponding path program 7 times [2023-12-15 22:04:52,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:52,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413797328] [2023-12-15 22:04:52,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:52,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:54,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:54,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413797328] [2023-12-15 22:04:54,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413797328] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:04:54,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628963332] [2023-12-15 22:04:54,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-15 22:04:54,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:54,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:04:54,784 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) [2023-12-15 22:04:54,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-15 22:04:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:54,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-15 22:04:54,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:04:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:57,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:05:02,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:05:02,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628963332] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:05:02,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:05:02,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 214 [2023-12-15 22:05:02,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806374633] [2023-12-15 22:05:02,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:05:02,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 215 states [2023-12-15 22:05:02,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:05:02,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 215 interpolants. [2023-12-15 22:05:02,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20590, Invalid=25420, Unknown=0, NotChecked=0, Total=46010 [2023-12-15 22:05:02,486 INFO L87 Difference]: Start difference. First operand 226 states and 336 transitions. Second operand has 215 states, 215 states have (on average 1.9953488372093022) internal successors, (429), 214 states have internal predecessors, (429), 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) [2023-12-15 22:05:13,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:05:13,528 INFO L93 Difference]: Finished difference Result 8261 states and 12421 transitions. [2023-12-15 22:05:13,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2023-12-15 22:05:13,528 INFO L78 Accepts]: Start accepts. Automaton has has 215 states, 215 states have (on average 1.9953488372093022) internal successors, (429), 214 states have internal predecessors, (429), 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 145 [2023-12-15 22:05:13,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:05:13,546 INFO L225 Difference]: With dead ends: 8261 [2023-12-15 22:05:13,546 INFO L226 Difference]: Without dead ends: 8257 [2023-12-15 22:05:13,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19949 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=20590, Invalid=25420, Unknown=0, NotChecked=0, Total=46010 [2023-12-15 22:05:13,551 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 22:05:13,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 22:05:13,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8257 states. [2023-12-15 22:05:15,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8257 to 566. [2023-12-15 22:05:15,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 1.497345132743363) internal successors, (846), 565 states have internal predecessors, (846), 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) [2023-12-15 22:05:15,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 846 transitions. [2023-12-15 22:05:15,097 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 846 transitions. Word has length 145 [2023-12-15 22:05:15,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:05:15,098 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 846 transitions. [2023-12-15 22:05:15,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 215 states, 215 states have (on average 1.9953488372093022) internal successors, (429), 214 states have internal predecessors, (429), 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) [2023-12-15 22:05:15,098 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 846 transitions. [2023-12-15 22:05:15,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-12-15 22:05:15,100 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:05:15,101 INFO L195 NwaCegarLoop]: trace histogram [82, 61, 21, 1, 1, 1, 1, 1] [2023-12-15 22:05:15,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-15 22:05:15,304 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,SelfDestructingSolverStorable11 [2023-12-15 22:05:15,305 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:05:15,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:05:15,305 INFO L85 PathProgramCache]: Analyzing trace with hash -509743726, now seen corresponding path program 8 times [2023-12-15 22:05:15,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:05:15,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767512664] [2023-12-15 22:05:15,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:05:15,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:05:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:05:18,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:05:18,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:05:18,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767512664] [2023-12-15 22:05:18,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767512664] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:05:18,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413791292] [2023-12-15 22:05:18,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 22:05:18,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:05:18,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:05:18,020 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) [2023-12-15 22:05:18,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-15 22:05:18,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 22:05:18,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:05:18,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 85 conjunts are in the unsatisfiable core [2023-12-15 22:05:18,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:05:21,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:05:21,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:05:28,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:05:28,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413791292] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:05:28,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:05:28,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84, 84] total 250 [2023-12-15 22:05:28,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705536179] [2023-12-15 22:05:28,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:05:28,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 251 states [2023-12-15 22:05:28,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:05:28,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 251 interpolants. [2023-12-15 22:05:28,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28054, Invalid=34696, Unknown=0, NotChecked=0, Total=62750 [2023-12-15 22:05:28,651 INFO L87 Difference]: Start difference. First operand 566 states and 846 transitions. Second operand has 251 states, 251 states have (on average 1.99601593625498) internal successors, (501), 250 states have internal predecessors, (501), 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) Received shutdown request... [2023-12-15 22:05:41,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-15 22:05:41,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27305 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=28054, Invalid=34696, Unknown=0, NotChecked=0, Total=62750 [2023-12-15 22:05:41,872 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:05:41,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:05:41,873 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 22:05:41,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-15 22:05:41,909 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 [2023-12-15 22:05:41,909 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 22:05:42,078 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,SelfDestructingSolverStorable12 [2023-12-15 22:05:42,079 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (566states) and FLOYD_HOARE automaton (currently 46 states, 251 states before enhancement),while ReachableStatesComputation was computing reachable states (2298 states constructed, input type IntersectNwa). [2023-12-15 22:05:42,082 INFO L445 BasicCegarLoop]: Path program histogram: [8, 2, 1, 1, 1] [2023-12-15 22:05:42,084 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 22:05:42,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 10:05:42 BoogieIcfgContainer [2023-12-15 22:05:42,085 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 22:05:42,085 INFO L158 Benchmark]: Toolchain (without parser) took 73778.35ms. Allocated memory was 331.4MB in the beginning and 1.1GB in the end (delta: 731.9MB). Free memory was 279.7MB in the beginning and 717.6MB in the end (delta: -438.0MB). Peak memory consumption was 667.1MB. Max. memory is 8.0GB. [2023-12-15 22:05:42,086 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 179.3MB. Free memory is still 131.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 22:05:42,086 INFO L158 Benchmark]: CACSL2BoogieTranslator took 149.01ms. Allocated memory is still 331.4MB. Free memory was 279.3MB in the beginning and 268.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-15 22:05:42,086 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.37ms. Allocated memory is still 331.4MB. Free memory was 268.8MB in the beginning and 267.5MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-15 22:05:42,086 INFO L158 Benchmark]: Boogie Preprocessor took 27.09ms. Allocated memory is still 331.4MB. Free memory was 267.5MB in the beginning and 265.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 22:05:42,086 INFO L158 Benchmark]: RCFGBuilder took 236.12ms. Allocated memory is still 331.4MB. Free memory was 265.7MB in the beginning and 255.5MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-15 22:05:42,086 INFO L158 Benchmark]: TraceAbstraction took 73332.57ms. Allocated memory was 331.4MB in the beginning and 1.1GB in the end (delta: 731.9MB). Free memory was 254.9MB in the beginning and 717.6MB in the end (delta: -462.7MB). Peak memory consumption was 642.9MB. Max. memory is 8.0GB. [2023-12-15 22:05:42,087 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 179.3MB. Free memory is still 131.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 149.01ms. Allocated memory is still 331.4MB. Free memory was 279.3MB in the beginning and 268.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 28.37ms. Allocated memory is still 331.4MB. Free memory was 268.8MB in the beginning and 267.5MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.09ms. Allocated memory is still 331.4MB. Free memory was 267.5MB in the beginning and 265.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 236.12ms. Allocated memory is still 331.4MB. Free memory was 265.7MB in the beginning and 255.5MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 73332.57ms. Allocated memory was 331.4MB in the beginning and 1.1GB in the end (delta: 731.9MB). Free memory was 254.9MB in the beginning and 717.6MB in the end (delta: -462.7MB). Peak memory consumption was 642.9MB. 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: 14]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 14). Cancelled while NwaCegarLoop was constructing difference of abstraction (566states) and FLOYD_HOARE automaton (currently 46 states, 251 states before enhancement),while ReachableStatesComputation was computing reachable states (2298 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 73.3s, OverallIterations: 13, TraceHistogramMax: 82, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 29.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 28 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 28 mSDsluCounter, 176 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 124 mSDsCounter, 623 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2124 IncrementalHoareTripleChecker+Invalid, 2747 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 623 mSolverCounterUnsat, 52 mSDtfsCounter, 2124 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1720 GetRequests, 723 SyntacticMatches, 0 SemanticMatches, 997 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71038 ImplicationChecksByTransitivity, 32.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=566occurred in iteration=12, InterpolantAutomatonStates: 523, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 16603 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 37.9s InterpolantComputationTime, 1404 NumberOfCodeBlocks, 1404 NumberOfCodeBlocksAsserted, 136 NumberOfCheckSat, 2066 ConstructedInterpolants, 0 QuantifiedInterpolants, 11236 SizeOfPredicates, 22 NumberOfNonLiveVariables, 2474 ConjunctsInSsa, 354 ConjunctsInUnsatCore, 35 InterpolantComputations, 2 PerfectInterpolantSequences, 0/52083 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