/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/array-crafted/zero_sum_m5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 19:43:10,806 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 19:43:10,854 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-18 19:43:10,857 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 19:43:10,857 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 19:43:10,879 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 19:43:10,880 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 19:43:10,880 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 19:43:10,880 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 19:43:10,881 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 19:43:10,881 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 19:43:10,881 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 19:43:10,881 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 19:43:10,882 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 19:43:10,882 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 19:43:10,882 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 19:43:10,882 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 19:43:10,883 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 19:43:10,883 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 19:43:10,883 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 19:43:10,883 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 19:43:10,887 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 19:43:10,887 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 19:43:10,887 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 19:43:10,887 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 19:43:10,887 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 19:43:10,888 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 19:43:10,888 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 19:43:10,888 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 19:43:10,888 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 19:43:10,889 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 19:43:10,889 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 19:43:10,889 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 19:43:10,889 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 19:43:10,889 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 19:43:10,890 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 19:43:10,890 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 19:43:10,890 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 19:43:10,890 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 19:43:10,890 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 19:43:10,891 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 19:43:10,891 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 19:43:10,891 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 19:43:10,892 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 19:43:11,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 19:43:11,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 19:43:11,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 19:43:11,100 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 19:43:11,100 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 19:43:11,101 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m5.c [2023-12-18 19:43:12,072 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 19:43:12,215 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 19:43:12,215 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m5.c [2023-12-18 19:43:12,220 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ceb092099/d610d67435f7490dbb57672042ebe353/FLAG2a32ed436 [2023-12-18 19:43:12,240 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ceb092099/d610d67435f7490dbb57672042ebe353 [2023-12-18 19:43:12,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 19:43:12,243 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 19:43:12,244 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 19:43:12,244 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 19:43:12,247 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 19:43:12,248 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:43:12" (1/1) ... [2023-12-18 19:43:12,248 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@161e1f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:43:12, skipping insertion in model container [2023-12-18 19:43:12,248 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:43:12" (1/1) ... [2023-12-18 19:43:12,262 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 19:43:12,382 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m5.c[402,415] [2023-12-18 19:43:12,399 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 19:43:12,405 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 19:43:12,412 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m5.c[402,415] [2023-12-18 19:43:12,420 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 19:43:12,429 INFO L206 MainTranslator]: Completed translation [2023-12-18 19:43:12,430 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:43:12 WrapperNode [2023-12-18 19:43:12,430 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 19:43:12,430 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 19:43:12,431 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 19:43:12,431 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 19:43:12,435 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:43:12" (1/1) ... [2023-12-18 19:43:12,440 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:43:12" (1/1) ... [2023-12-18 19:43:12,457 INFO L138 Inliner]: procedures = 15, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 152 [2023-12-18 19:43:12,457 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 19:43:12,458 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 19:43:12,458 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 19:43:12,458 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 19:43:12,465 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:43:12" (1/1) ... [2023-12-18 19:43:12,465 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:43:12" (1/1) ... [2023-12-18 19:43:12,467 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:43:12" (1/1) ... [2023-12-18 19:43:12,480 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-12-18 19:43:12,480 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:43:12" (1/1) ... [2023-12-18 19:43:12,480 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:43:12" (1/1) ... [2023-12-18 19:43:12,485 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:43:12" (1/1) ... [2023-12-18 19:43:12,491 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:43:12" (1/1) ... [2023-12-18 19:43:12,492 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:43:12" (1/1) ... [2023-12-18 19:43:12,493 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:43:12" (1/1) ... [2023-12-18 19:43:12,494 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 19:43:12,494 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 19:43:12,495 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 19:43:12,495 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 19:43:12,495 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:43:12" (1/1) ... [2023-12-18 19:43:12,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 19:43:12,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:43:12,517 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) [2023-12-18 19:43:12,532 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 [2023-12-18 19:43:12,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 19:43:12,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 19:43:12,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 19:43:12,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 19:43:12,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 19:43:12,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 19:43:12,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 19:43:12,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 19:43:12,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 19:43:12,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 19:43:12,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 19:43:12,600 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 19:43:12,601 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 19:43:12,753 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 19:43:12,796 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 19:43:12,796 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-12-18 19:43:12,796 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:43:12 BoogieIcfgContainer [2023-12-18 19:43:12,797 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 19:43:12,806 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 19:43:12,806 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 19:43:12,809 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 19:43:12,809 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:43:12" (1/3) ... [2023-12-18 19:43:12,809 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57652378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:43:12, skipping insertion in model container [2023-12-18 19:43:12,809 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:43:12" (2/3) ... [2023-12-18 19:43:12,810 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57652378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:43:12, skipping insertion in model container [2023-12-18 19:43:12,810 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:43:12" (3/3) ... [2023-12-18 19:43:12,810 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_m5.c [2023-12-18 19:43:12,822 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 19:43:12,823 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 19:43:12,852 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 19:43:12,857 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;@743b1d57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 19:43:12,857 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 19:43:12,861 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:12,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-18 19:43:12,865 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:43:12,865 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:43:12,877 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:43:12,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:43:12,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1439288402, now seen corresponding path program 1 times [2023-12-18 19:43:12,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:43:12,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499172149] [2023-12-18 19:43:12,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:43:12,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:43:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:43:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:43:13,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:43:13,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499172149] [2023-12-18 19:43:13,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499172149] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 19:43:13,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 19:43:13,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 19:43:13,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003591675] [2023-12-18 19:43:13,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 19:43:13,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-18 19:43:13,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:43:13,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-18 19:43:13,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 19:43:13,051 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 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 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:13,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:43:13,103 INFO L93 Difference]: Finished difference Result 57 states and 100 transitions. [2023-12-18 19:43:13,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 19:43:13,105 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-18 19:43:13,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:43:13,110 INFO L225 Difference]: With dead ends: 57 [2023-12-18 19:43:13,110 INFO L226 Difference]: Without dead ends: 27 [2023-12-18 19:43:13,112 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 [2023-12-18 19:43:13,116 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:43:13,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:43:13,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-18 19:43:13,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-12-18 19:43:13,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:13,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2023-12-18 19:43:13,141 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 26 [2023-12-18 19:43:13,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:43:13,142 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2023-12-18 19:43:13,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:13,142 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2023-12-18 19:43:13,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-18 19:43:13,142 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:43:13,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:43:13,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 19:43:13,143 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:43:13,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:43:13,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1795376710, now seen corresponding path program 1 times [2023-12-18 19:43:13,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:43:13,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121442929] [2023-12-18 19:43:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:43:13,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:43:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:43:13,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:43:13,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:43:13,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121442929] [2023-12-18 19:43:13,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121442929] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 19:43:13,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 19:43:13,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-18 19:43:13,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797446259] [2023-12-18 19:43:13,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 19:43:13,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 19:43:13,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:43:13,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 19:43:13,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 19:43:13,267 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:13,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:43:13,319 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2023-12-18 19:43:13,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 19:43:13,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-18 19:43:13,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:43:13,320 INFO L225 Difference]: With dead ends: 52 [2023-12-18 19:43:13,320 INFO L226 Difference]: Without dead ends: 28 [2023-12-18 19:43:13,320 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 [2023-12-18 19:43:13,321 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:43:13,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:43:13,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-18 19:43:13,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-12-18 19:43:13,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:13,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2023-12-18 19:43:13,325 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 26 [2023-12-18 19:43:13,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:43:13,325 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2023-12-18 19:43:13,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:13,326 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2023-12-18 19:43:13,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-18 19:43:13,326 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:43:13,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:43:13,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-18 19:43:13,326 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:43:13,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:43:13,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1649880805, now seen corresponding path program 1 times [2023-12-18 19:43:13,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:43:13,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260809185] [2023-12-18 19:43:13,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:43:13,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:43:13,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:43:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 19:43:13,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:43:13,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260809185] [2023-12-18 19:43:13,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260809185] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 19:43:13,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 19:43:13,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 19:43:13,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861264337] [2023-12-18 19:43:13,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 19:43:13,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 19:43:13,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:43:13,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 19:43:13,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-18 19:43:13,424 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:13,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:43:13,507 INFO L93 Difference]: Finished difference Result 60 states and 88 transitions. [2023-12-18 19:43:13,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 19:43:13,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-18 19:43:13,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:43:13,509 INFO L225 Difference]: With dead ends: 60 [2023-12-18 19:43:13,509 INFO L226 Difference]: Without dead ends: 38 [2023-12-18 19:43:13,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-18 19:43:13,511 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:43:13,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 17 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:43:13,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-18 19:43:13,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-12-18 19:43:13,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 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) [2023-12-18 19:43:13,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2023-12-18 19:43:13,517 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 27 [2023-12-18 19:43:13,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:43:13,517 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2023-12-18 19:43:13,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:13,517 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2023-12-18 19:43:13,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-18 19:43:13,518 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:43:13,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:43:13,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-18 19:43:13,518 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:43:13,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:43:13,519 INFO L85 PathProgramCache]: Analyzing trace with hash -903484266, now seen corresponding path program 1 times [2023-12-18 19:43:13,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:43:13,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062244643] [2023-12-18 19:43:13,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:43:13,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:43:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:43:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 19:43:13,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:43:13,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062244643] [2023-12-18 19:43:13,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062244643] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:43:13,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687318454] [2023-12-18 19:43:13,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:43:13,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:43:13,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:43:13,663 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) [2023-12-18 19:43:13,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-18 19:43:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:43:13,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 19:43:13,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:43:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 19:43:13,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:43:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 19:43:13,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687318454] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:43:13,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:43:13,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-18 19:43:13,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578436898] [2023-12-18 19:43:13,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:43:13,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-18 19:43:13,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:43:13,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-18 19:43:13,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-12-18 19:43:13,853 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:13,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:43:13,915 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2023-12-18 19:43:13,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 19:43:13,916 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-12-18 19:43:13,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:43:13,917 INFO L225 Difference]: With dead ends: 73 [2023-12-18 19:43:13,917 INFO L226 Difference]: Without dead ends: 39 [2023-12-18 19:43:13,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-12-18 19:43:13,924 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:43:13,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:43:13,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-18 19:43:13,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-12-18 19:43:13,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:13,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2023-12-18 19:43:13,935 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 37 [2023-12-18 19:43:13,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:43:13,936 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2023-12-18 19:43:13,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:13,936 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2023-12-18 19:43:13,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-18 19:43:13,938 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:43:13,938 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:43:13,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-18 19:43:14,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:43:14,140 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:43:14,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:43:14,141 INFO L85 PathProgramCache]: Analyzing trace with hash -702104937, now seen corresponding path program 2 times [2023-12-18 19:43:14,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:43:14,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390249822] [2023-12-18 19:43:14,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:43:14,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:43:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:43:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 19:43:14,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:43:14,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390249822] [2023-12-18 19:43:14,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390249822] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:43:14,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563850398] [2023-12-18 19:43:14,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:43:14,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:43:14,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:43:14,231 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) [2023-12-18 19:43:14,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-18 19:43:14,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:43:14,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:43:14,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 19:43:14,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:43:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 19:43:14,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:43:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 19:43:14,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563850398] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:43:14,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:43:14,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-12-18 19:43:14,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083167911] [2023-12-18 19:43:14,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:43:14,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-18 19:43:14,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:43:14,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-18 19:43:14,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-12-18 19:43:14,438 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:14,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:43:14,547 INFO L93 Difference]: Finished difference Result 80 states and 108 transitions. [2023-12-18 19:43:14,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-18 19:43:14,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-12-18 19:43:14,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:43:14,548 INFO L225 Difference]: With dead ends: 80 [2023-12-18 19:43:14,548 INFO L226 Difference]: Without dead ends: 49 [2023-12-18 19:43:14,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-12-18 19:43:14,549 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:43:14,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 23 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:43:14,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-12-18 19:43:14,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-12-18 19:43:14,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:14,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2023-12-18 19:43:14,559 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 38 [2023-12-18 19:43:14,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:43:14,559 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2023-12-18 19:43:14,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:14,560 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2023-12-18 19:43:14,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-18 19:43:14,561 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:43:14,562 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:43:14,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-18 19:43:14,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:43:14,770 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:43:14,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:43:14,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1904690106, now seen corresponding path program 3 times [2023-12-18 19:43:14,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:43:14,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054140824] [2023-12-18 19:43:14,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:43:14,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:43:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:43:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:43:17,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:43:17,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054140824] [2023-12-18 19:43:17,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054140824] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:43:17,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120922738] [2023-12-18 19:43:17,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:43:17,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:43:17,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:43:17,685 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) [2023-12-18 19:43:17,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-18 19:43:17,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-18 19:43:17,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:43:17,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 96 conjunts are in the unsatisfiable core [2023-12-18 19:43:17,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:43:17,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:43:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:43:18,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:43:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 19:43:19,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120922738] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:43:19,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:43:19,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 29] total 54 [2023-12-18 19:43:19,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367328657] [2023-12-18 19:43:19,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:43:19,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-12-18 19:43:19,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:43:19,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-12-18 19:43:19,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2714, Unknown=0, NotChecked=0, Total=2862 [2023-12-18 19:43:19,019 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 54 states, 54 states have (on average 1.7037037037037037) internal successors, (92), 54 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:19,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:43:19,834 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2023-12-18 19:43:19,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-18 19:43:19,834 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.7037037037037037) internal successors, (92), 54 states have internal predecessors, (92), 0 states have call successors, (0), 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 48 [2023-12-18 19:43:19,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:43:19,835 INFO L225 Difference]: With dead ends: 90 [2023-12-18 19:43:19,835 INFO L226 Difference]: Without dead ends: 86 [2023-12-18 19:43:19,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=154, Invalid=2816, Unknown=0, NotChecked=0, Total=2970 [2023-12-18 19:43:19,836 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 1727 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-18 19:43:19,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 347 Invalid, 1728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1727 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-18 19:43:19,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-18 19:43:19,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2023-12-18 19:43:19,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 83 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:19,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2023-12-18 19:43:19,845 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 48 [2023-12-18 19:43:19,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:43:19,845 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2023-12-18 19:43:19,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.7037037037037037) internal successors, (92), 54 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:19,845 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2023-12-18 19:43:19,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-18 19:43:19,846 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:43:19,846 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:43:19,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-18 19:43:20,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:43:20,051 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:43:20,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:43:20,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1358968049, now seen corresponding path program 4 times [2023-12-18 19:43:20,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:43:20,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220569326] [2023-12-18 19:43:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:43:20,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:43:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:43:20,125 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-18 19:43:20,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:43:20,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220569326] [2023-12-18 19:43:20,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220569326] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:43:20,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193296728] [2023-12-18 19:43:20,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:43:20,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:43:20,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:43:20,127 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) [2023-12-18 19:43:20,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-18 19:43:20,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:43:20,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:43:20,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 19:43:20,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:43:20,247 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-18 19:43:20,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:43:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-18 19:43:20,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193296728] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:43:20,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:43:20,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-12-18 19:43:20,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530290076] [2023-12-18 19:43:20,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:43:20,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-18 19:43:20,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:43:20,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-18 19:43:20,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-12-18 19:43:20,308 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:20,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:43:20,712 INFO L93 Difference]: Finished difference Result 177 states and 224 transitions. [2023-12-18 19:43:20,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-18 19:43:20,712 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-12-18 19:43:20,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:43:20,713 INFO L225 Difference]: With dead ends: 177 [2023-12-18 19:43:20,713 INFO L226 Difference]: Without dead ends: 96 [2023-12-18 19:43:20,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 84 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2023-12-18 19:43:20,714 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 113 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 19:43:20,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 85 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 19:43:20,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-12-18 19:43:20,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2023-12-18 19:43:20,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.2159090909090908) internal successors, (107), 88 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:20,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2023-12-18 19:43:20,730 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 49 [2023-12-18 19:43:20,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:43:20,730 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2023-12-18 19:43:20,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:20,731 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2023-12-18 19:43:20,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-18 19:43:20,732 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:43:20,733 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:43:20,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-18 19:43:20,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:43:20,938 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:43:20,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:43:20,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1405545912, now seen corresponding path program 5 times [2023-12-18 19:43:20,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:43:20,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669345098] [2023-12-18 19:43:20,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:43:20,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:43:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:43:21,027 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-18 19:43:21,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:43:21,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669345098] [2023-12-18 19:43:21,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669345098] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:43:21,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564323226] [2023-12-18 19:43:21,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:43:21,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:43:21,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:43:21,029 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) [2023-12-18 19:43:21,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-18 19:43:21,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-18 19:43:21,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:43:21,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 19:43:21,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:43:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-18 19:43:21,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:43:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-18 19:43:21,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564323226] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:43:21,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:43:21,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-12-18 19:43:21,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672468916] [2023-12-18 19:43:21,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:43:21,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-18 19:43:21,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:43:21,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-18 19:43:21,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-12-18 19:43:21,199 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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) [2023-12-18 19:43:21,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:43:21,320 INFO L93 Difference]: Finished difference Result 134 states and 160 transitions. [2023-12-18 19:43:21,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-18 19:43:21,321 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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) Word has length 50 [2023-12-18 19:43:21,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:43:21,321 INFO L225 Difference]: With dead ends: 134 [2023-12-18 19:43:21,321 INFO L226 Difference]: Without dead ends: 60 [2023-12-18 19:43:21,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 89 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-12-18 19:43:21,324 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:43:21,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 56 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:43:21,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-18 19:43:21,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-12-18 19:43:21,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:21,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2023-12-18 19:43:21,334 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 50 [2023-12-18 19:43:21,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:43:21,334 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2023-12-18 19:43:21,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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) [2023-12-18 19:43:21,334 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2023-12-18 19:43:21,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-18 19:43:21,337 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:43:21,337 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:43:21,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-18 19:43:21,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:43:21,543 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:43:21,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:43:21,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1880623638, now seen corresponding path program 6 times [2023-12-18 19:43:21,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:43:21,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033796951] [2023-12-18 19:43:21,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:43:21,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:43:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:43:25,608 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:43:25,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:43:25,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033796951] [2023-12-18 19:43:25,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033796951] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:43:25,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802800574] [2023-12-18 19:43:25,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 19:43:25,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:43:25,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:43:25,610 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) [2023-12-18 19:43:25,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-18 19:43:25,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-12-18 19:43:25,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:43:25,685 WARN L260 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 130 conjunts are in the unsatisfiable core [2023-12-18 19:43:25,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:43:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 19:43:27,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:43:29,774 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:43:29,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2023-12-18 19:43:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 19:43:29,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802800574] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:43:29,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:43:29,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 36, 39] total 108 [2023-12-18 19:43:29,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080330667] [2023-12-18 19:43:29,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:43:29,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2023-12-18 19:43:29,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:43:29,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2023-12-18 19:43:29,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=11207, Unknown=0, NotChecked=0, Total=11556 [2023-12-18 19:43:29,973 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 108 states, 108 states have (on average 1.4444444444444444) internal successors, (156), 108 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:39,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:43:39,523 INFO L93 Difference]: Finished difference Result 199 states and 238 transitions. [2023-12-18 19:43:39,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-12-18 19:43:39,523 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.4444444444444444) internal successors, (156), 108 states have internal predecessors, (156), 0 states have call successors, (0), 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 59 [2023-12-18 19:43:39,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:43:39,524 INFO L225 Difference]: With dead ends: 199 [2023-12-18 19:43:39,524 INFO L226 Difference]: Without dead ends: 193 [2023-12-18 19:43:39,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6147 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=1274, Invalid=26782, Unknown=0, NotChecked=0, Total=28056 [2023-12-18 19:43:39,529 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 341 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 8465 mSolverCounterSat, 842 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 9307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 842 IncrementalHoareTripleChecker+Valid, 8465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:43:39,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 595 Invalid, 9307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [842 Valid, 8465 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-12-18 19:43:39,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-12-18 19:43:39,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 110. [2023-12-18 19:43:39,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.2110091743119267) internal successors, (132), 109 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:39,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 132 transitions. [2023-12-18 19:43:39,570 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 132 transitions. Word has length 59 [2023-12-18 19:43:39,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:43:39,571 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 132 transitions. [2023-12-18 19:43:39,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.4444444444444444) internal successors, (156), 108 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:39,572 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 132 transitions. [2023-12-18 19:43:39,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-18 19:43:39,573 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:43:39,573 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:43:39,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-18 19:43:39,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:43:39,780 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:43:39,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:43:39,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1993316346, now seen corresponding path program 7 times [2023-12-18 19:43:39,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:43:39,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837133171] [2023-12-18 19:43:39,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:43:39,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:43:39,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:43:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-18 19:43:39,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:43:39,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837133171] [2023-12-18 19:43:39,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837133171] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:43:39,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021920373] [2023-12-18 19:43:39,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 19:43:39,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:43:39,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:43:39,885 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) [2023-12-18 19:43:39,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-18 19:43:39,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:43:39,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 19:43:39,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:43:40,043 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-18 19:43:40,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:43:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-18 19:43:40,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021920373] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:43:40,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:43:40,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-18 19:43:40,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095566619] [2023-12-18 19:43:40,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:43:40,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 19:43:40,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:43:40,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 19:43:40,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-12-18 19:43:40,125 INFO L87 Difference]: Start difference. First operand 110 states and 132 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:40,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:43:40,350 INFO L93 Difference]: Finished difference Result 223 states and 266 transitions. [2023-12-18 19:43:40,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 19:43:40,350 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 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 60 [2023-12-18 19:43:40,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:43:40,351 INFO L225 Difference]: With dead ends: 223 [2023-12-18 19:43:40,351 INFO L226 Difference]: Without dead ends: 84 [2023-12-18 19:43:40,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 107 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-12-18 19:43:40,352 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 53 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:43:40,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 80 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 19:43:40,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-18 19:43:40,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-12-18 19:43:40,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 83 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:40,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2023-12-18 19:43:40,371 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 60 [2023-12-18 19:43:40,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:43:40,371 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2023-12-18 19:43:40,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:40,371 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2023-12-18 19:43:40,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-18 19:43:40,372 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:43:40,372 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:43:40,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-18 19:43:40,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:43:40,577 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:43:40,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:43:40,578 INFO L85 PathProgramCache]: Analyzing trace with hash 667457753, now seen corresponding path program 8 times [2023-12-18 19:43:40,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:43:40,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362243212] [2023-12-18 19:43:40,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:43:40,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:43:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:43:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-18 19:43:40,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:43:40,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362243212] [2023-12-18 19:43:40,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362243212] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:43:40,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933810127] [2023-12-18 19:43:40,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:43:40,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:43:40,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:43:40,684 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) [2023-12-18 19:43:40,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-18 19:43:40,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:43:40,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:43:40,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 19:43:40,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:43:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-18 19:43:40,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:43:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-18 19:43:40,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933810127] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:43:40,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:43:40,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-18 19:43:40,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609210819] [2023-12-18 19:43:40,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:43:40,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 19:43:40,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:43:40,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 19:43:40,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-18 19:43:40,856 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:41,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:43:41,002 INFO L93 Difference]: Finished difference Result 143 states and 176 transitions. [2023-12-18 19:43:41,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 19:43:41,002 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 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 61 [2023-12-18 19:43:41,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:43:41,003 INFO L225 Difference]: With dead ends: 143 [2023-12-18 19:43:41,003 INFO L226 Difference]: Without dead ends: 71 [2023-12-18 19:43:41,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 108 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-12-18 19:43:41,004 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 72 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:43:41,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 56 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:43:41,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-18 19:43:41,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-12-18 19:43:41,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:41,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2023-12-18 19:43:41,024 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 61 [2023-12-18 19:43:41,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:43:41,025 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2023-12-18 19:43:41,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:41,025 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2023-12-18 19:43:41,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-18 19:43:41,025 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:43:41,025 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:43:41,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-18 19:43:41,230 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,SelfDestructingSolverStorable10 [2023-12-18 19:43:41,231 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:43:41,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:43:41,231 INFO L85 PathProgramCache]: Analyzing trace with hash 466932294, now seen corresponding path program 9 times [2023-12-18 19:43:41,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:43:41,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614942395] [2023-12-18 19:43:41,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:43:41,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:43:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:43:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 2 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:43:46,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:43:46,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614942395] [2023-12-18 19:43:46,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614942395] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:43:46,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155386358] [2023-12-18 19:43:46,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:43:46,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:43:46,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:43:46,359 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) [2023-12-18 19:43:46,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-18 19:43:46,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-18 19:43:46,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:43:46,449 WARN L260 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 193 conjunts are in the unsatisfiable core [2023-12-18 19:43:46,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:43:46,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-18 19:43:52,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:43:52,300 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:43:52,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-12-18 19:43:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 2 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 19:43:52,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:44:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 19:44:00,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155386358] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:44:00,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:44:00,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 67, 65] total 184 [2023-12-18 19:44:00,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430257410] [2023-12-18 19:44:00,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:44:00,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 184 states [2023-12-18 19:44:00,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:44:00,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2023-12-18 19:44:00,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1192, Invalid=32480, Unknown=0, NotChecked=0, Total=33672 [2023-12-18 19:44:00,996 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 184 states, 184 states have (on average 1.0869565217391304) internal successors, (200), 184 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:45:04,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:45:04,444 INFO L93 Difference]: Finished difference Result 381 states and 448 transitions. [2023-12-18 19:45:04,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2023-12-18 19:45:04,444 INFO L78 Accepts]: Start accepts. Automaton has has 184 states, 184 states have (on average 1.0869565217391304) internal successors, (200), 184 states have internal predecessors, (200), 0 states have call successors, (0), 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 70 [2023-12-18 19:45:04,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:45:04,446 INFO L225 Difference]: With dead ends: 381 [2023-12-18 19:45:04,446 INFO L226 Difference]: Without dead ends: 284 [2023-12-18 19:45:04,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 369 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33140 ImplicationChecksByTransitivity, 58.2s TimeCoverageRelationStatistics Valid=7474, Invalid=129796, Unknown=0, NotChecked=0, Total=137270 [2023-12-18 19:45:04,454 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1300 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 14399 mSolverCounterSat, 4061 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1300 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 18460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4061 IncrementalHoareTripleChecker+Valid, 14399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:45:04,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1300 Valid, 1088 Invalid, 18460 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4061 Valid, 14399 Invalid, 0 Unknown, 0 Unchecked, 20.1s Time] [2023-12-18 19:45:04,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2023-12-18 19:45:04,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 214. [2023-12-18 19:45:04,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.1455399061032865) internal successors, (244), 213 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:45:04,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 244 transitions. [2023-12-18 19:45:04,544 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 244 transitions. Word has length 70 [2023-12-18 19:45:04,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:45:04,544 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 244 transitions. [2023-12-18 19:45:04,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 184 states, 184 states have (on average 1.0869565217391304) internal successors, (200), 184 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:45:04,544 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 244 transitions. [2023-12-18 19:45:04,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-18 19:45:04,545 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:45:04,545 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:45:04,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-18 19:45:04,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:45:04,745 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:45:04,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:45:04,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1621157831, now seen corresponding path program 10 times [2023-12-18 19:45:04,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:45:04,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159461589] [2023-12-18 19:45:04,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:45:04,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:45:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:45:04,857 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 19:45:04,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:45:04,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159461589] [2023-12-18 19:45:04,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159461589] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:45:04,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083999365] [2023-12-18 19:45:04,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:45:04,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:45:04,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:45:04,874 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) [2023-12-18 19:45:04,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-18 19:45:04,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:45:04,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:45:04,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 19:45:04,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:45:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 19:45:05,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:45:05,215 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 19:45:05,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083999365] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:45:05,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:45:05,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-12-18 19:45:05,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892586820] [2023-12-18 19:45:05,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:45:05,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-18 19:45:05,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:45:05,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-18 19:45:05,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-12-18 19:45:05,217 INFO L87 Difference]: Start difference. First operand 214 states and 244 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:45:05,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:45:05,687 INFO L93 Difference]: Finished difference Result 362 states and 418 transitions. [2023-12-18 19:45:05,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-18 19:45:05,687 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-12-18 19:45:05,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:45:05,688 INFO L225 Difference]: With dead ends: 362 [2023-12-18 19:45:05,688 INFO L226 Difference]: Without dead ends: 124 [2023-12-18 19:45:05,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 122 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2023-12-18 19:45:05,689 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 100 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 19:45:05,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 66 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 19:45:05,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-18 19:45:05,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 105. [2023-12-18 19:45:05,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1442307692307692) internal successors, (119), 104 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:45:05,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2023-12-18 19:45:05,727 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 71 [2023-12-18 19:45:05,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:45:05,727 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2023-12-18 19:45:05,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:45:05,727 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2023-12-18 19:45:05,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-18 19:45:05,728 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:45:05,728 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:45:05,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-18 19:45:05,929 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,SelfDestructingSolverStorable12 [2023-12-18 19:45:05,930 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:45:05,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:45:05,930 INFO L85 PathProgramCache]: Analyzing trace with hash -855263067, now seen corresponding path program 11 times [2023-12-18 19:45:05,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:45:05,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179025000] [2023-12-18 19:45:05,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:45:05,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:45:05,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:45:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-12-18 19:45:06,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:45:06,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179025000] [2023-12-18 19:45:06,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179025000] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:45:06,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527748135] [2023-12-18 19:45:06,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:45:06,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:45:06,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:45:06,051 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) [2023-12-18 19:45:06,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-18 19:45:06,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-18 19:45:06,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:45:06,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 19:45:06,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:45:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-12-18 19:45:06,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:45:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-12-18 19:45:06,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527748135] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:45:06,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:45:06,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-12-18 19:45:06,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028387976] [2023-12-18 19:45:06,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:45:06,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-18 19:45:06,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:45:06,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-18 19:45:06,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-12-18 19:45:06,367 INFO L87 Difference]: Start difference. First operand 105 states and 119 transitions. Second operand has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:45:06,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:45:06,719 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2023-12-18 19:45:06,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-18 19:45:06,719 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 0 states have call successors, (0), 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 76 [2023-12-18 19:45:06,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:45:06,719 INFO L225 Difference]: With dead ends: 110 [2023-12-18 19:45:06,720 INFO L226 Difference]: Without dead ends: 82 [2023-12-18 19:45:06,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 136 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2023-12-18 19:45:06,720 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 19:45:06,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 77 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 19:45:06,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-18 19:45:06,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-12-18 19:45:06,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:45:06,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2023-12-18 19:45:06,753 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 76 [2023-12-18 19:45:06,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:45:06,753 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2023-12-18 19:45:06,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:45:06,753 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2023-12-18 19:45:06,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-18 19:45:06,753 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:45:06,753 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:45:06,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-18 19:45:06,959 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,SelfDestructingSolverStorable13 [2023-12-18 19:45:06,959 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:45:06,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:45:06,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1937881194, now seen corresponding path program 12 times [2023-12-18 19:45:06,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:45:06,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341255470] [2023-12-18 19:45:06,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:45:06,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:45:07,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:45:16,829 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 7 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:45:16,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:45:16,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341255470] [2023-12-18 19:45:16,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341255470] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:45:16,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312592635] [2023-12-18 19:45:16,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 19:45:16,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:45:16,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:45:16,830 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:45:16,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-18 19:45:16,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-18 19:45:16,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:45:16,932 WARN L260 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 234 conjunts are in the unsatisfiable core [2023-12-18 19:45:16,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:45:17,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-18 19:45:27,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:27,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:27,248 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-18 19:45:27,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:27,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:27,252 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-18 19:45:27,275 INFO L349 Elim1Store]: treesize reduction 18, result has 64.7 percent of original size [2023-12-18 19:45:27,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 46 treesize of output 43 [2023-12-18 19:45:27,543 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 2 proven. 162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 19:45:27,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:46:35,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 61 [2023-12-18 19:46:35,954 INFO L349 Elim1Store]: treesize reduction 24, result has 27.3 percent of original size [2023-12-18 19:46:35,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 438 treesize of output 278 [2023-12-18 19:46:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 19:46:35,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312592635] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:46:35,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:46:35,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 76, 73] total 211 [2023-12-18 19:46:35,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053650112] [2023-12-18 19:46:35,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:46:35,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 211 states [2023-12-18 19:46:35,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:46:35,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 211 interpolants. [2023-12-18 19:46:35,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1541, Invalid=42751, Unknown=18, NotChecked=0, Total=44310 [2023-12-18 19:46:35,980 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand has 211 states, 211 states have (on average 1.09478672985782) internal successors, (231), 211 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:48:22,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:48:22,637 INFO L93 Difference]: Finished difference Result 290 states and 331 transitions. [2023-12-18 19:48:22,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2023-12-18 19:48:22,637 INFO L78 Accepts]: Start accepts. Automaton has has 211 states, 211 states have (on average 1.09478672985782) internal successors, (231), 211 states have internal predecessors, (231), 0 states have call successors, (0), 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 81 [2023-12-18 19:48:22,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:48:22,638 INFO L225 Difference]: With dead ends: 290 [2023-12-18 19:48:22,638 INFO L226 Difference]: Without dead ends: 105 [2023-12-18 19:48:22,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19809 ImplicationChecksByTransitivity, 138.1s TimeCoverageRelationStatistics Valid=5098, Invalid=89434, Unknown=24, NotChecked=0, Total=94556 [2023-12-18 19:48:22,643 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1143 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 16104 mSolverCounterSat, 3357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 19461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3357 IncrementalHoareTripleChecker+Valid, 16104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:48:22,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1143 Valid, 722 Invalid, 19461 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3357 Valid, 16104 Invalid, 0 Unknown, 0 Unchecked, 48.1s Time] [2023-12-18 19:48:22,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-12-18 19:48:22,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2023-12-18 19:48:22,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.1414141414141414) internal successors, (113), 99 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:48:22,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2023-12-18 19:48:22,698 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 81 [2023-12-18 19:48:22,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:48:22,698 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2023-12-18 19:48:22,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 211 states, 211 states have (on average 1.09478672985782) internal successors, (231), 211 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:48:22,699 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2023-12-18 19:48:22,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-18 19:48:22,699 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:48:22,699 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:48:22,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-18 19:48:22,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-18 19:48:22,900 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:48:22,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:48:22,900 INFO L85 PathProgramCache]: Analyzing trace with hash -454297184, now seen corresponding path program 13 times [2023-12-18 19:48:22,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:48:22,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044896474] [2023-12-18 19:48:22,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:48:22,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:48:22,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:48:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-12-18 19:48:23,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:48:23,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044896474] [2023-12-18 19:48:23,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044896474] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:48:23,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590440142] [2023-12-18 19:48:23,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 19:48:23,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:48:23,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:48:23,060 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:48:23,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-18 19:48:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:48:23,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-18 19:48:23,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:48:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-12-18 19:48:23,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:48:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-12-18 19:48:23,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590440142] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:48:23,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:48:23,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-12-18 19:48:23,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355146845] [2023-12-18 19:48:23,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:48:23,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-18 19:48:23,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:48:23,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-18 19:48:23,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2023-12-18 19:48:23,357 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 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) [2023-12-18 19:48:23,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:48:23,571 INFO L93 Difference]: Finished difference Result 170 states and 200 transitions. [2023-12-18 19:48:23,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-18 19:48:23,571 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 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 83 [2023-12-18 19:48:23,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:48:23,571 INFO L225 Difference]: With dead ends: 170 [2023-12-18 19:48:23,571 INFO L226 Difference]: Without dead ends: 93 [2023-12-18 19:48:23,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 146 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2023-12-18 19:48:23,572 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:48:23,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 53 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 19:48:23,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-12-18 19:48:23,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-12-18 19:48:23,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.1195652173913044) internal successors, (103), 92 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:48:23,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2023-12-18 19:48:23,621 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 83 [2023-12-18 19:48:23,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:48:23,621 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2023-12-18 19:48:23,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 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) [2023-12-18 19:48:23,622 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2023-12-18 19:48:23,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-18 19:48:23,622 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:48:23,622 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:48:23,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-18 19:48:23,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-18 19:48:23,827 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:48:23,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:48:23,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1908701114, now seen corresponding path program 14 times [2023-12-18 19:48:23,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:48:23,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365803413] [2023-12-18 19:48:23,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:48:23,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:48:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:48:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 13 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:48:34,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:48:34,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365803413] [2023-12-18 19:48:34,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365803413] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:48:34,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900760665] [2023-12-18 19:48:34,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:48:34,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:48:34,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:48:34,094 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:48:34,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-18 19:48:34,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:48:34,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:48:34,196 WARN L260 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 264 conjunts are in the unsatisfiable core [2023-12-18 19:48:34,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:48:34,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:48:39,955 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:48:39,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:48:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-18 19:48:51,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900760665] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:48:51,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:48:51,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 72, 69] total 200 [2023-12-18 19:48:51,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779563946] [2023-12-18 19:48:51,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:48:51,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2023-12-18 19:48:51,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:48:51,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2023-12-18 19:48:51,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=39098, Unknown=0, NotChecked=0, Total=39800 [2023-12-18 19:48:51,897 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 200 states, 200 states have (on average 1.235) internal successors, (247), 200 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:49:21,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:49:21,698 INFO L93 Difference]: Finished difference Result 304 states and 344 transitions. [2023-12-18 19:49:21,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-12-18 19:49:21,698 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 200 states have (on average 1.235) internal successors, (247), 200 states have internal predecessors, (247), 0 states have call successors, (0), 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 92 [2023-12-18 19:49:21,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:49:21,699 INFO L225 Difference]: With dead ends: 304 [2023-12-18 19:49:21,699 INFO L226 Difference]: Without dead ends: 298 [2023-12-18 19:49:21,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22773 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=2827, Invalid=91115, Unknown=0, NotChecked=0, Total=93942 [2023-12-18 19:49:21,703 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 378 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 21330 mSolverCounterSat, 1373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 22703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1373 IncrementalHoareTripleChecker+Valid, 21330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2023-12-18 19:49:21,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 841 Invalid, 22703 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1373 Valid, 21330 Invalid, 0 Unknown, 0 Unchecked, 11.8s Time] [2023-12-18 19:49:21,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-12-18 19:49:21,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 178. [2023-12-18 19:49:21,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.1355932203389831) internal successors, (201), 177 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:49:21,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 201 transitions. [2023-12-18 19:49:21,832 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 201 transitions. Word has length 92 [2023-12-18 19:49:21,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:49:21,833 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 201 transitions. [2023-12-18 19:49:21,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 200 states have (on average 1.235) internal successors, (247), 200 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:49:21,833 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 201 transitions. [2023-12-18 19:49:21,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-18 19:49:21,833 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:49:21,834 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:49:21,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-18 19:49:22,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:49:22,037 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:49:22,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:49:22,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1579698112, now seen corresponding path program 15 times [2023-12-18 19:49:22,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:49:22,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816333818] [2023-12-18 19:49:22,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:49:22,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:49:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:49:22,256 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2023-12-18 19:49:22,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:49:22,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816333818] [2023-12-18 19:49:22,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816333818] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:49:22,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369883903] [2023-12-18 19:49:22,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:49:22,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:49:22,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:49:22,257 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:49:22,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-18 19:49:22,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-18 19:49:22,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:49:22,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-18 19:49:22,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:49:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2023-12-18 19:49:22,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:49:22,684 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2023-12-18 19:49:22,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369883903] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:49:22,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:49:22,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-12-18 19:49:22,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320740022] [2023-12-18 19:49:22,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:49:22,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-18 19:49:22,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:49:22,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-18 19:49:22,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2023-12-18 19:49:22,685 INFO L87 Difference]: Start difference. First operand 178 states and 201 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 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) [2023-12-18 19:49:23,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:49:23,145 INFO L93 Difference]: Finished difference Result 338 states and 380 transitions. [2023-12-18 19:49:23,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-18 19:49:23,145 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2023-12-18 19:49:23,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:49:23,146 INFO L225 Difference]: With dead ends: 338 [2023-12-18 19:49:23,146 INFO L226 Difference]: Without dead ends: 129 [2023-12-18 19:49:23,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 164 SyntacticMatches, 13 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2023-12-18 19:49:23,146 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 19:49:23,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 86 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 19:49:23,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-12-18 19:49:23,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-12-18 19:49:23,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.125) internal successors, (144), 128 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:49:23,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 144 transitions. [2023-12-18 19:49:23,233 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 144 transitions. Word has length 93 [2023-12-18 19:49:23,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:49:23,233 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 144 transitions. [2023-12-18 19:49:23,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 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) [2023-12-18 19:49:23,233 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 144 transitions. [2023-12-18 19:49:23,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-12-18 19:49:23,234 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:49:23,234 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:49:23,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-18 19:49:23,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-18 19:49:23,439 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:49:23,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:49:23,440 INFO L85 PathProgramCache]: Analyzing trace with hash -223703231, now seen corresponding path program 16 times [2023-12-18 19:49:23,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:49:23,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756254551] [2023-12-18 19:49:23,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:49:23,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:49:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:49:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-12-18 19:49:23,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:49:23,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756254551] [2023-12-18 19:49:23,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756254551] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:49:23,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837686138] [2023-12-18 19:49:23,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:49:23,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:49:23,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:49:23,621 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:49:23,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-18 19:49:23,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:49:23,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:49:23,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-18 19:49:23,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:49:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-12-18 19:49:23,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:49:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-12-18 19:49:24,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837686138] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:49:24,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:49:24,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2023-12-18 19:49:24,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70311708] [2023-12-18 19:49:24,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:49:24,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-18 19:49:24,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:49:24,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-18 19:49:24,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2023-12-18 19:49:24,152 INFO L87 Difference]: Start difference. First operand 129 states and 144 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:49:24,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:49:24,586 INFO L93 Difference]: Finished difference Result 215 states and 248 transitions. [2023-12-18 19:49:24,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-18 19:49:24,587 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 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 94 [2023-12-18 19:49:24,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:49:24,587 INFO L225 Difference]: With dead ends: 215 [2023-12-18 19:49:24,587 INFO L226 Difference]: Without dead ends: 104 [2023-12-18 19:49:24,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 158 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=1845, Unknown=0, NotChecked=0, Total=2162 [2023-12-18 19:49:24,588 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 101 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 19:49:24,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 99 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 19:49:24,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-12-18 19:49:24,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2023-12-18 19:49:24,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.1067961165048543) internal successors, (114), 103 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:49:24,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2023-12-18 19:49:24,664 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 94 [2023-12-18 19:49:24,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:49:24,664 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2023-12-18 19:49:24,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:49:24,665 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2023-12-18 19:49:24,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-18 19:49:24,665 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:49:24,665 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:49:24,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-18 19:49:24,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:49:24,866 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:49:24,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:49:24,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1251255574, now seen corresponding path program 17 times [2023-12-18 19:49:24,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:49:24,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248068697] [2023-12-18 19:49:24,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:49:24,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:49:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:49:38,699 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 45 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:49:38,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:49:38,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248068697] [2023-12-18 19:49:38,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248068697] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:49:38,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270447562] [2023-12-18 19:49:38,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:49:38,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:49:38,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:49:38,700 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:49:38,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-18 19:49:38,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-18 19:49:38,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:49:38,958 WARN L260 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 312 conjunts are in the unsatisfiable core [2023-12-18 19:49:38,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:49:38,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:49:38,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:49:38,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:49:39,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:49:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:49:43,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:49:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-18 19:49:59,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270447562] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:49:59,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:49:59,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 83, 79] total 207 [2023-12-18 19:49:59,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775028616] [2023-12-18 19:49:59,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:49:59,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 207 states [2023-12-18 19:49:59,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:49:59,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2023-12-18 19:49:59,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=719, Invalid=41923, Unknown=0, NotChecked=0, Total=42642 [2023-12-18 19:49:59,804 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 207 states, 207 states have (on average 1.2222222222222223) internal successors, (253), 207 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:50:30,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:50:30,976 INFO L93 Difference]: Finished difference Result 231 states and 258 transitions. [2023-12-18 19:50:30,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-12-18 19:50:30,977 INFO L78 Accepts]: Start accepts. Automaton has has 207 states, 207 states have (on average 1.2222222222222223) internal successors, (253), 207 states have internal predecessors, (253), 0 states have call successors, (0), 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 103 [2023-12-18 19:50:30,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:50:30,977 INFO L225 Difference]: With dead ends: 231 [2023-12-18 19:50:30,977 INFO L226 Difference]: Without dead ends: 227 [2023-12-18 19:50:30,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19546 ImplicationChecksByTransitivity, 40.9s TimeCoverageRelationStatistics Valid=2613, Invalid=84117, Unknown=0, NotChecked=0, Total=86730 [2023-12-18 19:50:30,981 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 258 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 24526 mSolverCounterSat, 936 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 25462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 936 IncrementalHoareTripleChecker+Valid, 24526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2023-12-18 19:50:30,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 945 Invalid, 25462 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [936 Valid, 24526 Invalid, 0 Unknown, 0 Unchecked, 13.7s Time] [2023-12-18 19:50:30,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-12-18 19:50:31,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 143. [2023-12-18 19:50:31,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.1126760563380282) internal successors, (158), 142 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:50:31,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 158 transitions. [2023-12-18 19:50:31,096 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 158 transitions. Word has length 103 [2023-12-18 19:50:31,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:50:31,096 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 158 transitions. [2023-12-18 19:50:31,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 207 states, 207 states have (on average 1.2222222222222223) internal successors, (253), 207 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:50:31,096 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 158 transitions. [2023-12-18 19:50:31,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-12-18 19:50:31,097 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:50:31,097 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:50:31,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-18 19:50:31,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:50:31,302 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:50:31,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:50:31,303 INFO L85 PathProgramCache]: Analyzing trace with hash 2019441786, now seen corresponding path program 18 times [2023-12-18 19:50:31,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:50:31,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534085041] [2023-12-18 19:50:31,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:50:31,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:50:31,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:50:31,526 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-12-18 19:50:31,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:50:31,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534085041] [2023-12-18 19:50:31,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534085041] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:50:31,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472981043] [2023-12-18 19:50:31,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 19:50:31,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:50:31,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:50:31,528 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:50:31,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-18 19:50:31,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-18 19:50:31,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:50:31,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-18 19:50:31,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:50:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-12-18 19:50:31,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:50:31,996 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-12-18 19:50:31,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472981043] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:50:31,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:50:31,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-12-18 19:50:31,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213307193] [2023-12-18 19:50:31,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:50:31,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-18 19:50:31,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:50:31,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-18 19:50:31,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2023-12-18 19:50:31,997 INFO L87 Difference]: Start difference. First operand 143 states and 158 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:50:32,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:50:32,545 INFO L93 Difference]: Finished difference Result 359 states and 398 transitions. [2023-12-18 19:50:32,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-18 19:50:32,545 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 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 104 [2023-12-18 19:50:32,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:50:32,546 INFO L225 Difference]: With dead ends: 359 [2023-12-18 19:50:32,546 INFO L226 Difference]: Without dead ends: 144 [2023-12-18 19:50:32,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 183 SyntacticMatches, 15 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2023-12-18 19:50:32,547 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 47 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 19:50:32,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 66 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 19:50:32,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-12-18 19:50:32,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2023-12-18 19:50:32,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.1118881118881119) internal successors, (159), 143 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:50:32,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 159 transitions. [2023-12-18 19:50:32,660 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 159 transitions. Word has length 104 [2023-12-18 19:50:32,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:50:32,660 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 159 transitions. [2023-12-18 19:50:32,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:50:32,661 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 159 transitions. [2023-12-18 19:50:32,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-12-18 19:50:32,661 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:50:32,661 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:50:32,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-18 19:50:32,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:50:32,862 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:50:32,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:50:32,862 INFO L85 PathProgramCache]: Analyzing trace with hash 165718745, now seen corresponding path program 19 times [2023-12-18 19:50:32,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:50:32,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789853391] [2023-12-18 19:50:32,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:50:32,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:50:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:50:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2023-12-18 19:50:33,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:50:33,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789853391] [2023-12-18 19:50:33,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789853391] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:50:33,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641134315] [2023-12-18 19:50:33,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 19:50:33,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:50:33,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:50:33,086 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:50:33,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-18 19:50:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:50:33,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-18 19:50:33,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:50:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2023-12-18 19:50:33,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:50:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2023-12-18 19:50:33,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641134315] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:50:33,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:50:33,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-12-18 19:50:33,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295243052] [2023-12-18 19:50:33,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:50:33,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-18 19:50:33,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:50:33,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-18 19:50:33,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2023-12-18 19:50:33,434 INFO L87 Difference]: Start difference. First operand 144 states and 159 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:50:33,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:50:33,778 INFO L93 Difference]: Finished difference Result 239 states and 272 transitions. [2023-12-18 19:50:33,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-18 19:50:33,778 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 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 105 [2023-12-18 19:50:33,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:50:33,779 INFO L225 Difference]: With dead ends: 239 [2023-12-18 19:50:33,779 INFO L226 Difference]: Without dead ends: 115 [2023-12-18 19:50:33,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 184 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2023-12-18 19:50:33,780 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:50:33,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 71 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 19:50:33,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-12-18 19:50:33,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2023-12-18 19:50:33,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0964912280701755) internal successors, (125), 114 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:50:33,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2023-12-18 19:50:33,881 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 105 [2023-12-18 19:50:33,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:50:33,881 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2023-12-18 19:50:33,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:50:33,881 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2023-12-18 19:50:33,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-18 19:50:33,881 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:50:33,881 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:50:33,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-18 19:50:34,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:50:34,087 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:50:34,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:50:34,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1758518854, now seen corresponding path program 20 times [2023-12-18 19:50:34,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:50:34,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13773343] [2023-12-18 19:50:34,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:50:34,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:50:34,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:50:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 57 proven. 339 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:50:52,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:50:52,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13773343] [2023-12-18 19:50:52,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13773343] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:50:52,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229213595] [2023-12-18 19:50:52,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:50:52,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:50:52,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:50:52,054 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:50:52,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-18 19:50:52,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:50:52,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:50:52,206 WARN L260 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 348 conjunts are in the unsatisfiable core [2023-12-18 19:50:52,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:50:52,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:50:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:50:58,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:51:20,739 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-18 19:51:20,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229213595] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:51:20,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:51:20,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 94, 89] total 236 [2023-12-18 19:51:20,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857677915] [2023-12-18 19:51:20,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:51:20,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 236 states [2023-12-18 19:51:20,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:51:20,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 236 interpolants. [2023-12-18 19:51:20,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=919, Invalid=54541, Unknown=0, NotChecked=0, Total=55460 [2023-12-18 19:51:20,743 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand has 236 states, 236 states have (on average 1.1991525423728813) internal successors, (283), 236 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:51:55,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:51:55,605 INFO L93 Difference]: Finished difference Result 335 states and 368 transitions. [2023-12-18 19:51:55,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2023-12-18 19:51:55,605 INFO L78 Accepts]: Start accepts. Automaton has has 236 states, 236 states have (on average 1.1991525423728813) internal successors, (283), 236 states have internal predecessors, (283), 0 states have call successors, (0), 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 114 [2023-12-18 19:51:55,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:51:55,606 INFO L225 Difference]: With dead ends: 335 [2023-12-18 19:51:55,606 INFO L226 Difference]: Without dead ends: 329 [2023-12-18 19:51:55,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24043 ImplicationChecksByTransitivity, 49.5s TimeCoverageRelationStatistics Valid=2619, Invalid=100743, Unknown=0, NotChecked=0, Total=103362 [2023-12-18 19:51:55,610 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 178 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 30016 mSolverCounterSat, 1129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 31145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1129 IncrementalHoareTripleChecker+Valid, 30016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2023-12-18 19:51:55,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 601 Invalid, 31145 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1129 Valid, 30016 Invalid, 0 Unknown, 0 Unchecked, 17.3s Time] [2023-12-18 19:51:55,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-12-18 19:51:55,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 270. [2023-12-18 19:51:55,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.1078066914498141) internal successors, (298), 269 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:51:55,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 298 transitions. [2023-12-18 19:51:55,922 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 298 transitions. Word has length 114 [2023-12-18 19:51:55,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:51:55,922 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 298 transitions. [2023-12-18 19:51:55,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 236 states, 236 states have (on average 1.1991525423728813) internal successors, (283), 236 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:51:55,923 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 298 transitions. [2023-12-18 19:51:55,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-18 19:51:55,923 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:51:55,924 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:51:55,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-18 19:51:56,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-18 19:51:56,129 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:51:56,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:51:56,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1140018816, now seen corresponding path program 21 times [2023-12-18 19:51:56,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:51:56,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087818710] [2023-12-18 19:51:56,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:51:56,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:51:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:51:56,400 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-12-18 19:51:56,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:51:56,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087818710] [2023-12-18 19:51:56,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087818710] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:51:56,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122620501] [2023-12-18 19:51:56,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:51:56,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:51:56,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:51:56,402 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:51:56,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-18 19:51:56,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-18 19:51:56,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:51:56,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-18 19:51:56,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:51:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-12-18 19:51:56,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:51:57,161 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-12-18 19:51:57,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122620501] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:51:57,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:51:57,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2023-12-18 19:51:57,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201107531] [2023-12-18 19:51:57,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:51:57,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-18 19:51:57,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:51:57,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-18 19:51:57,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=2029, Unknown=0, NotChecked=0, Total=2352 [2023-12-18 19:51:57,163 INFO L87 Difference]: Start difference. First operand 270 states and 298 transitions. Second operand has 49 states, 49 states have (on average 2.183673469387755) internal successors, (107), 49 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:51:58,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:51:58,862 INFO L93 Difference]: Finished difference Result 483 states and 537 transitions. [2023-12-18 19:51:58,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-18 19:51:58,863 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.183673469387755) internal successors, (107), 49 states have internal predecessors, (107), 0 states have call successors, (0), 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 115 [2023-12-18 19:51:58,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:51:58,863 INFO L225 Difference]: With dead ends: 483 [2023-12-18 19:51:58,863 INFO L226 Difference]: Without dead ends: 216 [2023-12-18 19:51:58,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 212 SyntacticMatches, 10 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=676, Invalid=4154, Unknown=0, NotChecked=0, Total=4830 [2023-12-18 19:51:58,865 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 143 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 2953 mSolverCounterSat, 559 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 3512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 559 IncrementalHoareTripleChecker+Valid, 2953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:51:58,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 148 Invalid, 3512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [559 Valid, 2953 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-18 19:51:58,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-12-18 19:51:59,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 197. [2023-12-18 19:51:59,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.096938775510204) internal successors, (215), 196 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:51:59,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 215 transitions. [2023-12-18 19:51:59,089 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 215 transitions. Word has length 115 [2023-12-18 19:51:59,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:51:59,089 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 215 transitions. [2023-12-18 19:51:59,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.183673469387755) internal successors, (107), 49 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:51:59,089 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 215 transitions. [2023-12-18 19:51:59,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-18 19:51:59,090 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:51:59,090 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:51:59,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-18 19:51:59,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-18 19:51:59,296 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:51:59,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:51:59,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1403024376, now seen corresponding path program 22 times [2023-12-18 19:51:59,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:51:59,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050640757] [2023-12-18 19:51:59,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:51:59,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:51:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:51:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2023-12-18 19:51:59,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:51:59,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050640757] [2023-12-18 19:51:59,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050640757] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:51:59,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687900964] [2023-12-18 19:51:59,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:51:59,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:51:59,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:51:59,567 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:51:59,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-18 19:51:59,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:51:59,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:51:59,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-18 19:51:59,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:52:00,028 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2023-12-18 19:52:00,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:52:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2023-12-18 19:52:00,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687900964] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:52:00,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:52:00,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2023-12-18 19:52:00,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587558447] [2023-12-18 19:52:00,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:52:00,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-18 19:52:00,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:52:00,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-18 19:52:00,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2023-12-18 19:52:00,375 INFO L87 Difference]: Start difference. First operand 197 states and 215 transitions. Second operand has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:52:00,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:52:00,965 INFO L93 Difference]: Finished difference Result 290 states and 316 transitions. [2023-12-18 19:52:00,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-18 19:52:00,965 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 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 116 [2023-12-18 19:52:00,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:52:00,966 INFO L225 Difference]: With dead ends: 290 [2023-12-18 19:52:00,966 INFO L226 Difference]: Without dead ends: 126 [2023-12-18 19:52:00,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 194 SyntacticMatches, 10 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=486, Invalid=2936, Unknown=0, NotChecked=0, Total=3422 [2023-12-18 19:52:00,967 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 140 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 19:52:00,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 90 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 19:52:00,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-12-18 19:52:01,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-12-18 19:52:01,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.088) internal successors, (136), 125 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:52:01,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2023-12-18 19:52:01,089 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 116 [2023-12-18 19:52:01,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:52:01,090 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2023-12-18 19:52:01,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:52:01,090 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2023-12-18 19:52:01,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-18 19:52:01,090 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:52:01,090 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:52:01,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-18 19:52:01,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:52:01,295 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:52:01,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:52:01,296 INFO L85 PathProgramCache]: Analyzing trace with hash -577297770, now seen corresponding path program 23 times [2023-12-18 19:52:01,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:52:01,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246986416] [2023-12-18 19:52:01,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:52:01,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:52:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:52:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 57 proven. 438 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:52:25,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:52:25,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246986416] [2023-12-18 19:52:25,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246986416] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:52:25,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502499580] [2023-12-18 19:52:25,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:52:25,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:52:25,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:52:25,134 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:52:25,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-18 19:52:25,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-18 19:52:25,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:52:25,586 WARN L260 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 402 conjunts are in the unsatisfiable core [2023-12-18 19:52:25,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:52:25,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:52:25,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:52:25,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:52:25,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:52:25,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:52:26,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:52:26,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:52:35,255 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:52:35,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:53:06,673 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-18 19:53:06,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502499580] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:53:06,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:53:06,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 105, 99] total 268 [2023-12-18 19:53:06,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976509033] [2023-12-18 19:53:06,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:53:06,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 268 states [2023-12-18 19:53:06,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:53:06,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 268 interpolants. [2023-12-18 19:53:06,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=944, Invalid=70612, Unknown=0, NotChecked=0, Total=71556 [2023-12-18 19:53:06,677 INFO L87 Difference]: Start difference. First operand 126 states and 136 transitions. Second operand has 268 states, 268 states have (on average 1.1753731343283582) internal successors, (315), 268 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:54:04,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:54:04,337 INFO L93 Difference]: Finished difference Result 497 states and 547 transitions. [2023-12-18 19:54:04,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2023-12-18 19:54:04,337 INFO L78 Accepts]: Start accepts. Automaton has has 268 states, 268 states have (on average 1.1753731343283582) internal successors, (315), 268 states have internal predecessors, (315), 0 states have call successors, (0), 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 125 [2023-12-18 19:54:04,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:54:04,338 INFO L225 Difference]: With dead ends: 497 [2023-12-18 19:54:04,338 INFO L226 Difference]: Without dead ends: 491 [2023-12-18 19:54:04,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 394 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33874 ImplicationChecksByTransitivity, 79.1s TimeCoverageRelationStatistics Valid=4062, Invalid=152358, Unknown=0, NotChecked=0, Total=156420 [2023-12-18 19:54:04,344 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 302 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 39090 mSolverCounterSat, 1735 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 40825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1735 IncrementalHoareTripleChecker+Valid, 39090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:54:04,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 1032 Invalid, 40825 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1735 Valid, 39090 Invalid, 0 Unknown, 0 Unchecked, 24.0s Time] [2023-12-18 19:54:04,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2023-12-18 19:54:04,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 297. [2023-12-18 19:54:04,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.1013513513513513) internal successors, (326), 296 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:54:04,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 326 transitions. [2023-12-18 19:54:04,702 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 326 transitions. Word has length 125 [2023-12-18 19:54:04,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:54:04,702 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 326 transitions. [2023-12-18 19:54:04,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 268 states, 268 states have (on average 1.1753731343283582) internal successors, (315), 268 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:54:04,702 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 326 transitions. [2023-12-18 19:54:04,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-12-18 19:54:04,703 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:54:04,703 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:54:04,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-18 19:54:04,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:54:04,910 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:54:04,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:54:04,910 INFO L85 PathProgramCache]: Analyzing trace with hash 294049466, now seen corresponding path program 24 times [2023-12-18 19:54:04,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:54:04,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020771393] [2023-12-18 19:54:04,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:54:04,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:54:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:54:05,269 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2023-12-18 19:54:05,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:54:05,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020771393] [2023-12-18 19:54:05,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020771393] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:54:05,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709769077] [2023-12-18 19:54:05,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 19:54:05,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:54:05,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:54:05,271 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:54:05,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-18 19:54:05,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-12-18 19:54:05,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:54:05,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-18 19:54:05,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:54:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2023-12-18 19:54:05,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:54:06,032 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2023-12-18 19:54:06,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709769077] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:54:06,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:54:06,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-12-18 19:54:06,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638057046] [2023-12-18 19:54:06,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:54:06,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-18 19:54:06,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:54:06,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-18 19:54:06,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2023-12-18 19:54:06,033 INFO L87 Difference]: Start difference. First operand 297 states and 326 transitions. Second operand has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:54:06,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:54:06,820 INFO L93 Difference]: Finished difference Result 491 states and 536 transitions. [2023-12-18 19:54:06,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-18 19:54:06,820 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 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 126 [2023-12-18 19:54:06,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:54:06,821 INFO L225 Difference]: With dead ends: 491 [2023-12-18 19:54:06,821 INFO L226 Difference]: Without dead ends: 219 [2023-12-18 19:54:06,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 221 SyntacticMatches, 19 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=976, Unknown=0, NotChecked=0, Total=1260 [2023-12-18 19:54:06,822 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 19:54:06,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 76 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 19:54:06,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-12-18 19:54:07,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2023-12-18 19:54:07,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.0963302752293578) internal successors, (239), 218 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:54:07,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 239 transitions. [2023-12-18 19:54:07,076 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 239 transitions. Word has length 126 [2023-12-18 19:54:07,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:54:07,076 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 239 transitions. [2023-12-18 19:54:07,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:54:07,076 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 239 transitions. [2023-12-18 19:54:07,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-12-18 19:54:07,076 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:54:07,077 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:54:07,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-18 19:54:07,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-18 19:54:07,282 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:54:07,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:54:07,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1850248544, now seen corresponding path program 25 times [2023-12-18 19:54:07,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:54:07,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264680917] [2023-12-18 19:54:07,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:54:07,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:54:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:54:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2023-12-18 19:54:07,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:54:07,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264680917] [2023-12-18 19:54:07,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264680917] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:54:07,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691993997] [2023-12-18 19:54:07,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 19:54:07,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:54:07,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:54:07,616 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:54:07,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-18 19:54:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:54:07,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-18 19:54:07,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:54:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2023-12-18 19:54:07,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:54:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2023-12-18 19:54:08,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691993997] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:54:08,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:54:08,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-12-18 19:54:08,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290175877] [2023-12-18 19:54:08,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:54:08,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-18 19:54:08,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:54:08,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-18 19:54:08,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=901, Unknown=0, NotChecked=0, Total=1190 [2023-12-18 19:54:08,102 INFO L87 Difference]: Start difference. First operand 219 states and 239 transitions. Second operand has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:54:08,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:54:08,542 INFO L93 Difference]: Finished difference Result 321 states and 358 transitions. [2023-12-18 19:54:08,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-18 19:54:08,542 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 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 127 [2023-12-18 19:54:08,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:54:08,543 INFO L225 Difference]: With dead ends: 321 [2023-12-18 19:54:08,543 INFO L226 Difference]: Without dead ends: 137 [2023-12-18 19:54:08,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 222 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2023-12-18 19:54:08,544 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:54:08,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 80 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 19:54:08,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-12-18 19:54:08,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2023-12-18 19:54:08,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0808823529411764) internal successors, (147), 136 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:54:08,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 147 transitions. [2023-12-18 19:54:08,699 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 147 transitions. Word has length 127 [2023-12-18 19:54:08,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:54:08,699 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 147 transitions. [2023-12-18 19:54:08,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:54:08,699 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 147 transitions. [2023-12-18 19:54:08,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-12-18 19:54:08,700 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:54:08,700 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:54:08,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-18 19:54:08,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-18 19:54:08,906 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:54:08,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:54:08,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1991824454, now seen corresponding path program 26 times [2023-12-18 19:54:08,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:54:08,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105772014] [2023-12-18 19:54:08,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:54:08,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:54:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:54:38,060 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 71 proven. 534 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:54:38,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:54:38,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105772014] [2023-12-18 19:54:38,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105772014] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:54:38,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633318402] [2023-12-18 19:54:38,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:54:38,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:54:38,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:54:38,062 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:54:38,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-18 19:54:38,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:54:38,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:54:38,245 WARN L260 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 432 conjunts are in the unsatisfiable core [2023-12-18 19:54:38,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:54:38,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:54:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 0 proven. 605 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:54:49,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:55:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 0 proven. 550 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-18 19:55:28,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633318402] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:55:28,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:55:28,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 116, 109] total 293 [2023-12-18 19:55:28,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512558090] [2023-12-18 19:55:28,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:55:28,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 293 states [2023-12-18 19:55:28,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:55:28,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 293 interpolants. [2023-12-18 19:55:28,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1193, Invalid=84363, Unknown=0, NotChecked=0, Total=85556 [2023-12-18 19:55:28,259 INFO L87 Difference]: Start difference. First operand 137 states and 147 transitions. Second operand has 293 states, 293 states have (on average 1.1604095563139931) internal successors, (340), 293 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:56:47,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:56:47,366 INFO L93 Difference]: Finished difference Result 436 states and 476 transitions. [2023-12-18 19:56:47,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2023-12-18 19:56:47,367 INFO L78 Accepts]: Start accepts. Automaton has has 293 states, 293 states have (on average 1.1604095563139931) internal successors, (340), 293 states have internal predecessors, (340), 0 states have call successors, (0), 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 136 [2023-12-18 19:56:47,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:56:47,368 INFO L225 Difference]: With dead ends: 436 [2023-12-18 19:56:47,368 INFO L226 Difference]: Without dead ends: 430 [2023-12-18 19:56:47,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 448 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44752 ImplicationChecksByTransitivity, 104.3s TimeCoverageRelationStatistics Valid=5346, Invalid=196704, Unknown=0, NotChecked=0, Total=202050 [2023-12-18 19:56:47,375 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 433 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 46987 mSolverCounterSat, 2268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 49255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2268 IncrementalHoareTripleChecker+Valid, 46987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.9s IncrementalHoareTripleChecker+Time [2023-12-18 19:56:47,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 1160 Invalid, 49255 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2268 Valid, 46987 Invalid, 0 Unknown, 0 Unchecked, 29.9s Time] [2023-12-18 19:56:47,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2023-12-18 19:56:47,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 262. [2023-12-18 19:56:47,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.0919540229885059) internal successors, (285), 261 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:56:47,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 285 transitions. [2023-12-18 19:56:47,737 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 285 transitions. Word has length 136 [2023-12-18 19:56:47,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:56:47,737 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 285 transitions. [2023-12-18 19:56:47,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 293 states, 293 states have (on average 1.1604095563139931) internal successors, (340), 293 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:56:47,737 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 285 transitions. [2023-12-18 19:56:47,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-18 19:56:47,738 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:56:47,738 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:56:47,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-18 19:56:47,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-18 19:56:47,944 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:56:47,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:56:47,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1494480064, now seen corresponding path program 27 times [2023-12-18 19:56:47,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:56:47,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820423755] [2023-12-18 19:56:47,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:56:47,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:56:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:56:48,330 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-12-18 19:56:48,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:56:48,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820423755] [2023-12-18 19:56:48,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820423755] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:56:48,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35024596] [2023-12-18 19:56:48,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:56:48,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:56:48,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:56:48,331 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:56:48,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-18 19:56:48,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-18 19:56:48,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:56:48,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-18 19:56:48,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:56:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-12-18 19:56:49,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:56:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-12-18 19:56:49,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35024596] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:56:49,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:56:49,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2023-12-18 19:56:49,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8403416] [2023-12-18 19:56:49,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:56:49,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-18 19:56:49,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:56:49,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-18 19:56:49,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1852, Unknown=0, NotChecked=0, Total=2256 [2023-12-18 19:56:49,287 INFO L87 Difference]: Start difference. First operand 262 states and 285 transitions. Second operand has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:56:50,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:56:50,645 INFO L93 Difference]: Finished difference Result 544 states and 595 transitions. [2023-12-18 19:56:50,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-18 19:56:50,646 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 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 137 [2023-12-18 19:56:50,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:56:50,647 INFO L225 Difference]: With dead ends: 544 [2023-12-18 19:56:50,647 INFO L226 Difference]: Without dead ends: 207 [2023-12-18 19:56:50,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 241 SyntacticMatches, 21 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1705 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=639, Invalid=2901, Unknown=0, NotChecked=0, Total=3540 [2023-12-18 19:56:50,647 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 99 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-18 19:56:50,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 75 Invalid, 1909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-18 19:56:50,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-12-18 19:56:50,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 195. [2023-12-18 19:56:50,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.077319587628866) internal successors, (209), 194 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:56:50,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2023-12-18 19:56:50,921 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 137 [2023-12-18 19:56:50,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:56:50,922 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2023-12-18 19:56:50,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:56:50,922 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2023-12-18 19:56:50,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-18 19:56:50,922 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:56:50,922 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:56:50,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-18 19:56:51,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:56:51,124 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:56:51,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:56:51,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1457901019, now seen corresponding path program 28 times [2023-12-18 19:56:51,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:56:51,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323328212] [2023-12-18 19:56:51,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:56:51,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:56:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:56:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2023-12-18 19:56:51,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:56:51,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323328212] [2023-12-18 19:56:51,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323328212] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:56:51,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913918218] [2023-12-18 19:56:51,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:56:51,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:56:51,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:56:51,532 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:56:51,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-18 19:56:51,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:56:51,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:56:51,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-18 19:56:51,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:56:52,077 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2023-12-18 19:56:52,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:56:52,390 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2023-12-18 19:56:52,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913918218] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:56:52,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:56:52,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2023-12-18 19:56:52,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815305656] [2023-12-18 19:56:52,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:56:52,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-18 19:56:52,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:56:52,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-18 19:56:52,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1852, Unknown=0, NotChecked=0, Total=2256 [2023-12-18 19:56:52,392 INFO L87 Difference]: Start difference. First operand 195 states and 209 transitions. Second operand has 48 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 48 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:56:53,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:56:53,307 INFO L93 Difference]: Finished difference Result 200 states and 214 transitions. [2023-12-18 19:56:53,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-18 19:56:53,308 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 48 states have internal predecessors, (85), 0 states have call successors, (0), 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 142 [2023-12-18 19:56:53,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:56:53,308 INFO L225 Difference]: With dead ends: 200 [2023-12-18 19:56:53,308 INFO L226 Difference]: Without dead ends: 148 [2023-12-18 19:56:53,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 239 SyntacticMatches, 22 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1996 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=637, Invalid=2903, Unknown=0, NotChecked=0, Total=3540 [2023-12-18 19:56:53,309 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 72 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-18 19:56:53,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 56 Invalid, 1912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-18 19:56:53,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-12-18 19:56:53,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2023-12-18 19:56:53,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0748299319727892) internal successors, (158), 147 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:56:53,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 158 transitions. [2023-12-18 19:56:53,513 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 158 transitions. Word has length 142 [2023-12-18 19:56:53,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:56:53,514 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 158 transitions. [2023-12-18 19:56:53,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 48 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:56:53,514 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 158 transitions. [2023-12-18 19:56:53,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-12-18 19:56:53,514 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:56:53,514 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:56:53,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 Received shutdown request... [2023-12-18 19:56:53,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:56:53,720 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:56:53,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:56:53,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1086439446, now seen corresponding path program 29 times [2023-12-18 19:56:53,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:56:53,722 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-18 19:56:53,722 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 148 with TraceHistMax 11,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [2111900210]. [2023-12-18 19:56:53,725 INFO L445 BasicCegarLoop]: Path program histogram: [29, 1, 1, 1] [2023-12-18 19:56:53,727 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-18 19:56:53,728 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 07:56:53 BoogieIcfgContainer [2023-12-18 19:56:53,728 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-18 19:56:53,728 INFO L158 Benchmark]: Toolchain (without parser) took 821485.31ms. Allocated memory was 257.9MB in the beginning and 2.1GB in the end (delta: 1.8GB). Free memory was 208.2MB in the beginning and 1.6GB in the end (delta: -1.3GB). Peak memory consumption was 468.7MB. Max. memory is 8.0GB. [2023-12-18 19:56:53,728 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 197.1MB. Free memory is still 148.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 19:56:53,729 INFO L158 Benchmark]: CACSL2BoogieTranslator took 185.79ms. Allocated memory is still 257.9MB. Free memory was 208.2MB in the beginning and 195.9MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-18 19:56:53,729 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.71ms. Allocated memory is still 257.9MB. Free memory was 195.9MB in the beginning and 194.1MB in the end (delta: 1.8MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-18 19:56:53,729 INFO L158 Benchmark]: Boogie Preprocessor took 36.33ms. Allocated memory is still 257.9MB. Free memory was 194.1MB in the beginning and 191.7MB in the end (delta: 2.4MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-12-18 19:56:53,729 INFO L158 Benchmark]: RCFGBuilder took 302.18ms. Allocated memory is still 257.9MB. Free memory was 191.7MB in the beginning and 174.7MB in the end (delta: 17.0MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2023-12-18 19:56:53,729 INFO L158 Benchmark]: TraceAbstraction took 820921.92ms. Allocated memory was 257.9MB in the beginning and 2.1GB in the end (delta: 1.8GB). Free memory was 174.2MB in the beginning and 1.6GB in the end (delta: -1.4GB). Peak memory consumption was 435.1MB. Max. memory is 8.0GB. [2023-12-18 19:56:53,730 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 197.1MB. Free memory is still 148.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 185.79ms. Allocated memory is still 257.9MB. Free memory was 208.2MB in the beginning and 195.9MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 26.71ms. Allocated memory is still 257.9MB. Free memory was 195.9MB in the beginning and 194.1MB in the end (delta: 1.8MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.33ms. Allocated memory is still 257.9MB. Free memory was 194.1MB in the beginning and 191.7MB in the end (delta: 2.4MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 302.18ms. Allocated memory is still 257.9MB. Free memory was 191.7MB in the beginning and 174.7MB in the end (delta: 17.0MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * TraceAbstraction took 820921.92ms. Allocated memory was 257.9MB in the beginning and 2.1GB in the end (delta: 1.8GB). Free memory was 174.2MB in the beginning and 1.6GB in the end (delta: -1.4GB). Peak memory consumption was 435.1MB. 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: 8]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 8). Cancelled while NwaCegarLoop was analyzing trace of length 148 with TraceHistMax 11,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [2111900210]. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 820.9s, OverallIterations: 32, TraceHistogramMax: 11, PathProgramHistogramMax: 29, EmptinessCheckTime: 0.0s, AutomataDifference: 423.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5598 SdHoareTripleChecker+Valid, 175.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5598 mSDsluCounter, 8817 SdHoareTripleChecker+Invalid, 160.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8237 mSDsCounter, 20749 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 215154 IncrementalHoareTripleChecker+Invalid, 235903 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20749 mSolverCounterUnsat, 580 mSDtfsCounter, 215154 mSolverCounterSat, 0.6s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 7061 GetRequests, 3595 SyntacticMatches, 214 SemanticMatches, 3252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216544 ImplicationChecksByTransitivity, 526.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=297occurred in iteration=26, InterpolantAutomatonStates: 1552, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.3s AutomataMinimizationTime, 31 MinimizatonAttempts, 842 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 4.9s SatisfiabilityAnalysisTime, 381.3s InterpolantComputationTime, 5103 NumberOfCodeBlocks, 5060 NumberOfCodeBlocksAsserted, 110 NumberOfCheckSat, 7528 ConstructedInterpolants, 79 QuantifiedInterpolants, 151316 SizeOfPredicates, 129 NumberOfNonLiveVariables, 11293 ConjunctsInSsa, 2693 ConjunctsInUnsatCore, 87 InterpolantComputations, 3 PerfectInterpolantSequences, 13688/22000 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