/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 false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 08:54:37,055 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 08:54:37,119 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 08:54:37,122 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 08:54:37,122 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 08:54:37,147 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 08:54:37,147 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 08:54:37,148 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 08:54:37,148 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 08:54:37,151 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 08:54:37,151 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 08:54:37,151 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 08:54:37,152 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 08:54:37,153 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 08:54:37,153 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 08:54:37,153 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 08:54:37,153 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 08:54:37,153 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 08:54:37,153 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 08:54:37,154 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 08:54:37,154 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 08:54:37,154 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 08:54:37,154 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 08:54:37,154 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 08:54:37,154 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 08:54:37,154 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 08:54:37,155 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 08:54:37,155 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 08:54:37,155 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 08:54:37,155 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 08:54:37,156 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 08:54:37,156 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 08:54:37,156 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 08:54:37,156 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 08:54:37,156 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 08:54:37,157 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 08:54:37,157 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 08:54:37,157 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 08:54:37,157 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 08:54:37,157 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 08:54:37,157 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 08:54:37,157 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 08:54:37,157 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 08:54:37,157 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 08:54:37,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 08:54:37,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 08:54:37,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 08:54:37,352 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 08:54:37,352 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 08:54:37,353 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m3.c [2023-12-20 08:54:38,281 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 08:54:38,417 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 08:54:38,420 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m3.c [2023-12-20 08:54:38,424 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81b25bb01/6cf54db7760d4c8880d74519ee26f7c2/FLAG5f86a39c4 [2023-12-20 08:54:38,434 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81b25bb01/6cf54db7760d4c8880d74519ee26f7c2 [2023-12-20 08:54:38,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 08:54:38,436 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 08:54:38,437 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 08:54:38,437 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 08:54:38,440 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 08:54:38,441 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 08:54:38" (1/1) ... [2023-12-20 08:54:38,441 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c81600c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:54:38, skipping insertion in model container [2023-12-20 08:54:38,442 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 08:54:38" (1/1) ... [2023-12-20 08:54:38,456 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 08:54:38,555 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_const_m3.c[408,421] [2023-12-20 08:54:38,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 08:54:38,576 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 08:54:38,584 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_const_m3.c[408,421] [2023-12-20 08:54:38,590 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 08:54:38,599 INFO L206 MainTranslator]: Completed translation [2023-12-20 08:54:38,608 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:54:38 WrapperNode [2023-12-20 08:54:38,609 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 08:54:38,610 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 08:54:38,610 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 08:54:38,610 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 08:54:38,614 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:54:38" (1/1) ... [2023-12-20 08:54:38,629 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:54:38" (1/1) ... [2023-12-20 08:54:38,643 INFO L138 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 105 [2023-12-20 08:54:38,644 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 08:54:38,644 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 08:54:38,644 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 08:54:38,644 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 08:54:38,652 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:54:38" (1/1) ... [2023-12-20 08:54:38,652 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:54:38" (1/1) ... [2023-12-20 08:54:38,658 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:54:38" (1/1) ... [2023-12-20 08:54:38,667 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 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]. [2023-12-20 08:54:38,667 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:54:38" (1/1) ... [2023-12-20 08:54:38,667 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:54:38" (1/1) ... [2023-12-20 08:54:38,671 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:54:38" (1/1) ... [2023-12-20 08:54:38,674 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:54:38" (1/1) ... [2023-12-20 08:54:38,675 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:54:38" (1/1) ... [2023-12-20 08:54:38,675 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:54:38" (1/1) ... [2023-12-20 08:54:38,677 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 08:54:38,686 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 08:54:38,686 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 08:54:38,686 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 08:54:38,687 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:54:38" (1/1) ... [2023-12-20 08:54:38,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 08:54:38,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:54:38,715 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) [2023-12-20 08:54:38,736 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 [2023-12-20 08:54:38,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 08:54:38,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 08:54:38,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 08:54:38,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 08:54:38,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 08:54:38,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-20 08:54:38,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 08:54:38,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 08:54:38,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 08:54:38,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 08:54:38,791 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 08:54:38,793 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 08:54:38,925 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 08:54:38,951 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 08:54:38,951 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-12-20 08:54:38,951 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 08:54:38 BoogieIcfgContainer [2023-12-20 08:54:38,951 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 08:54:38,953 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 08:54:38,953 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 08:54:38,955 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 08:54:38,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 08:54:38" (1/3) ... [2023-12-20 08:54:38,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f27957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 08:54:38, skipping insertion in model container [2023-12-20 08:54:38,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:54:38" (2/3) ... [2023-12-20 08:54:38,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f27957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 08:54:38, skipping insertion in model container [2023-12-20 08:54:38,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 08:54:38" (3/3) ... [2023-12-20 08:54:38,957 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m3.c [2023-12-20 08:54:38,969 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 08:54:38,969 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 08:54:39,009 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 08:54:39,015 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;@9b71af5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 08:54:39,015 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 08:54:39,018 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.85) internal successors, (37), 21 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) [2023-12-20 08:54:39,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-20 08:54:39,025 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:54:39,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:54:39,026 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:54:39,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:54:39,031 INFO L85 PathProgramCache]: Analyzing trace with hash -978184044, now seen corresponding path program 1 times [2023-12-20 08:54:39,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:54:39,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995422383] [2023-12-20 08:54:39,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:54:39,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:54:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:54:39,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:54:39,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:54:39,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995422383] [2023-12-20 08:54:39,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995422383] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 08:54:39,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 08:54:39,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 08:54:39,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30736458] [2023-12-20 08:54:39,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 08:54:39,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 08:54:39,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:54:39,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 08:54:39,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 08:54:39,164 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.85) internal successors, (37), 21 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) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:39,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:54:39,194 INFO L93 Difference]: Finished difference Result 41 states and 68 transitions. [2023-12-20 08:54:39,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 08:54:39,199 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-20 08:54:39,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:54:39,203 INFO L225 Difference]: With dead ends: 41 [2023-12-20 08:54:39,203 INFO L226 Difference]: Without dead ends: 19 [2023-12-20 08:54:39,205 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 [2023-12-20 08:54:39,207 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:54:39,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:54:39,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-20 08:54:39,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-12-20 08:54:39,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:39,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2023-12-20 08:54:39,227 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 18 [2023-12-20 08:54:39,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:54:39,227 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2023-12-20 08:54:39,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:39,227 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2023-12-20 08:54:39,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-20 08:54:39,227 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:54:39,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:54:39,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 08:54:39,228 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:54:39,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:54:39,229 INFO L85 PathProgramCache]: Analyzing trace with hash 2084842272, now seen corresponding path program 1 times [2023-12-20 08:54:39,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:54:39,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560551468] [2023-12-20 08:54:39,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:54:39,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:54:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:54:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:54:39,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:54:39,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560551468] [2023-12-20 08:54:39,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560551468] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 08:54:39,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 08:54:39,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 08:54:39,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612860293] [2023-12-20 08:54:39,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 08:54:39,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 08:54:39,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:54:39,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 08:54:39,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 08:54:39,353 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:39,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:54:39,389 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2023-12-20 08:54:39,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 08:54:39,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-20 08:54:39,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:54:39,391 INFO L225 Difference]: With dead ends: 36 [2023-12-20 08:54:39,391 INFO L226 Difference]: Without dead ends: 20 [2023-12-20 08:54:39,392 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 [2023-12-20 08:54:39,394 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:54:39,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:54:39,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-20 08:54:39,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-20 08:54:39,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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) [2023-12-20 08:54:39,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2023-12-20 08:54:39,407 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 18 [2023-12-20 08:54:39,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:54:39,407 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-12-20 08:54:39,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:39,407 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2023-12-20 08:54:39,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-20 08:54:39,408 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:54:39,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:54:39,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-20 08:54:39,408 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:54:39,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:54:39,411 INFO L85 PathProgramCache]: Analyzing trace with hash 194798549, now seen corresponding path program 1 times [2023-12-20 08:54:39,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:54:39,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547994386] [2023-12-20 08:54:39,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:54:39,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:54:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:54:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 08:54:39,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:54:39,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547994386] [2023-12-20 08:54:39,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547994386] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 08:54:39,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 08:54:39,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 08:54:39,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252439134] [2023-12-20 08:54:39,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 08:54:39,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 08:54:39,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:54:39,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 08:54:39,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 08:54:39,495 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:39,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:54:39,555 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2023-12-20 08:54:39,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 08:54:39,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-20 08:54:39,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:54:39,557 INFO L225 Difference]: With dead ends: 40 [2023-12-20 08:54:39,557 INFO L226 Difference]: Without dead ends: 26 [2023-12-20 08:54:39,558 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 [2023-12-20 08:54:39,562 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:54:39,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 13 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:54:39,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-20 08:54:39,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-20 08:54:39,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:39,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-12-20 08:54:39,571 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 19 [2023-12-20 08:54:39,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:54:39,572 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-12-20 08:54:39,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:39,572 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-12-20 08:54:39,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-20 08:54:39,573 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:54:39,573 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] [2023-12-20 08:54:39,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-20 08:54:39,573 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:54:39,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:54:39,574 INFO L85 PathProgramCache]: Analyzing trace with hash -2129242726, now seen corresponding path program 1 times [2023-12-20 08:54:39,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:54:39,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178605269] [2023-12-20 08:54:39,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:54:39,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:54:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:54:39,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 08:54:39,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:54:39,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178605269] [2023-12-20 08:54:39,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178605269] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:54:39,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137137332] [2023-12-20 08:54:39,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:54:39,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:54:39,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:54:39,656 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) [2023-12-20 08:54:39,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 08:54:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:54:39,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 08:54:39,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:54:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 08:54:39,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:54:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 08:54:39,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137137332] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:54:39,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:54:39,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-20 08:54:39,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622279976] [2023-12-20 08:54:39,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:54:39,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 08:54:39,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:54:39,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 08:54:39,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-12-20 08:54:39,784 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:39,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:54:39,810 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2023-12-20 08:54:39,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 08:54:39,811 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-20 08:54:39,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:54:39,811 INFO L225 Difference]: With dead ends: 49 [2023-12-20 08:54:39,811 INFO L226 Difference]: Without dead ends: 27 [2023-12-20 08:54:39,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-12-20 08:54:39,812 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:54:39,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:54:39,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-20 08:54:39,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-12-20 08:54:39,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:39,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-12-20 08:54:39,816 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 25 [2023-12-20 08:54:39,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:54:39,816 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-12-20 08:54:39,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:39,817 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-12-20 08:54:39,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-20 08:54:39,817 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:54:39,817 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] [2023-12-20 08:54:39,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-20 08:54:40,022 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 [2023-12-20 08:54:40,022 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:54:40,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:54:40,023 INFO L85 PathProgramCache]: Analyzing trace with hash 851695429, now seen corresponding path program 2 times [2023-12-20 08:54:40,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:54:40,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690560378] [2023-12-20 08:54:40,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:54:40,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:54:40,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:54:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-20 08:54:40,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:54:40,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690560378] [2023-12-20 08:54:40,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690560378] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:54:40,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822486748] [2023-12-20 08:54:40,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:54:40,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:54:40,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:54:40,116 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) [2023-12-20 08:54:40,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 08:54:40,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:54:40,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:54:40,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 08:54:40,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:54:40,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-20 08:54:40,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:54:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-20 08:54:40,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822486748] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:54:40,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:54:40,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-12-20 08:54:40,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671454913] [2023-12-20 08:54:40,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:54:40,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-20 08:54:40,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:54:40,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-20 08:54:40,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-12-20 08:54:40,280 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:40,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:54:40,348 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2023-12-20 08:54:40,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 08:54:40,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-20 08:54:40,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:54:40,349 INFO L225 Difference]: With dead ends: 52 [2023-12-20 08:54:40,349 INFO L226 Difference]: Without dead ends: 33 [2023-12-20 08:54:40,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-12-20 08:54:40,350 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:54:40,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 19 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:54:40,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-20 08:54:40,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-12-20 08:54:40,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:40,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2023-12-20 08:54:40,356 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 26 [2023-12-20 08:54:40,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:54:40,356 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2023-12-20 08:54:40,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:40,356 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2023-12-20 08:54:40,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-20 08:54:40,358 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:54:40,361 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 08:54:40,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 08:54:40,565 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 [2023-12-20 08:54:40,565 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:54:40,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:54:40,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1536224032, now seen corresponding path program 3 times [2023-12-20 08:54:40,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:54:40,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401992997] [2023-12-20 08:54:40,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:54:40,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:54:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:54:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:54:42,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:54:42,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401992997] [2023-12-20 08:54:42,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401992997] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:54:42,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116422329] [2023-12-20 08:54:42,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:54:42,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:54:42,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:54:42,136 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) [2023-12-20 08:54:42,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 08:54:42,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-20 08:54:42,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:54:42,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 64 conjunts are in the unsatisfiable core [2023-12-20 08:54:42,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:54:42,230 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 [2023-12-20 08:54:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:54:42,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:54:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 08:54:43,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116422329] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:54:43,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:54:43,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 49 [2023-12-20 08:54:43,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106328857] [2023-12-20 08:54:43,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:54:43,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-20 08:54:43,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:54:43,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-20 08:54:43,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2194, Unknown=0, NotChecked=0, Total=2352 [2023-12-20 08:54:43,228 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 49 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) [2023-12-20 08:54:43,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:54:43,857 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2023-12-20 08:54:43,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-20 08:54:43,858 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 49 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 32 [2023-12-20 08:54:43,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:54:43,858 INFO L225 Difference]: With dead ends: 58 [2023-12-20 08:54:43,859 INFO L226 Difference]: Without dead ends: 54 [2023-12-20 08:54:43,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=195, Invalid=2885, Unknown=0, NotChecked=0, Total=3080 [2023-12-20 08:54:43,860 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 08:54:43,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 177 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 08:54:43,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-20 08:54:43,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2023-12-20 08:54:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 51 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) [2023-12-20 08:54:43,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2023-12-20 08:54:43,866 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 32 [2023-12-20 08:54:43,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:54:43,866 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2023-12-20 08:54:43,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 49 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) [2023-12-20 08:54:43,866 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2023-12-20 08:54:43,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-20 08:54:43,867 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:54:43,867 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:54:43,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 08:54:44,072 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 [2023-12-20 08:54:44,072 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:54:44,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:54:44,073 INFO L85 PathProgramCache]: Analyzing trace with hash -349916750, now seen corresponding path program 4 times [2023-12-20 08:54:44,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:54:44,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758752009] [2023-12-20 08:54:44,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:54:44,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:54:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:54:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-20 08:54:44,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:54:44,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758752009] [2023-12-20 08:54:44,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758752009] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:54:44,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710265416] [2023-12-20 08:54:44,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:54:44,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:54:44,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:54:44,139 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) [2023-12-20 08:54:44,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 08:54:44,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:54:44,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:54:44,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 08:54:44,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:54:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-20 08:54:44,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:54:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-20 08:54:44,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710265416] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:54:44,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:54:44,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-12-20 08:54:44,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173586191] [2023-12-20 08:54:44,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:54:44,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-20 08:54:44,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:54:44,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-20 08:54:44,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-20 08:54:44,289 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:44,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:54:44,413 INFO L93 Difference]: Finished difference Result 117 states and 142 transitions. [2023-12-20 08:54:44,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 08:54:44,413 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-12-20 08:54:44,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:54:44,414 INFO L225 Difference]: With dead ends: 117 [2023-12-20 08:54:44,414 INFO L226 Difference]: Without dead ends: 67 [2023-12-20 08:54:44,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-12-20 08:54:44,415 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 68 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:54:44,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 31 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:54:44,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-20 08:54:44,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2023-12-20 08:54:44,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:44,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2023-12-20 08:54:44,420 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 33 [2023-12-20 08:54:44,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:54:44,421 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2023-12-20 08:54:44,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:44,421 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2023-12-20 08:54:44,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-20 08:54:44,421 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:54:44,421 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:54:44,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 08:54:44,626 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 [2023-12-20 08:54:44,626 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:54:44,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:54:44,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1925180140, now seen corresponding path program 5 times [2023-12-20 08:54:44,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:54:44,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25713494] [2023-12-20 08:54:44,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:54:44,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:54:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:54:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-20 08:54:44,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:54:44,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25713494] [2023-12-20 08:54:44,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25713494] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:54:44,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375551723] [2023-12-20 08:54:44,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:54:44,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:54:44,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:54:44,704 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) [2023-12-20 08:54:44,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 08:54:44,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-20 08:54:44,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:54:44,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 08:54:44,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:54:44,813 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-20 08:54:44,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:54:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-20 08:54:44,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375551723] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:54:44,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:54:44,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-12-20 08:54:44,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036451878] [2023-12-20 08:54:44,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:54:44,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-20 08:54:44,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:54:44,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-20 08:54:44,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-20 08:54:44,855 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:44,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:54:44,961 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2023-12-20 08:54:44,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-20 08:54:44,962 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-20 08:54:44,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:54:44,963 INFO L225 Difference]: With dead ends: 60 [2023-12-20 08:54:44,963 INFO L226 Difference]: Without dead ends: 40 [2023-12-20 08:54:44,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2023-12-20 08:54:44,964 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 46 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:54:44,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 16 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:54:44,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-12-20 08:54:44,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-12-20 08:54:44,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:44,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2023-12-20 08:54:44,967 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 34 [2023-12-20 08:54:44,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:54:44,968 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2023-12-20 08:54:44,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:44,968 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2023-12-20 08:54:44,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-20 08:54:44,968 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:54:44,968 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 08:54:44,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 08:54:45,173 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 [2023-12-20 08:54:45,174 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:54:45,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:54:45,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1072637658, now seen corresponding path program 6 times [2023-12-20 08:54:45,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:54:45,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392053926] [2023-12-20 08:54:45,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:54:45,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:54:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:54:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:54:47,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:54:47,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392053926] [2023-12-20 08:54:47,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392053926] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:54:47,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127134243] [2023-12-20 08:54:47,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:54:47,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:54:47,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:54:47,540 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) [2023-12-20 08:54:47,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 08:54:47,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-12-20 08:54:47,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:54:47,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 82 conjunts are in the unsatisfiable core [2023-12-20 08:54:47,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:54:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 08:54:48,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:54:49,608 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:54:49,609 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 [2023-12-20 08:54:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 08:54:49,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127134243] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:54:49,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:54:49,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 24, 25] total 75 [2023-12-20 08:54:49,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182441086] [2023-12-20 08:54:49,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:54:49,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-12-20 08:54:49,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:54:49,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-12-20 08:54:49,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=5304, Unknown=0, NotChecked=0, Total=5550 [2023-12-20 08:54:49,821 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 75 states, 75 states have (on average 1.4) internal successors, (105), 75 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:52,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:54:52,234 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2023-12-20 08:54:52,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-12-20 08:54:52,241 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.4) internal successors, (105), 75 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-12-20 08:54:52,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:54:52,243 INFO L225 Difference]: With dead ends: 100 [2023-12-20 08:54:52,243 INFO L226 Difference]: Without dead ends: 96 [2023-12-20 08:54:52,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2140 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=503, Invalid=10209, Unknown=0, NotChecked=0, Total=10712 [2023-12-20 08:54:52,248 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 1985 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-20 08:54:52,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 168 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1985 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-20 08:54:52,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-12-20 08:54:52,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 63. [2023-12-20 08:54:52,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 62 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:52,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2023-12-20 08:54:52,264 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 39 [2023-12-20 08:54:52,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:54:52,264 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2023-12-20 08:54:52,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.4) internal successors, (105), 75 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:52,265 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2023-12-20 08:54:52,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-20 08:54:52,265 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:54:52,265 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:54:52,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 08:54:52,468 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 [2023-12-20 08:54:52,469 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:54:52,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:54:52,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1079582984, now seen corresponding path program 7 times [2023-12-20 08:54:52,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:54:52,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164969438] [2023-12-20 08:54:52,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:54:52,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:54:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:54:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-20 08:54:52,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:54:52,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164969438] [2023-12-20 08:54:52,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164969438] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:54:52,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057433797] [2023-12-20 08:54:52,567 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 08:54:52,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:54:52,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:54:52,569 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) [2023-12-20 08:54:52,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 08:54:52,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:54:52,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-20 08:54:52,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:54:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-20 08:54:52,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:54:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-20 08:54:52,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057433797] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:54:52,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:54:52,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-20 08:54:52,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803395697] [2023-12-20 08:54:52,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:54:52,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-20 08:54:52,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:54:52,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-20 08:54:52,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-12-20 08:54:52,770 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:52,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:54:52,946 INFO L93 Difference]: Finished difference Result 139 states and 164 transitions. [2023-12-20 08:54:52,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-20 08:54:52,946 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-12-20 08:54:52,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:54:52,947 INFO L225 Difference]: With dead ends: 139 [2023-12-20 08:54:52,947 INFO L226 Difference]: Without dead ends: 78 [2023-12-20 08:54:52,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-12-20 08:54:52,948 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 76 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:54:52,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 40 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:54:52,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-12-20 08:54:52,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2023-12-20 08:54:52,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 65 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:52,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2023-12-20 08:54:52,956 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 40 [2023-12-20 08:54:52,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:54:52,957 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2023-12-20 08:54:52,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:52,957 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2023-12-20 08:54:52,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-20 08:54:52,960 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:54:52,960 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:54:52,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-20 08:54:53,165 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 [2023-12-20 08:54:53,166 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:54:53,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:54:53,166 INFO L85 PathProgramCache]: Analyzing trace with hash 2102397606, now seen corresponding path program 8 times [2023-12-20 08:54:53,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:54:53,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40178345] [2023-12-20 08:54:53,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:54:53,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:54:53,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:54:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-20 08:54:53,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:54:53,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40178345] [2023-12-20 08:54:53,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40178345] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:54:53,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227203854] [2023-12-20 08:54:53,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:54:53,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:54:53,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:54:53,273 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) [2023-12-20 08:54:53,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 08:54:53,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:54:53,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:54:53,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-20 08:54:53,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:54:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-20 08:54:53,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:54:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-20 08:54:53,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227203854] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:54:53,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:54:53,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-20 08:54:53,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13230522] [2023-12-20 08:54:53,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:54:53,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-20 08:54:53,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:54:53,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-20 08:54:53,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-12-20 08:54:53,484 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:53,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:54:53,628 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2023-12-20 08:54:53,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-20 08:54:53,628 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-12-20 08:54:53,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:54:53,629 INFO L225 Difference]: With dead ends: 71 [2023-12-20 08:54:53,629 INFO L226 Difference]: Without dead ends: 47 [2023-12-20 08:54:53,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-12-20 08:54:53,632 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:54:53,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 25 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:54:53,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-20 08:54:53,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-12-20 08:54:53,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 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) [2023-12-20 08:54:53,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2023-12-20 08:54:53,637 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 41 [2023-12-20 08:54:53,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:54:53,637 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2023-12-20 08:54:53,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:53,637 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2023-12-20 08:54:53,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-20 08:54:53,637 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:54:53,637 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 08:54:53,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-20 08:54:53,842 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 [2023-12-20 08:54:53,845 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:54:53,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:54:53,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1513214304, now seen corresponding path program 9 times [2023-12-20 08:54:53,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:54:53,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432525563] [2023-12-20 08:54:53,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:54:53,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:54:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:54:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 1 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:54:56,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:54:56,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432525563] [2023-12-20 08:54:56,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432525563] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:54:56,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103876617] [2023-12-20 08:54:56,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:54:56,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:54:56,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:54:56,620 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) [2023-12-20 08:54:56,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-20 08:54:56,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-20 08:54:56,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:54:56,687 WARN L260 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 120 conjunts are in the unsatisfiable core [2023-12-20 08:54:56,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:54:56,741 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 [2023-12-20 08:54:59,471 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:54:59,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-12-20 08:54:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 08:54:59,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:55:02,617 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 08:55:02,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103876617] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:55:02,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:55:02,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39, 39] total 111 [2023-12-20 08:55:02,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980340205] [2023-12-20 08:55:02,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:55:02,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2023-12-20 08:55:02,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:55:02,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2023-12-20 08:55:02,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=11603, Unknown=2, NotChecked=0, Total=12210 [2023-12-20 08:55:02,621 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 111 states, 111 states have (on average 1.1531531531531531) internal successors, (128), 111 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:55:14,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:55:14,393 INFO L93 Difference]: Finished difference Result 245 states and 286 transitions. [2023-12-20 08:55:14,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2023-12-20 08:55:14,394 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.1531531531531531) internal successors, (128), 111 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-12-20 08:55:14,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:55:14,395 INFO L225 Difference]: With dead ends: 245 [2023-12-20 08:55:14,395 INFO L226 Difference]: Without dead ends: 159 [2023-12-20 08:55:14,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6235 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=2496, Invalid=30082, Unknown=2, NotChecked=0, Total=32580 [2023-12-20 08:55:14,399 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 619 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 4945 mSolverCounterSat, 1250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 6195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1250 IncrementalHoareTripleChecker+Valid, 4945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:55:14,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [619 Valid, 511 Invalid, 6195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1250 Valid, 4945 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-12-20 08:55:14,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-12-20 08:55:14,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 119. [2023-12-20 08:55:14,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.1271186440677967) internal successors, (133), 118 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:55:14,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 133 transitions. [2023-12-20 08:55:14,430 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 133 transitions. Word has length 46 [2023-12-20 08:55:14,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:55:14,430 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 133 transitions. [2023-12-20 08:55:14,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.1531531531531531) internal successors, (128), 111 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:55:14,431 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 133 transitions. [2023-12-20 08:55:14,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-20 08:55:14,431 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:55:14,431 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:55:14,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-20 08:55:14,632 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 [2023-12-20 08:55:14,633 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:55:14,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:55:14,633 INFO L85 PathProgramCache]: Analyzing trace with hash 278717741, now seen corresponding path program 10 times [2023-12-20 08:55:14,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:55:14,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838223640] [2023-12-20 08:55:14,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:55:14,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:55:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:55:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-20 08:55:14,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:55:14,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838223640] [2023-12-20 08:55:14,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838223640] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:55:14,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342153135] [2023-12-20 08:55:14,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:55:14,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:55:14,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:55:14,738 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) [2023-12-20 08:55:14,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-20 08:55:14,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:55:14,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:55:14,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-20 08:55:14,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:55:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-20 08:55:14,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:55:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-20 08:55:14,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342153135] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:55:14,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:55:14,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-12-20 08:55:14,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701490302] [2023-12-20 08:55:14,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:55:14,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-20 08:55:14,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:55:14,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-20 08:55:14,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-12-20 08:55:14,955 INFO L87 Difference]: Start difference. First operand 119 states and 133 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 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) [2023-12-20 08:55:15,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:55:15,139 INFO L93 Difference]: Finished difference Result 195 states and 221 transitions. [2023-12-20 08:55:15,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 08:55:15,139 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-12-20 08:55:15,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:55:15,140 INFO L225 Difference]: With dead ends: 195 [2023-12-20 08:55:15,140 INFO L226 Difference]: Without dead ends: 89 [2023-12-20 08:55:15,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2023-12-20 08:55:15,141 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 67 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:55:15,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 37 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:55:15,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-20 08:55:15,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2023-12-20 08:55:15,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.144736842105263) internal successors, (87), 76 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) [2023-12-20 08:55:15,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2023-12-20 08:55:15,152 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 47 [2023-12-20 08:55:15,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:55:15,152 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2023-12-20 08:55:15,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 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) [2023-12-20 08:55:15,152 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2023-12-20 08:55:15,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-20 08:55:15,153 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:55:15,153 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 08:55:15,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-20 08:55:15,357 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 [2023-12-20 08:55:15,358 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:55:15,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:55:15,358 INFO L85 PathProgramCache]: Analyzing trace with hash 560540332, now seen corresponding path program 11 times [2023-12-20 08:55:15,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:55:15,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759670210] [2023-12-20 08:55:15,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:55:15,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:55:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:55:15,496 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-20 08:55:15,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:55:15,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759670210] [2023-12-20 08:55:15,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759670210] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:55:15,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857959160] [2023-12-20 08:55:15,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:55:15,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:55:15,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:55:15,497 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) [2023-12-20 08:55:15,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-20 08:55:15,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-20 08:55:15,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:55:15,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-20 08:55:15,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:55:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-20 08:55:15,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:55:15,743 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-20 08:55:15,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857959160] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:55:15,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:55:15,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-12-20 08:55:15,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139353120] [2023-12-20 08:55:15,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:55:15,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-20 08:55:15,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:55:15,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-20 08:55:15,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-12-20 08:55:15,744 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:55:15,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:55:15,906 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2023-12-20 08:55:15,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-20 08:55:15,907 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2023-12-20 08:55:15,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:55:15,907 INFO L225 Difference]: With dead ends: 82 [2023-12-20 08:55:15,907 INFO L226 Difference]: Without dead ends: 54 [2023-12-20 08:55:15,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 79 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2023-12-20 08:55:15,908 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:55:15,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 19 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:55:15,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-20 08:55:15,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-12-20 08:55:15,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 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) [2023-12-20 08:55:15,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2023-12-20 08:55:15,915 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 48 [2023-12-20 08:55:15,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:55:15,915 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2023-12-20 08:55:15,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:55:15,916 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2023-12-20 08:55:15,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-20 08:55:15,916 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:55:15,916 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 08:55:15,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-20 08:55:16,116 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 [2023-12-20 08:55:16,117 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:55:16,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:55:16,117 INFO L85 PathProgramCache]: Analyzing trace with hash -129284070, now seen corresponding path program 12 times [2023-12-20 08:55:16,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:55:16,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796101827] [2023-12-20 08:55:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:55:16,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:55:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:55:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 4 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:55:20,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:55:20,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796101827] [2023-12-20 08:55:20,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796101827] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:55:20,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915667282] [2023-12-20 08:55:20,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:55:20,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:55:20,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:55:20,300 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) [2023-12-20 08:55:20,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-20 08:55:20,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-20 08:55:20,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:55:20,370 WARN L260 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 151 conjunts are in the unsatisfiable core [2023-12-20 08:55:20,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:55:20,503 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 [2023-12-20 08:55:23,944 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:55:23,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-12-20 08:55:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:55:24,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:55:28,513 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 52 treesize of output 44 [2023-12-20 08:55:28,537 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:55:28,538 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 135 treesize of output 95 [2023-12-20 08:55:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:55:28,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915667282] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:55:28,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:55:28,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 52] total 139 [2023-12-20 08:55:28,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069879452] [2023-12-20 08:55:28,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:55:28,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2023-12-20 08:55:28,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:55:28,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2023-12-20 08:55:28,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=18416, Unknown=1, NotChecked=0, Total=19182 [2023-12-20 08:55:28,999 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 139 states, 139 states have (on average 1.0863309352517985) internal successors, (151), 139 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:55:49,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:55:49,080 INFO L93 Difference]: Finished difference Result 266 states and 306 transitions. [2023-12-20 08:55:49,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2023-12-20 08:55:49,080 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 1.0863309352517985) internal successors, (151), 139 states have internal predecessors, (151), 0 states have call successors, (0), 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 53 [2023-12-20 08:55:49,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:55:49,081 INFO L225 Difference]: With dead ends: 266 [2023-12-20 08:55:49,081 INFO L226 Difference]: Without dead ends: 178 [2023-12-20 08:55:49,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16928 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=4438, Invalid=62383, Unknown=1, NotChecked=0, Total=66822 [2023-12-20 08:55:49,085 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 335 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 7666 mSolverCounterSat, 1032 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 8698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1032 IncrementalHoareTripleChecker+Valid, 7666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:55:49,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 573 Invalid, 8698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1032 Valid, 7666 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-12-20 08:55:49,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-12-20 08:55:49,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 94. [2023-12-20 08:55:49,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.1505376344086022) internal successors, (107), 93 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) [2023-12-20 08:55:49,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2023-12-20 08:55:49,105 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 53 [2023-12-20 08:55:49,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:55:49,105 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2023-12-20 08:55:49,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 1.0863309352517985) internal successors, (151), 139 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:55:49,106 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2023-12-20 08:55:49,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-20 08:55:49,106 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:55:49,106 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:55:49,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-20 08:55:49,308 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 [2023-12-20 08:55:49,308 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:55:49,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:55:49,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1913890797, now seen corresponding path program 13 times [2023-12-20 08:55:49,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:55:49,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772784554] [2023-12-20 08:55:49,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:55:49,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:55:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:55:49,438 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-20 08:55:49,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:55:49,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772784554] [2023-12-20 08:55:49,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772784554] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:55:49,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508543011] [2023-12-20 08:55:49,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 08:55:49,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:55:49,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:55:49,439 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) [2023-12-20 08:55:49,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-20 08:55:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:55:49,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-20 08:55:49,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:55:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-20 08:55:49,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:55:49,669 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-20 08:55:49,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508543011] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:55:49,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:55:49,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-12-20 08:55:49,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462823720] [2023-12-20 08:55:49,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:55:49,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-20 08:55:49,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:55:49,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-20 08:55:49,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-12-20 08:55:49,670 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:55:49,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:55:49,869 INFO L93 Difference]: Finished difference Result 131 states and 152 transitions. [2023-12-20 08:55:49,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 08:55:49,869 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-12-20 08:55:49,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:55:49,869 INFO L225 Difference]: With dead ends: 131 [2023-12-20 08:55:49,869 INFO L226 Difference]: Without dead ends: 61 [2023-12-20 08:55:49,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2023-12-20 08:55:49,870 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 51 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:55:49,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 25 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:55:49,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-20 08:55:49,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-12-20 08:55:49,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:55:49,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2023-12-20 08:55:49,890 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 55 [2023-12-20 08:55:49,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:55:49,891 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2023-12-20 08:55:49,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:55:49,891 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2023-12-20 08:55:49,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-20 08:55:49,892 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:55:49,892 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 08:55:49,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-20 08:55:50,096 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 [2023-12-20 08:55:50,098 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:55:50,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:55:50,098 INFO L85 PathProgramCache]: Analyzing trace with hash 425031776, now seen corresponding path program 14 times [2023-12-20 08:55:50,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:55:50,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637091035] [2023-12-20 08:55:50,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:55:50,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:55:50,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:55:55,979 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 9 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:55:55,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:55:55,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637091035] [2023-12-20 08:55:55,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637091035] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:55:55,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024380791] [2023-12-20 08:55:55,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:55:55,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:55:55,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:55:55,981 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) [2023-12-20 08:55:55,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-20 08:55:56,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:55:56,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:55:56,059 WARN L260 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 168 conjunts are in the unsatisfiable core [2023-12-20 08:55:56,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:55:56,240 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 [2023-12-20 08:55:58,766 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:55:58,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:56:02,622 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-20 08:56:02,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024380791] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:56:02,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:56:02,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 47, 43] total 136 [2023-12-20 08:56:02,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945375099] [2023-12-20 08:56:02,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:56:02,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2023-12-20 08:56:02,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:56:02,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2023-12-20 08:56:02,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=17858, Unknown=0, NotChecked=0, Total=18360 [2023-12-20 08:56:02,625 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 136 states, 136 states have (on average 1.213235294117647) internal successors, (165), 136 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:56:14,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:56:14,830 INFO L93 Difference]: Finished difference Result 146 states and 167 transitions. [2023-12-20 08:56:14,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-12-20 08:56:14,830 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 1.213235294117647) internal successors, (165), 136 states have internal predecessors, (165), 0 states have call successors, (0), 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 [2023-12-20 08:56:14,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:56:14,831 INFO L225 Difference]: With dead ends: 146 [2023-12-20 08:56:14,831 INFO L226 Difference]: Without dead ends: 140 [2023-12-20 08:56:14,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11859 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=2089, Invalid=42643, Unknown=0, NotChecked=0, Total=44732 [2023-12-20 08:56:14,833 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 278 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 8292 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 8995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 8292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:56:14,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 425 Invalid, 8995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 8292 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-12-20 08:56:14,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-12-20 08:56:14,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 80. [2023-12-20 08:56:14,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 79 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:56:14,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2023-12-20 08:56:14,863 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 60 [2023-12-20 08:56:14,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:56:14,863 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2023-12-20 08:56:14,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 1.213235294117647) internal successors, (165), 136 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:56:14,864 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2023-12-20 08:56:14,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-20 08:56:14,864 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:56:14,864 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:56:14,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-20 08:56:15,064 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 [2023-12-20 08:56:15,065 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:56:15,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:56:15,065 INFO L85 PathProgramCache]: Analyzing trace with hash 319471154, now seen corresponding path program 15 times [2023-12-20 08:56:15,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:56:15,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076249225] [2023-12-20 08:56:15,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:56:15,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:56:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:56:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-12-20 08:56:15,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:56:15,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076249225] [2023-12-20 08:56:15,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076249225] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:56:15,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93454095] [2023-12-20 08:56:15,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:56:15,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:56:15,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:56:15,239 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) [2023-12-20 08:56:15,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-20 08:56:15,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-20 08:56:15,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:56:15,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-20 08:56:15,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:56:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-12-20 08:56:15,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:56:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-12-20 08:56:15,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93454095] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:56:15,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:56:15,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-12-20 08:56:15,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016756208] [2023-12-20 08:56:15,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:56:15,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-20 08:56:15,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:56:15,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-20 08:56:15,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-12-20 08:56:15,594 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 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) [2023-12-20 08:56:15,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:56:15,919 INFO L93 Difference]: Finished difference Result 208 states and 234 transitions. [2023-12-20 08:56:15,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-20 08:56:15,919 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 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 61 [2023-12-20 08:56:15,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:56:15,920 INFO L225 Difference]: With dead ends: 208 [2023-12-20 08:56:15,920 INFO L226 Difference]: Without dead ends: 93 [2023-12-20 08:56:15,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-12-20 08:56:15,921 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 76 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:56:15,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 34 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:56:15,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-12-20 08:56:15,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2023-12-20 08:56:15,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 82 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:56:15,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2023-12-20 08:56:15,956 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 61 [2023-12-20 08:56:15,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:56:15,956 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2023-12-20 08:56:15,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 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) [2023-12-20 08:56:15,957 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2023-12-20 08:56:15,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-20 08:56:15,957 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:56:15,957 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:56:15,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-20 08:56:16,159 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 [2023-12-20 08:56:16,159 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:56:16,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:56:16,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1429024510, now seen corresponding path program 16 times [2023-12-20 08:56:16,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:56:16,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626616685] [2023-12-20 08:56:16,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:56:16,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:56:16,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:56:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-12-20 08:56:16,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:56:16,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626616685] [2023-12-20 08:56:16,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626616685] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:56:16,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236503473] [2023-12-20 08:56:16,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:56:16,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:56:16,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:56:16,334 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) [2023-12-20 08:56:16,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-20 08:56:16,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:56:16,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:56:16,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-20 08:56:16,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:56:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-12-20 08:56:16,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:56:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-12-20 08:56:16,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236503473] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:56:16,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:56:16,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-12-20 08:56:16,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477510090] [2023-12-20 08:56:16,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:56:16,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-20 08:56:16,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:56:16,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-20 08:56:16,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-12-20 08:56:16,653 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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) [2023-12-20 08:56:16,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:56:16,911 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2023-12-20 08:56:16,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-20 08:56:16,911 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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 64 [2023-12-20 08:56:16,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:56:16,912 INFO L225 Difference]: With dead ends: 88 [2023-12-20 08:56:16,912 INFO L226 Difference]: Without dead ends: 68 [2023-12-20 08:56:16,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 106 SyntacticMatches, 14 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2023-12-20 08:56:16,912 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:56:16,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 25 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:56:16,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-20 08:56:16,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-12-20 08:56:16,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:56:16,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2023-12-20 08:56:16,938 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 64 [2023-12-20 08:56:16,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:56:16,938 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2023-12-20 08:56:16,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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) [2023-12-20 08:56:16,938 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2023-12-20 08:56:16,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-20 08:56:16,938 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:56:16,938 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 08:56:16,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-20 08:56:17,139 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 [2023-12-20 08:56:17,139 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:56:17,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:56:17,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1828108634, now seen corresponding path program 17 times [2023-12-20 08:56:17,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:56:17,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173826453] [2023-12-20 08:56:17,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:56:17,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:56:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:56:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 2 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:56:22,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:56:22,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173826453] [2023-12-20 08:56:22,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173826453] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:56:22,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457838383] [2023-12-20 08:56:22,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:56:22,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:56:22,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:56:22,940 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) [2023-12-20 08:56:22,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-20 08:56:23,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-20 08:56:23,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:56:23,103 WARN L260 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 202 conjunts are in the unsatisfiable core [2023-12-20 08:56:23,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:56:23,166 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 [2023-12-20 08:56:23,214 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 [2023-12-20 08:56:23,259 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 [2023-12-20 08:56:23,304 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 [2023-12-20 08:56:23,349 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 [2023-12-20 08:56:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:56:26,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:56:30,945 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-20 08:56:30,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457838383] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:56:30,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:56:30,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 54, 49] total 156 [2023-12-20 08:56:30,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231025074] [2023-12-20 08:56:30,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:56:30,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2023-12-20 08:56:30,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:56:30,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2023-12-20 08:56:30,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=23346, Unknown=0, NotChecked=0, Total=24180 [2023-12-20 08:56:30,948 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 156 states, 156 states have (on average 1.185897435897436) internal successors, (185), 156 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:56:45,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:56:45,642 INFO L93 Difference]: Finished difference Result 256 states and 286 transitions. [2023-12-20 08:56:45,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2023-12-20 08:56:45,643 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 1.185897435897436) internal successors, (185), 156 states have internal predecessors, (185), 0 states have call successors, (0), 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 67 [2023-12-20 08:56:45,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:56:45,643 INFO L225 Difference]: With dead ends: 256 [2023-12-20 08:56:45,643 INFO L226 Difference]: Without dead ends: 232 [2023-12-20 08:56:45,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20556 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=2568, Invalid=58688, Unknown=0, NotChecked=0, Total=61256 [2023-12-20 08:56:45,646 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 129 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 8823 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 9347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 8823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-12-20 08:56:45,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 476 Invalid, 9347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 8823 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-12-20 08:56:45,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-12-20 08:56:45,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 119. [2023-12-20 08:56:45,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.11864406779661) internal successors, (132), 118 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) [2023-12-20 08:56:45,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 132 transitions. [2023-12-20 08:56:45,699 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 132 transitions. Word has length 67 [2023-12-20 08:56:45,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:56:45,699 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 132 transitions. [2023-12-20 08:56:45,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 1.185897435897436) internal successors, (185), 156 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:56:45,699 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 132 transitions. [2023-12-20 08:56:45,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-20 08:56:45,700 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:56:45,700 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:56:45,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-20 08:56:45,905 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 [2023-12-20 08:56:45,906 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:56:45,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:56:45,906 INFO L85 PathProgramCache]: Analyzing trace with hash 865180792, now seen corresponding path program 18 times [2023-12-20 08:56:45,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:56:45,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359305009] [2023-12-20 08:56:45,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:56:45,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:56:45,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:56:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-12-20 08:56:46,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:56:46,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359305009] [2023-12-20 08:56:46,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359305009] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:56:46,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382337472] [2023-12-20 08:56:46,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:56:46,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:56:46,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:56:46,102 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) [2023-12-20 08:56:46,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-20 08:56:46,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-20 08:56:46,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:56:46,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-20 08:56:46,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:56:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-12-20 08:56:46,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:56:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-12-20 08:56:46,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382337472] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:56:46,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:56:46,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-12-20 08:56:46,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576166475] [2023-12-20 08:56:46,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:56:46,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-20 08:56:46,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:56:46,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-20 08:56:46,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-12-20 08:56:46,505 INFO L87 Difference]: Start difference. First operand 119 states and 132 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 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) [2023-12-20 08:56:46,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:56:46,885 INFO L93 Difference]: Finished difference Result 238 states and 264 transitions. [2023-12-20 08:56:46,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-20 08:56:46,885 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 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 68 [2023-12-20 08:56:46,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:56:46,886 INFO L225 Difference]: With dead ends: 238 [2023-12-20 08:56:46,886 INFO L226 Difference]: Without dead ends: 102 [2023-12-20 08:56:46,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 111 SyntacticMatches, 15 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2023-12-20 08:56:46,887 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 122 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:56:46,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 34 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:56:46,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-12-20 08:56:46,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2023-12-20 08:56:46,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.098901098901099) internal successors, (100), 91 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:56:46,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2023-12-20 08:56:46,936 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 68 [2023-12-20 08:56:46,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:56:46,936 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2023-12-20 08:56:46,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 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) [2023-12-20 08:56:46,936 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2023-12-20 08:56:46,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-20 08:56:46,937 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:56:46,937 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:56:46,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-20 08:56:47,137 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 [2023-12-20 08:56:47,137 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:56:47,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:56:47,137 INFO L85 PathProgramCache]: Analyzing trace with hash 929851516, now seen corresponding path program 19 times [2023-12-20 08:56:47,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:56:47,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829268773] [2023-12-20 08:56:47,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:56:47,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:56:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:56:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2023-12-20 08:56:47,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:56:47,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829268773] [2023-12-20 08:56:47,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829268773] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:56:47,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962357263] [2023-12-20 08:56:47,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 08:56:47,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:56:47,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:56:47,318 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) [2023-12-20 08:56:47,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-20 08:56:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:56:47,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-20 08:56:47,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:56:47,545 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2023-12-20 08:56:47,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:56:47,672 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2023-12-20 08:56:47,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962357263] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:56:47,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:56:47,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-12-20 08:56:47,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857821660] [2023-12-20 08:56:47,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:56:47,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-20 08:56:47,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:56:47,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-20 08:56:47,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-12-20 08:56:47,673 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 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) [2023-12-20 08:56:47,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:56:47,977 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2023-12-20 08:56:47,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-20 08:56:47,979 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 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 71 [2023-12-20 08:56:47,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:56:47,979 INFO L225 Difference]: With dead ends: 97 [2023-12-20 08:56:47,979 INFO L226 Difference]: Without dead ends: 75 [2023-12-20 08:56:47,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 116 SyntacticMatches, 16 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=346, Invalid=1136, Unknown=0, NotChecked=0, Total=1482 [2023-12-20 08:56:47,980 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:56:47,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 31 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:56:47,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-20 08:56:48,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-12-20 08:56:48,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 74 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) [2023-12-20 08:56:48,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2023-12-20 08:56:48,014 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 71 [2023-12-20 08:56:48,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:56:48,015 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2023-12-20 08:56:48,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 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) [2023-12-20 08:56:48,015 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2023-12-20 08:56:48,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-20 08:56:48,015 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:56:48,015 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 08:56:48,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-20 08:56:48,215 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 [2023-12-20 08:56:48,216 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:56:48,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:56:48,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1123611168, now seen corresponding path program 20 times [2023-12-20 08:56:48,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:56:48,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326466701] [2023-12-20 08:56:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:56:48,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:56:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:56:55,815 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 10 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:56:55,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:56:55,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326466701] [2023-12-20 08:56:55,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326466701] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:56:55,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314897979] [2023-12-20 08:56:55,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:56:55,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:56:55,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:56:55,816 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) [2023-12-20 08:56:55,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-20 08:56:55,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:56:55,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:56:55,912 WARN L260 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 220 conjunts are in the unsatisfiable core [2023-12-20 08:56:55,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:56:56,220 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 [2023-12-20 08:57:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:57:00,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:57:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-20 08:57:06,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314897979] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:57:06,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:57:06,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 61, 55] total 176 [2023-12-20 08:57:06,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539538555] [2023-12-20 08:57:06,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:57:06,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2023-12-20 08:57:06,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:57:06,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2023-12-20 08:57:06,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=914, Invalid=29886, Unknown=0, NotChecked=0, Total=30800 [2023-12-20 08:57:06,649 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 176 states, 176 states have (on average 1.1647727272727273) internal successors, (205), 176 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:57:25,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:57:25,834 INFO L93 Difference]: Finished difference Result 281 states and 311 transitions. [2023-12-20 08:57:25,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2023-12-20 08:57:25,834 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 1.1647727272727273) internal successors, (205), 176 states have internal predecessors, (205), 0 states have call successors, (0), 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 74 [2023-12-20 08:57:25,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:57:25,835 INFO L225 Difference]: With dead ends: 281 [2023-12-20 08:57:25,835 INFO L226 Difference]: Without dead ends: 255 [2023-12-20 08:57:25,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24750 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=3030, Invalid=73976, Unknown=0, NotChecked=0, Total=77006 [2023-12-20 08:57:25,838 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 135 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 10074 mSolverCounterSat, 580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 10654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 580 IncrementalHoareTripleChecker+Valid, 10074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-12-20 08:57:25,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 458 Invalid, 10654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [580 Valid, 10074 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-12-20 08:57:25,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2023-12-20 08:57:25,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 131. [2023-12-20 08:57:25,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.1076923076923078) internal successors, (144), 130 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) [2023-12-20 08:57:25,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2023-12-20 08:57:25,940 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 74 [2023-12-20 08:57:25,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:57:25,940 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2023-12-20 08:57:25,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 1.1647727272727273) internal successors, (205), 176 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:57:25,941 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2023-12-20 08:57:25,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-20 08:57:25,941 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:57:25,941 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:57:25,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-20 08:57:26,141 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 [2023-12-20 08:57:26,142 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:57:26,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:57:26,142 INFO L85 PathProgramCache]: Analyzing trace with hash 500595826, now seen corresponding path program 21 times [2023-12-20 08:57:26,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:57:26,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875951191] [2023-12-20 08:57:26,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:57:26,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:57:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:57:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-12-20 08:57:26,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:57:26,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875951191] [2023-12-20 08:57:26,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875951191] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:57:26,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684731924] [2023-12-20 08:57:26,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:57:26,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:57:26,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:57:26,363 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) [2023-12-20 08:57:26,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-20 08:57:26,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-20 08:57:26,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:57:26,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-20 08:57:26,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:57:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-12-20 08:57:26,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:57:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-12-20 08:57:26,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684731924] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:57:26,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:57:26,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-12-20 08:57:26,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057910316] [2023-12-20 08:57:26,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:57:26,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-20 08:57:26,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:57:26,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-20 08:57:26,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-12-20 08:57:26,832 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:57:27,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:57:27,257 INFO L93 Difference]: Finished difference Result 261 states and 287 transitions. [2023-12-20 08:57:27,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-20 08:57:27,258 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 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 75 [2023-12-20 08:57:27,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:57:27,258 INFO L225 Difference]: With dead ends: 261 [2023-12-20 08:57:27,258 INFO L226 Difference]: Without dead ends: 111 [2023-12-20 08:57:27,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 131 SyntacticMatches, 17 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2023-12-20 08:57:27,259 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 58 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:57:27,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 40 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:57:27,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-12-20 08:57:27,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 101. [2023-12-20 08:57:27,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.09) internal successors, (109), 100 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) [2023-12-20 08:57:27,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2023-12-20 08:57:27,328 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 75 [2023-12-20 08:57:27,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:57:27,328 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2023-12-20 08:57:27,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:57:27,328 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2023-12-20 08:57:27,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-20 08:57:27,328 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:57:27,328 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:57:27,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-20 08:57:27,532 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 [2023-12-20 08:57:27,532 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:57:27,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:57:27,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1390452030, now seen corresponding path program 22 times [2023-12-20 08:57:27,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:57:27,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504840946] [2023-12-20 08:57:27,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:57:27,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:57:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:57:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2023-12-20 08:57:27,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:57:27,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504840946] [2023-12-20 08:57:27,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504840946] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:57:27,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82832287] [2023-12-20 08:57:27,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:57:27,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:57:27,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:57:27,752 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) [2023-12-20 08:57:27,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-20 08:57:27,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:57:27,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:57:27,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-20 08:57:27,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:57:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2023-12-20 08:57:27,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:57:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2023-12-20 08:57:28,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82832287] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:57:28,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:57:28,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-12-20 08:57:28,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280918441] [2023-12-20 08:57:28,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:57:28,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-20 08:57:28,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:57:28,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-20 08:57:28,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-12-20 08:57:28,152 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:57:28,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:57:28,511 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2023-12-20 08:57:28,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-20 08:57:28,511 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2023-12-20 08:57:28,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:57:28,512 INFO L225 Difference]: With dead ends: 106 [2023-12-20 08:57:28,512 INFO L226 Difference]: Without dead ends: 82 [2023-12-20 08:57:28,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 128 SyntacticMatches, 18 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=418, Invalid=1388, Unknown=0, NotChecked=0, Total=1806 [2023-12-20 08:57:28,513 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:57:28,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 22 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:57:28,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-20 08:57:28,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-12-20 08:57:28,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 81 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:57:28,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2023-12-20 08:57:28,559 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 78 [2023-12-20 08:57:28,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:57:28,560 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2023-12-20 08:57:28,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:57:28,560 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2023-12-20 08:57:28,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-20 08:57:28,560 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:57:28,560 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 08:57:28,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-20 08:57:28,762 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 [2023-12-20 08:57:28,763 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:57:28,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:57:28,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1975351962, now seen corresponding path program 23 times [2023-12-20 08:57:28,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:57:28,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314528396] [2023-12-20 08:57:28,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:57:28,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:57:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:57:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 15 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:57:38,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:57:38,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314528396] [2023-12-20 08:57:38,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314528396] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:57:38,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281809659] [2023-12-20 08:57:38,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:57:38,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:57:38,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:57:38,768 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) [2023-12-20 08:57:38,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-20 08:57:39,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-20 08:57:39,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:57:39,058 WARN L260 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 246 conjunts are in the unsatisfiable core [2023-12-20 08:57:39,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:57:39,436 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 [2023-12-20 08:57:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:57:44,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:57:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-20 08:57:53,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281809659] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:57:53,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:57:53,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 68, 61] total 196 [2023-12-20 08:57:53,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153481875] [2023-12-20 08:57:53,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:57:53,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 196 states [2023-12-20 08:57:53,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:57:53,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2023-12-20 08:57:53,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1269, Invalid=36951, Unknown=0, NotChecked=0, Total=38220 [2023-12-20 08:57:53,145 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 196 states, 196 states have (on average 1.1479591836734695) internal successors, (225), 196 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:58:15,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:58:15,917 INFO L93 Difference]: Finished difference Result 306 states and 336 transitions. [2023-12-20 08:58:15,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2023-12-20 08:58:15,918 INFO L78 Accepts]: Start accepts. Automaton has has 196 states, 196 states have (on average 1.1479591836734695) internal successors, (225), 196 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2023-12-20 08:58:15,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:58:15,919 INFO L225 Difference]: With dead ends: 306 [2023-12-20 08:58:15,920 INFO L226 Difference]: Without dead ends: 278 [2023-12-20 08:58:15,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32391 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=3943, Invalid=91229, Unknown=0, NotChecked=0, Total=95172 [2023-12-20 08:58:15,924 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 167 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 11916 mSolverCounterSat, 813 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 12729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 813 IncrementalHoareTripleChecker+Valid, 11916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:58:15,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 535 Invalid, 12729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [813 Valid, 11916 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-12-20 08:58:15,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2023-12-20 08:58:16,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 143. [2023-12-20 08:58:16,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0985915492957747) internal successors, (156), 142 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) [2023-12-20 08:58:16,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 156 transitions. [2023-12-20 08:58:16,040 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 156 transitions. Word has length 81 [2023-12-20 08:58:16,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:58:16,040 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 156 transitions. [2023-12-20 08:58:16,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 196 states, 196 states have (on average 1.1479591836734695) internal successors, (225), 196 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:58:16,041 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 156 transitions. [2023-12-20 08:58:16,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-20 08:58:16,041 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:58:16,041 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:58:16,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-20 08:58:16,245 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 [2023-12-20 08:58:16,245 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:58:16,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:58:16,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1134756664, now seen corresponding path program 24 times [2023-12-20 08:58:16,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:58:16,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725564043] [2023-12-20 08:58:16,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:58:16,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:58:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:58:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-12-20 08:58:16,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:58:16,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725564043] [2023-12-20 08:58:16,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725564043] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:58:16,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247788852] [2023-12-20 08:58:16,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:58:16,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:58:16,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:58:16,527 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) [2023-12-20 08:58:16,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-20 08:58:16,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-12-20 08:58:16,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:58:16,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-20 08:58:16,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:58:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-12-20 08:58:16,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:58:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-12-20 08:58:17,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247788852] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:58:17,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:58:17,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-12-20 08:58:17,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347034440] [2023-12-20 08:58:17,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:58:17,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-20 08:58:17,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:58:17,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-20 08:58:17,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2023-12-20 08:58:17,118 INFO L87 Difference]: Start difference. First operand 143 states and 156 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 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) [2023-12-20 08:58:17,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:58:17,728 INFO L93 Difference]: Finished difference Result 284 states and 310 transitions. [2023-12-20 08:58:17,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-20 08:58:17,729 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 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 82 [2023-12-20 08:58:17,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:58:17,729 INFO L225 Difference]: With dead ends: 284 [2023-12-20 08:58:17,729 INFO L226 Difference]: Without dead ends: 120 [2023-12-20 08:58:17,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 133 SyntacticMatches, 19 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2023-12-20 08:58:17,730 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 67 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 08:58:17,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 34 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 08:58:17,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-12-20 08:58:17,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2023-12-20 08:58:17,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0825688073394495) internal successors, (118), 109 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:58:17,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2023-12-20 08:58:17,830 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 82 [2023-12-20 08:58:17,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:58:17,830 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2023-12-20 08:58:17,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 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) [2023-12-20 08:58:17,830 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2023-12-20 08:58:17,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-20 08:58:17,831 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:58:17,831 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:58:17,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-20 08:58:18,036 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 [2023-12-20 08:58:18,037 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:58:18,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:58:18,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1840979524, now seen corresponding path program 25 times [2023-12-20 08:58:18,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:58:18,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360474724] [2023-12-20 08:58:18,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:58:18,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:58:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:58:18,314 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-12-20 08:58:18,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:58:18,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360474724] [2023-12-20 08:58:18,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360474724] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:58:18,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390153767] [2023-12-20 08:58:18,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 08:58:18,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:58:18,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:58:18,315 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) [2023-12-20 08:58:18,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-20 08:58:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:58:18,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-20 08:58:18,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:58:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-12-20 08:58:18,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:58:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-12-20 08:58:18,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390153767] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:58:18,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:58:18,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-12-20 08:58:18,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279779355] [2023-12-20 08:58:18,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:58:18,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-20 08:58:18,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:58:18,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-20 08:58:18,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2023-12-20 08:58:18,799 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 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) [2023-12-20 08:58:19,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:58:19,172 INFO L93 Difference]: Finished difference Result 115 states and 123 transitions. [2023-12-20 08:58:19,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-20 08:58:19,173 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 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 85 [2023-12-20 08:58:19,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:58:19,173 INFO L225 Difference]: With dead ends: 115 [2023-12-20 08:58:19,173 INFO L226 Difference]: Without dead ends: 89 [2023-12-20 08:58:19,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 138 SyntacticMatches, 20 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=497, Invalid=1665, Unknown=0, NotChecked=0, Total=2162 [2023-12-20 08:58:19,174 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:58:19,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 19 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:58:19,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-20 08:58:19,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-12-20 08:58:19,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0795454545454546) internal successors, (95), 88 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:58:19,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2023-12-20 08:58:19,234 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 85 [2023-12-20 08:58:19,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:58:19,234 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2023-12-20 08:58:19,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 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) [2023-12-20 08:58:19,234 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2023-12-20 08:58:19,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-20 08:58:19,235 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:58:19,235 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 08:58:19,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-12-20 08:58:19,435 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 [2023-12-20 08:58:19,435 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:58:19,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:58:19,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1370266592, now seen corresponding path program 26 times [2023-12-20 08:58:19,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:58:19,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409312592] [2023-12-20 08:58:19,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:58:19,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:58:19,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:58:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 49 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:58:32,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:58:32,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409312592] [2023-12-20 08:58:32,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409312592] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:58:32,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194753013] [2023-12-20 08:58:32,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:58:32,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:58:32,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:58:32,338 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) [2023-12-20 08:58:32,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-20 08:58:32,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:58:32,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:58:32,474 WARN L260 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 272 conjunts are in the unsatisfiable core [2023-12-20 08:58:32,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:58:33,003 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 [2023-12-20 08:58:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:58:40,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:58:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-20 08:58:53,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194753013] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:58:53,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:58:53,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 75, 67] total 216 [2023-12-20 08:58:53,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840526727] [2023-12-20 08:58:53,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:58:53,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 216 states [2023-12-20 08:58:53,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:58:53,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2023-12-20 08:58:53,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=958, Invalid=45482, Unknown=0, NotChecked=0, Total=46440 [2023-12-20 08:58:53,301 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 216 states, 216 states have (on average 1.1342592592592593) internal successors, (245), 216 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:59:26,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:59:26,236 INFO L93 Difference]: Finished difference Result 206 states and 227 transitions. [2023-12-20 08:59:26,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-12-20 08:59:26,237 INFO L78 Accepts]: Start accepts. Automaton has has 216 states, 216 states have (on average 1.1342592592592593) internal successors, (245), 216 states have internal predecessors, (245), 0 states have call successors, (0), 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 88 [2023-12-20 08:59:26,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:59:26,237 INFO L225 Difference]: With dead ends: 206 [2023-12-20 08:59:26,237 INFO L226 Difference]: Without dead ends: 200 [2023-12-20 08:59:26,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29849 ImplicationChecksByTransitivity, 45.8s TimeCoverageRelationStatistics Valid=4232, Invalid=105660, Unknown=0, NotChecked=0, Total=109892 [2023-12-20 08:59:26,241 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 287 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 18717 mSolverCounterSat, 1233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 19950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1233 IncrementalHoareTripleChecker+Valid, 18717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2023-12-20 08:59:26,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 625 Invalid, 19950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1233 Valid, 18717 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2023-12-20 08:59:26,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-12-20 08:59:26,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 116. [2023-12-20 08:59:26,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0869565217391304) internal successors, (125), 115 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) [2023-12-20 08:59:26,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2023-12-20 08:59:26,338 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 88 [2023-12-20 08:59:26,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:59:26,338 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2023-12-20 08:59:26,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 216 states, 216 states have (on average 1.1342592592592593) internal successors, (245), 216 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:59:26,339 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2023-12-20 08:59:26,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-20 08:59:26,339 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:59:26,339 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:59:26,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-20 08:59:26,545 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 [2023-12-20 08:59:26,545 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:59:26,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:59:26,545 INFO L85 PathProgramCache]: Analyzing trace with hash -443020622, now seen corresponding path program 27 times [2023-12-20 08:59:26,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:59:26,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467932590] [2023-12-20 08:59:26,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:59:26,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:59:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:59:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-12-20 08:59:26,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:59:26,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467932590] [2023-12-20 08:59:26,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467932590] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:59:26,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461385013] [2023-12-20 08:59:26,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:59:26,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:59:26,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:59:26,835 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) [2023-12-20 08:59:26,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-20 08:59:27,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-20 08:59:27,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:59:27,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-20 08:59:27,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:59:27,231 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-12-20 08:59:27,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:59:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-12-20 08:59:27,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461385013] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:59:27,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:59:27,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2023-12-20 08:59:27,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651859599] [2023-12-20 08:59:27,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:59:27,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-20 08:59:27,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:59:27,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-20 08:59:27,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2023-12-20 08:59:27,398 INFO L87 Difference]: Start difference. First operand 116 states and 125 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 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) [2023-12-20 08:59:28,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:59:28,149 INFO L93 Difference]: Finished difference Result 296 states and 322 transitions. [2023-12-20 08:59:28,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-20 08:59:28,149 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 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 89 [2023-12-20 08:59:28,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:59:28,149 INFO L225 Difference]: With dead ends: 296 [2023-12-20 08:59:28,150 INFO L226 Difference]: Without dead ends: 129 [2023-12-20 08:59:28,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 155 SyntacticMatches, 21 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=572, Invalid=1780, Unknown=0, NotChecked=0, Total=2352 [2023-12-20 08:59:28,150 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 64 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 568 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 08:59:28,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 40 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [568 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 08:59:28,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-12-20 08:59:28,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 119. [2023-12-20 08:59:28,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.076271186440678) internal successors, (127), 118 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:59:28,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2023-12-20 08:59:28,254 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 89 [2023-12-20 08:59:28,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:59:28,254 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2023-12-20 08:59:28,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 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) [2023-12-20 08:59:28,254 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2023-12-20 08:59:28,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-20 08:59:28,255 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:59:28,255 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:59:28,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-20 08:59:28,460 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 [2023-12-20 08:59:28,461 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:59:28,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:59:28,461 INFO L85 PathProgramCache]: Analyzing trace with hash 252781698, now seen corresponding path program 28 times [2023-12-20 08:59:28,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:59:28,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910239142] [2023-12-20 08:59:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:59:28,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:59:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:59:28,771 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2023-12-20 08:59:28,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:59:28,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910239142] [2023-12-20 08:59:28,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910239142] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:59:28,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709966129] [2023-12-20 08:59:28,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:59:28,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:59:28,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:59:28,772 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) [2023-12-20 08:59:28,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-20 08:59:28,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:59:28,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:59:28,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-20 08:59:28,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:59:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2023-12-20 08:59:29,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:59:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2023-12-20 08:59:29,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709966129] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:59:29,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:59:29,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2023-12-20 08:59:29,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653092079] [2023-12-20 08:59:29,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:59:29,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-20 08:59:29,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:59:29,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-20 08:59:29,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2023-12-20 08:59:29,250 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:59:29,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:59:29,677 INFO L93 Difference]: Finished difference Result 124 states and 132 transitions. [2023-12-20 08:59:29,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-20 08:59:29,677 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2023-12-20 08:59:29,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:59:29,686 INFO L225 Difference]: With dead ends: 124 [2023-12-20 08:59:29,686 INFO L226 Difference]: Without dead ends: 96 [2023-12-20 08:59:29,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 150 SyntacticMatches, 22 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=583, Invalid=1967, Unknown=0, NotChecked=0, Total=2550 [2023-12-20 08:59:29,689 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:59:29,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 22 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 08:59:29,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-12-20 08:59:29,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-12-20 08:59:29,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0736842105263158) internal successors, (102), 95 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:59:29,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2023-12-20 08:59:29,762 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 92 [2023-12-20 08:59:29,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:59:29,763 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2023-12-20 08:59:29,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:59:29,763 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2023-12-20 08:59:29,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-20 08:59:29,763 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:59:29,763 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 08:59:29,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-12-20 08:59:29,968 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 [2023-12-20 08:59:29,968 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:59:29,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:59:29,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1083470886, now seen corresponding path program 29 times [2023-12-20 08:59:29,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:59:29,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124175726] [2023-12-20 08:59:29,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:59:29,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:59:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:59:45,608 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 51 proven. 411 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:59:45,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:59:45,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124175726] [2023-12-20 08:59:45,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124175726] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:59:45,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463576992] [2023-12-20 08:59:45,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:59:45,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:59:45,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:59:45,610 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:59:45,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-20 08:59:45,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-20 08:59:45,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:59:45,999 WARN L260 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 306 conjunts are in the unsatisfiable core [2023-12-20 08:59:46,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:59:46,360 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 [2023-12-20 08:59:46,435 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 [2023-12-20 08:59:46,513 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 [2023-12-20 08:59:46,589 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 [2023-12-20 08:59:46,668 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 [2023-12-20 08:59:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:59:56,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:00:13,825 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-20 09:00:13,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463576992] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:00:13,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:00:13,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 82, 73] total 236 [2023-12-20 09:00:13,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708133390] [2023-12-20 09:00:13,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:00:13,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 236 states [2023-12-20 09:00:13,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:00:13,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 236 interpolants. [2023-12-20 09:00:13,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1003, Invalid=54457, Unknown=0, NotChecked=0, Total=55460 [2023-12-20 09:00:13,829 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 236 states, 236 states have (on average 1.1228813559322033) internal successors, (265), 236 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:00:55,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:00:55,447 INFO L93 Difference]: Finished difference Result 221 states and 242 transitions. [2023-12-20 09:00:55,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2023-12-20 09:00:55,447 INFO L78 Accepts]: Start accepts. Automaton has has 236 states, 236 states have (on average 1.1228813559322033) internal successors, (265), 236 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2023-12-20 09:00:55,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:00:55,448 INFO L225 Difference]: With dead ends: 221 [2023-12-20 09:00:55,448 INFO L226 Difference]: Without dead ends: 215 [2023-12-20 09:00:55,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 358 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32863 ImplicationChecksByTransitivity, 60.2s TimeCoverageRelationStatistics Valid=4747, Invalid=124493, Unknown=0, NotChecked=0, Total=129240 [2023-12-20 09:00:55,452 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 332 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 21226 mSolverCounterSat, 1449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 22675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1449 IncrementalHoareTripleChecker+Valid, 21226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2023-12-20 09:00:55,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 664 Invalid, 22675 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1449 Valid, 21226 Invalid, 0 Unknown, 0 Unchecked, 12.8s Time] [2023-12-20 09:00:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-12-20 09:00:55,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 125. [2023-12-20 09:00:55,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0806451612903225) internal successors, (134), 124 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:00:55,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 134 transitions. [2023-12-20 09:00:55,588 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 134 transitions. Word has length 95 [2023-12-20 09:00:55,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:00:55,588 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 134 transitions. [2023-12-20 09:00:55,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 236 states, 236 states have (on average 1.1228813559322033) internal successors, (265), 236 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:00:55,589 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 134 transitions. [2023-12-20 09:00:55,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-12-20 09:00:55,589 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:00:55,589 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:00:55,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-12-20 09:00:55,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:00:55,796 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:00:55,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:00:55,796 INFO L85 PathProgramCache]: Analyzing trace with hash 800528888, now seen corresponding path program 30 times [2023-12-20 09:00:55,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:00:55,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431127459] [2023-12-20 09:00:55,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:00:55,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:00:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:00:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 67 proven. 77 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-12-20 09:00:56,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:00:56,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431127459] [2023-12-20 09:00:56,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431127459] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:00:56,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931765433] [2023-12-20 09:00:56,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 09:00:56,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:00:56,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:00:56,143 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:00:56,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-20 09:00:56,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-20 09:00:56,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:00:56,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-20 09:00:56,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:00:56,709 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-12-20 09:00:56,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:00:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-12-20 09:00:56,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931765433] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:00:56,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:00:56,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-12-20 09:00:56,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761254827] [2023-12-20 09:00:56,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:00:56,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-20 09:00:56,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:00:56,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-20 09:00:56,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2023-12-20 09:00:56,938 INFO L87 Difference]: Start difference. First operand 125 states and 134 transitions. Second operand has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 41 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) [2023-12-20 09:00:57,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:00:57,578 INFO L93 Difference]: Finished difference Result 318 states and 344 transitions. [2023-12-20 09:00:57,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-20 09:00:57,579 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 41 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 96 [2023-12-20 09:00:57,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:00:57,581 INFO L225 Difference]: With dead ends: 318 [2023-12-20 09:00:57,581 INFO L226 Difference]: Without dead ends: 138 [2023-12-20 09:00:57,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 155 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2023-12-20 09:00:57,582 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 55 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 564 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 564 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 09:00:57,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 52 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [564 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 09:00:57,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-12-20 09:00:57,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 128. [2023-12-20 09:00:57,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.0708661417322836) internal successors, (136), 127 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) [2023-12-20 09:00:57,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 136 transitions. [2023-12-20 09:00:57,719 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 136 transitions. Word has length 96 [2023-12-20 09:00:57,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:00:57,719 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 136 transitions. [2023-12-20 09:00:57,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 41 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) [2023-12-20 09:00:57,719 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 136 transitions. [2023-12-20 09:00:57,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-12-20 09:00:57,719 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:00:57,719 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:00:57,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-12-20 09:00:57,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-12-20 09:00:57,926 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:00:57,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:00:57,926 INFO L85 PathProgramCache]: Analyzing trace with hash 948022012, now seen corresponding path program 31 times [2023-12-20 09:00:57,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:00:57,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053861141] [2023-12-20 09:00:57,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:00:57,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:00:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:00:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 55 proven. 89 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2023-12-20 09:00:58,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:00:58,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053861141] [2023-12-20 09:00:58,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053861141] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:00:58,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65364415] [2023-12-20 09:00:58,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 09:00:58,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:00:58,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:00:58,297 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:00:58,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-20 09:00:58,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:00:58,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-20 09:00:58,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:00:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2023-12-20 09:00:58,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:00:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2023-12-20 09:00:58,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65364415] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:00:58,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:00:58,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-12-20 09:00:58,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158962459] [2023-12-20 09:00:58,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:00:58,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-20 09:00:58,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:00:58,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-20 09:00:58,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2023-12-20 09:00:58,856 INFO L87 Difference]: Start difference. First operand 128 states and 136 transitions. Second operand has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 41 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) [2023-12-20 09:00:59,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:00:59,336 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2023-12-20 09:00:59,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-20 09:00:59,336 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 41 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 99 [2023-12-20 09:00:59,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:00:59,337 INFO L225 Difference]: With dead ends: 133 [2023-12-20 09:00:59,337 INFO L226 Difference]: Without dead ends: 103 [2023-12-20 09:00:59,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 160 SyntacticMatches, 24 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=676, Invalid=2294, Unknown=0, NotChecked=0, Total=2970 [2023-12-20 09:00:59,338 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 52 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 09:00:59,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 22 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 09:00:59,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-12-20 09:00:59,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-12-20 09:00:59,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0686274509803921) internal successors, (109), 102 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) [2023-12-20 09:00:59,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 109 transitions. [2023-12-20 09:00:59,427 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 109 transitions. Word has length 99 [2023-12-20 09:00:59,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:00:59,427 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 109 transitions. [2023-12-20 09:00:59,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 41 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) [2023-12-20 09:00:59,427 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 109 transitions. [2023-12-20 09:00:59,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-20 09:00:59,428 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:00:59,428 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:00:59,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-12-20 09:00:59,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:00:59,633 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:00:59,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:00:59,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1620806240, now seen corresponding path program 32 times [2023-12-20 09:00:59,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:00:59,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657464737] [2023-12-20 09:00:59,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:00:59,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:00:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:01:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 36 proven. 510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:01:19,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:01:19,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657464737] [2023-12-20 09:01:19,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657464737] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:01:19,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095153384] [2023-12-20 09:01:19,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 09:01:19,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:01:19,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:01:19,144 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:01:19,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-20 09:01:19,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 09:01:19,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:01:19,300 WARN L260 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 324 conjunts are in the unsatisfiable core [2023-12-20 09:01:19,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:01:20,047 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 [2023-12-20 09:01:30,963 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 546 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:01:30,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:01:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 468 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-20 09:01:49,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095153384] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:01:49,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:01:49,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 89, 79] total 256 [2023-12-20 09:01:49,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934427236] [2023-12-20 09:01:49,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:01:49,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 256 states [2023-12-20 09:01:49,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:01:49,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 256 interpolants. [2023-12-20 09:01:49,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1592, Invalid=63688, Unknown=0, NotChecked=0, Total=65280 [2023-12-20 09:01:49,286 INFO L87 Difference]: Start difference. First operand 103 states and 109 transitions. Second operand has 256 states, 256 states have (on average 1.11328125) internal successors, (285), 256 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) [2023-12-20 09:02:32,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:02:32,872 INFO L93 Difference]: Finished difference Result 383 states and 413 transitions. [2023-12-20 09:02:32,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 233 states. [2023-12-20 09:02:32,872 INFO L78 Accepts]: Start accepts. Automaton has has 256 states, 256 states have (on average 1.11328125) internal successors, (285), 256 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) Word has length 102 [2023-12-20 09:02:32,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:02:32,873 INFO L225 Difference]: With dead ends: 383 [2023-12-20 09:02:32,873 INFO L226 Difference]: Without dead ends: 349 [2023-12-20 09:02:32,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 394 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49363 ImplicationChecksByTransitivity, 65.0s TimeCoverageRelationStatistics Valid=5318, Invalid=151102, Unknown=0, NotChecked=0, Total=156420 [2023-12-20 09:02:32,878 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 164 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 20504 mSolverCounterSat, 794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 21298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 794 IncrementalHoareTripleChecker+Valid, 20504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2023-12-20 09:02:32,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 652 Invalid, 21298 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [794 Valid, 20504 Invalid, 0 Unknown, 0 Unchecked, 12.8s Time] [2023-12-20 09:02:32,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-12-20 09:02:33,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 179. [2023-12-20 09:02:33,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.0786516853932584) internal successors, (192), 178 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:02:33,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 192 transitions. [2023-12-20 09:02:33,054 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 192 transitions. Word has length 102 [2023-12-20 09:02:33,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:02:33,054 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 192 transitions. [2023-12-20 09:02:33,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 256 states, 256 states have (on average 1.11328125) internal successors, (285), 256 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) [2023-12-20 09:02:33,054 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 192 transitions. [2023-12-20 09:02:33,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-20 09:02:33,055 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:02:33,055 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:02:33,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-12-20 09:02:33,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:02:33,260 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:02:33,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:02:33,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1323002098, now seen corresponding path program 33 times [2023-12-20 09:02:33,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:02:33,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970830207] [2023-12-20 09:02:33,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:02:33,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:02:33,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:02:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 79 proven. 90 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2023-12-20 09:02:33,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:02:33,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970830207] [2023-12-20 09:02:33,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970830207] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:02:33,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582381362] [2023-12-20 09:02:33,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 09:02:33,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:02:33,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:02:33,640 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:02:33,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-20 09:02:33,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-20 09:02:33,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:02:33,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-20 09:02:33,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:02:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2023-12-20 09:02:34,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:02:34,441 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2023-12-20 09:02:34,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582381362] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:02:34,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:02:34,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2023-12-20 09:02:34,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301243198] [2023-12-20 09:02:34,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:02:34,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-20 09:02:34,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:02:34,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-20 09:02:34,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2023-12-20 09:02:34,443 INFO L87 Difference]: Start difference. First operand 179 states and 192 transitions. Second operand has 44 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 44 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:02:35,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:02:35,185 INFO L93 Difference]: Finished difference Result 353 states and 379 transitions. [2023-12-20 09:02:35,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-20 09:02:35,185 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 44 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-12-20 09:02:35,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:02:35,186 INFO L225 Difference]: With dead ends: 353 [2023-12-20 09:02:35,186 INFO L226 Difference]: Without dead ends: 147 [2023-12-20 09:02:35,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 179 SyntacticMatches, 25 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=765, Invalid=2427, Unknown=0, NotChecked=0, Total=3192 [2023-12-20 09:02:35,187 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 97 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 09:02:35,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 37 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 09:02:35,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-12-20 09:02:35,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 137. [2023-12-20 09:02:35,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0661764705882353) internal successors, (145), 136 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:02:35,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 145 transitions. [2023-12-20 09:02:35,332 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 145 transitions. Word has length 103 [2023-12-20 09:02:35,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:02:35,332 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 145 transitions. [2023-12-20 09:02:35,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 44 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:02:35,332 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 145 transitions. [2023-12-20 09:02:35,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-12-20 09:02:35,333 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:02:35,333 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:02:35,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-12-20 09:02:35,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-20 09:02:35,540 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:02:35,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:02:35,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1327240770, now seen corresponding path program 34 times [2023-12-20 09:02:35,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:02:35,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752801489] [2023-12-20 09:02:35,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:02:35,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:02:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:02:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 66 proven. 103 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2023-12-20 09:02:35,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:02:35,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752801489] [2023-12-20 09:02:35,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752801489] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:02:35,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872312240] [2023-12-20 09:02:35,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 09:02:35,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:02:35,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:02:35,932 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:02:35,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-20 09:02:36,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 09:02:36,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:02:36,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-20 09:02:36,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:02:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2023-12-20 09:02:36,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:02:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2023-12-20 09:02:36,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872312240] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:02:36,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:02:36,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2023-12-20 09:02:36,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333062346] [2023-12-20 09:02:36,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:02:36,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-20 09:02:36,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:02:36,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-20 09:02:36,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2023-12-20 09:02:36,532 INFO L87 Difference]: Start difference. First operand 137 states and 145 transitions. Second operand has 44 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 44 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) [2023-12-20 09:02:37,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:02:37,087 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2023-12-20 09:02:37,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-20 09:02:37,087 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 44 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) Word has length 106 [2023-12-20 09:02:37,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:02:37,088 INFO L225 Difference]: With dead ends: 142 [2023-12-20 09:02:37,088 INFO L226 Difference]: Without dead ends: 110 [2023-12-20 09:02:37,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 172 SyntacticMatches, 26 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=776, Invalid=2646, Unknown=0, NotChecked=0, Total=3422 [2023-12-20 09:02:37,089 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 68 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 554 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 554 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 09:02:37,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 22 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [554 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 09:02:37,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-12-20 09:02:37,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2023-12-20 09:02:37,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0642201834862386) internal successors, (116), 109 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:02:37,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2023-12-20 09:02:37,198 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 106 [2023-12-20 09:02:37,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:02:37,198 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2023-12-20 09:02:37,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 44 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) [2023-12-20 09:02:37,198 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2023-12-20 09:02:37,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-20 09:02:37,198 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:02:37,198 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:02:37,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-12-20 09:02:37,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-12-20 09:02:37,404 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:02:37,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:02:37,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1949504230, now seen corresponding path program 35 times [2023-12-20 09:02:37,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:02:37,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222773307] [2023-12-20 09:02:37,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:02:37,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:02:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:03:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 34 proven. 603 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:03:08,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:03:08,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222773307] [2023-12-20 09:03:08,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222773307] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:03:08,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527202697] [2023-12-20 09:03:08,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 09:03:08,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:03:08,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:03:08,321 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:03:08,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-20 09:03:09,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-12-20 09:03:09,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:03:09,722 WARN L260 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 360 conjunts are in the unsatisfiable core [2023-12-20 09:03:09,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:03:10,275 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 11 treesize of output 7 [2023-12-20 09:03:10,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 09:03:10,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 09:03:10,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 09:03:10,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 09:03:21,494 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 637 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:03:21,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:03:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 546 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-12-20 09:03:39,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527202697] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:03:39,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:03:39,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 97, 85] total 277 [2023-12-20 09:03:39,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27548058] [2023-12-20 09:03:39,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:03:39,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 277 states [2023-12-20 09:03:39,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:03:39,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 277 interpolants. [2023-12-20 09:03:39,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1722, Invalid=74730, Unknown=0, NotChecked=0, Total=76452 [2023-12-20 09:03:39,446 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand has 277 states, 277 states have (on average 1.1010830324909748) internal successors, (305), 277 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:04:27,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:04:27,423 INFO L93 Difference]: Finished difference Result 445 states and 479 transitions. [2023-12-20 09:04:27,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2023-12-20 09:04:27,423 INFO L78 Accepts]: Start accepts. Automaton has has 277 states, 277 states have (on average 1.1010830324909748) internal successors, (305), 277 states have internal predecessors, (305), 0 states have call successors, (0), 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 109 [2023-12-20 09:04:27,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:04:27,424 INFO L225 Difference]: With dead ends: 445 [2023-12-20 09:04:27,424 INFO L226 Difference]: Without dead ends: 409 [2023-12-20 09:04:27,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60739 ImplicationChecksByTransitivity, 64.9s TimeCoverageRelationStatistics Valid=5688, Invalid=166122, Unknown=0, NotChecked=0, Total=171810 [2023-12-20 09:04:27,430 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 159 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 26701 mSolverCounterSat, 1015 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 27716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1015 IncrementalHoareTripleChecker+Valid, 26701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2023-12-20 09:04:27,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 603 Invalid, 27716 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1015 Valid, 26701 Invalid, 0 Unknown, 0 Unchecked, 17.1s Time] [2023-12-20 09:04:27,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2023-12-20 09:04:27,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 223. [2023-12-20 09:04:27,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.0765765765765767) internal successors, (239), 222 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) [2023-12-20 09:04:27,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 239 transitions. [2023-12-20 09:04:27,687 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 239 transitions. Word has length 109 [2023-12-20 09:04:27,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:04:27,688 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 239 transitions. [2023-12-20 09:04:27,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 277 states, 277 states have (on average 1.1010830324909748) internal successors, (305), 277 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:04:27,688 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 239 transitions. [2023-12-20 09:04:27,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-12-20 09:04:27,688 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:04:27,689 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:04:27,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-12-20 09:04:27,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-12-20 09:04:27,890 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:04:27,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:04:27,890 INFO L85 PathProgramCache]: Analyzing trace with hash -276701000, now seen corresponding path program 36 times [2023-12-20 09:04:27,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:04:27,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936499436] [2023-12-20 09:04:27,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:04:27,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:04:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:04:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 92 proven. 104 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2023-12-20 09:04:28,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:04:28,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936499436] [2023-12-20 09:04:28,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936499436] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:04:28,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537415396] [2023-12-20 09:04:28,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 09:04:28,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:04:28,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:04:28,361 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:04:28,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-20 09:04:28,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-12-20 09:04:28,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:04:28,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-20 09:04:28,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:04:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2023-12-20 09:04:29,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:04:29,437 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2023-12-20 09:04:29,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537415396] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:04:29,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:04:29,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2023-12-20 09:04:29,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073692435] [2023-12-20 09:04:29,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:04:29,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-20 09:04:29,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:04:29,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-20 09:04:29,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2023-12-20 09:04:29,446 INFO L87 Difference]: Start difference. First operand 223 states and 239 transitions. Second operand has 47 states, 47 states have (on average 2.0) internal successors, (94), 47 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:04:30,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:04:30,248 INFO L93 Difference]: Finished difference Result 406 states and 435 transitions. [2023-12-20 09:04:30,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-20 09:04:30,249 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0) internal successors, (94), 47 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2023-12-20 09:04:30,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:04:30,249 INFO L225 Difference]: With dead ends: 406 [2023-12-20 09:04:30,249 INFO L226 Difference]: Without dead ends: 121 [2023-12-20 09:04:30,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 191 SyntacticMatches, 27 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=872, Invalid=2788, Unknown=0, NotChecked=0, Total=3660 [2023-12-20 09:04:30,251 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 60 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 09:04:30,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 40 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 09:04:30,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-12-20 09:04:30,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 116. [2023-12-20 09:04:30,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0608695652173914) internal successors, (122), 115 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:04:30,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 122 transitions. [2023-12-20 09:04:30,414 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 122 transitions. Word has length 110 [2023-12-20 09:04:30,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:04:30,414 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 122 transitions. [2023-12-20 09:04:30,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0) internal successors, (94), 47 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:04:30,414 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 122 transitions. [2023-12-20 09:04:30,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-20 09:04:30,414 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:04:30,415 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:04:30,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-12-20 09:04:30,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-20 09:04:30,615 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:04:30,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:04:30,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2087200398, now seen corresponding path program 37 times [2023-12-20 09:04:30,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:04:30,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868420258] [2023-12-20 09:04:30,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:04:30,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:04:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:04:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 78 proven. 118 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2023-12-20 09:04:31,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:04:31,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868420258] [2023-12-20 09:04:31,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868420258] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:04:31,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175175504] [2023-12-20 09:04:31,074 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 09:04:31,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:04:31,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:04:31,075 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:04:31,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-20 09:04:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:04:31,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-20 09:04:31,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:04:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2023-12-20 09:04:31,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:04:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2023-12-20 09:04:31,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175175504] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:04:31,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:04:31,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2023-12-20 09:04:31,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332317613] [2023-12-20 09:04:31,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:04:31,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-20 09:04:31,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:04:31,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-20 09:04:31,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2023-12-20 09:04:31,831 INFO L87 Difference]: Start difference. First operand 116 states and 122 transitions. Second operand has 47 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 47 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) [2023-12-20 09:04:32,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:04:32,475 INFO L93 Difference]: Finished difference Result 121 states and 127 transitions. [2023-12-20 09:04:32,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-20 09:04:32,476 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 47 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 115 [2023-12-20 09:04:32,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:04:32,476 INFO L225 Difference]: With dead ends: 121 [2023-12-20 09:04:32,476 INFO L226 Difference]: Without dead ends: 117 [2023-12-20 09:04:32,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 186 SyntacticMatches, 28 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=883, Invalid=3023, Unknown=0, NotChecked=0, Total=3906 [2023-12-20 09:04:32,477 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 689 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 689 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 09:04:32,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 25 Invalid, 1473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [689 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 09:04:32,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-12-20 09:04:32,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2023-12-20 09:04:32,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0603448275862069) internal successors, (123), 116 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:04:32,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 123 transitions. [2023-12-20 09:04:32,602 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 123 transitions. Word has length 115 [2023-12-20 09:04:32,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:04:32,603 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 123 transitions. [2023-12-20 09:04:32,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 47 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) [2023-12-20 09:04:32,603 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 123 transitions. [2023-12-20 09:04:32,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-20 09:04:32,603 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:04:32,603 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:04:32,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-12-20 09:04:32,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-12-20 09:04:32,804 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:04:32,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:04:32,804 INFO L85 PathProgramCache]: Analyzing trace with hash -250314912, now seen corresponding path program 38 times [2023-12-20 09:04:32,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:04:32,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863389461] [2023-12-20 09:04:32,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:04:32,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:04:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:04:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 81 proven. 654 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:04:59,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:04:59,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863389461] [2023-12-20 09:04:59,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863389461] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:04:59,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334886590] [2023-12-20 09:04:59,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 09:04:59,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:04:59,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:04:59,304 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:04:59,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-12-20 09:04:59,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 09:04:59,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:04:59,488 WARN L260 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 376 conjunts are in the unsatisfiable core [2023-12-20 09:04:59,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:05:00,529 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 [2023-12-20 09:05:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 0 proven. 735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:05:15,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:05:46,505 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-12-20 09:05:46,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334886590] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:05:46,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:05:46,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 103, 91] total 296 [2023-12-20 09:05:46,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486255232] [2023-12-20 09:05:46,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:05:46,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 296 states [2023-12-20 09:05:46,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:05:46,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 296 interpolants. [2023-12-20 09:05:46,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1291, Invalid=86029, Unknown=0, NotChecked=0, Total=87320 [2023-12-20 09:05:46,510 INFO L87 Difference]: Start difference. First operand 117 states and 123 transitions. Second operand has 296 states, 296 states have (on average 1.097972972972973) internal successors, (325), 296 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:06:53,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:06:53,902 INFO L93 Difference]: Finished difference Result 266 states and 287 transitions. [2023-12-20 09:06:53,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2023-12-20 09:06:53,902 INFO L78 Accepts]: Start accepts. Automaton has has 296 states, 296 states have (on average 1.097972972972973) internal successors, (325), 296 states have internal predecessors, (325), 0 states have call successors, (0), 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 [2023-12-20 09:06:53,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:06:53,903 INFO L225 Difference]: With dead ends: 266 [2023-12-20 09:06:53,903 INFO L226 Difference]: Without dead ends: 260 [2023-12-20 09:06:53,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 445 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53289 ImplicationChecksByTransitivity, 99.1s TimeCoverageRelationStatistics Valid=6821, Invalid=192541, Unknown=0, NotChecked=0, Total=199362 [2023-12-20 09:06:53,910 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 345 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 31870 mSolverCounterSat, 1734 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 33604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1734 IncrementalHoareTripleChecker+Valid, 31870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.0s IncrementalHoareTripleChecker+Time [2023-12-20 09:06:53,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 815 Invalid, 33604 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1734 Valid, 31870 Invalid, 0 Unknown, 0 Unchecked, 21.0s Time] [2023-12-20 09:06:53,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-12-20 09:06:54,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 152. [2023-12-20 09:06:54,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0662251655629138) internal successors, (161), 151 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:06:54,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 161 transitions. [2023-12-20 09:06:54,101 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 161 transitions. Word has length 116 [2023-12-20 09:06:54,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:06:54,101 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 161 transitions. [2023-12-20 09:06:54,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 296 states, 296 states have (on average 1.097972972972973) internal successors, (325), 296 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:06:54,101 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 161 transitions. [2023-12-20 09:06:54,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-12-20 09:06:54,102 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:06:54,102 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:06:54,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-12-20 09:06:54,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-12-20 09:06:54,303 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:06:54,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:06:54,303 INFO L85 PathProgramCache]: Analyzing trace with hash 858560306, now seen corresponding path program 39 times [2023-12-20 09:06:54,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:06:54,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497719506] [2023-12-20 09:06:54,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:06:54,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:06:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:06:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 106 proven. 119 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2023-12-20 09:06:54,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:06:54,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497719506] [2023-12-20 09:06:54,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497719506] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:06:54,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055384132] [2023-12-20 09:06:54,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 09:06:54,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:06:54,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:06:54,819 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:06:54,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-12-20 09:06:55,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-20 09:06:55,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:06:55,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-20 09:06:55,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:06:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2023-12-20 09:06:55,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:06:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2023-12-20 09:06:55,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055384132] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:06:55,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:06:55,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2023-12-20 09:06:55,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353596499] [2023-12-20 09:06:55,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:06:55,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-20 09:06:55,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:06:55,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-20 09:06:55,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2023-12-20 09:06:55,897 INFO L87 Difference]: Start difference. First operand 152 states and 161 transitions. Second operand has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:06:56,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:06:56,876 INFO L93 Difference]: Finished difference Result 384 states and 410 transitions. [2023-12-20 09:06:56,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-20 09:06:56,877 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2023-12-20 09:06:56,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:06:56,877 INFO L225 Difference]: With dead ends: 384 [2023-12-20 09:06:56,877 INFO L226 Difference]: Without dead ends: 165 [2023-12-20 09:06:56,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 188 SyntacticMatches, 29 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2023-12-20 09:06:56,878 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 109 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 09:06:56,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 46 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 09:06:56,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-12-20 09:06:57,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 155. [2023-12-20 09:06:57,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0584415584415585) internal successors, (163), 154 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:06:57,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 163 transitions. [2023-12-20 09:06:57,085 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 163 transitions. Word has length 117 [2023-12-20 09:06:57,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:06:57,086 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 163 transitions. [2023-12-20 09:06:57,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:06:57,086 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 163 transitions. [2023-12-20 09:06:57,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-12-20 09:06:57,086 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:06:57,086 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:06:57,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-12-20 09:06:57,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-12-20 09:06:57,287 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:06:57,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:06:57,288 INFO L85 PathProgramCache]: Analyzing trace with hash -692832254, now seen corresponding path program 40 times [2023-12-20 09:06:57,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:06:57,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767376598] [2023-12-20 09:06:57,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:06:57,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:06:57,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:06:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 91 proven. 134 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-12-20 09:06:57,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:06:57,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767376598] [2023-12-20 09:06:57,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767376598] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:06:57,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192334842] [2023-12-20 09:06:57,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 09:06:57,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:06:57,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:06:57,824 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:06:57,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-12-20 09:06:57,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 09:06:57,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:06:57,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-20 09:06:57,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:06:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-12-20 09:06:58,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:06:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-12-20 09:06:58,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192334842] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:06:58,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:06:58,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2023-12-20 09:06:58,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083972302] [2023-12-20 09:06:58,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:06:58,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-20 09:06:58,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:06:58,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-20 09:06:58,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2023-12-20 09:06:58,583 INFO L87 Difference]: Start difference. First operand 155 states and 163 transitions. Second operand has 50 states, 50 states have (on average 1.78) internal successors, (89), 50 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:06:59,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:06:59,333 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2023-12-20 09:06:59,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-20 09:06:59,333 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.78) internal successors, (89), 50 states have internal predecessors, (89), 0 states have call successors, (0), 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 120 [2023-12-20 09:06:59,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:06:59,334 INFO L225 Difference]: With dead ends: 160 [2023-12-20 09:06:59,334 INFO L226 Difference]: Without dead ends: 124 [2023-12-20 09:06:59,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 194 SyntacticMatches, 30 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2217 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=997, Invalid=3425, Unknown=0, NotChecked=0, Total=4422 [2023-12-20 09:06:59,335 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 09:06:59,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 43 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 09:06:59,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-20 09:06:59,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-12-20 09:06:59,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.056910569105691) internal successors, (130), 123 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:06:59,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2023-12-20 09:06:59,483 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 120 [2023-12-20 09:06:59,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:06:59,484 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2023-12-20 09:06:59,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.78) internal successors, (89), 50 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:06:59,484 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2023-12-20 09:06:59,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-20 09:06:59,484 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:06:59,484 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:06:59,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-12-20 09:06:59,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-12-20 09:06:59,690 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:06:59,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:06:59,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1907203674, now seen corresponding path program 41 times [2023-12-20 09:06:59,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:06:59,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485761041] [2023-12-20 09:06:59,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:06:59,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:07:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:07:31,836 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 99 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:07:31,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:07:31,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485761041] [2023-12-20 09:07:31,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485761041] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:07:31,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766287696] [2023-12-20 09:07:31,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 09:07:31,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:07:31,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:07:31,838 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:07:31,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-12-20 09:07:32,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-12-20 09:07:32,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:07:32,750 WARN L260 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 424 conjunts are in the unsatisfiable core [2023-12-20 09:07:32,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:07:32,949 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 [2023-12-20 09:07:33,041 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 [2023-12-20 09:07:33,162 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 [2023-12-20 09:07:33,255 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 [2023-12-20 09:07:33,348 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 [2023-12-20 09:07:33,440 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 [2023-12-20 09:07:33,536 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 [2023-12-20 09:07:33,636 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 [2023-12-20 09:07:33,743 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 [2023-12-20 09:07:33,843 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 [2023-12-20 09:07:33,948 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 [2023-12-20 09:07:34,051 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 [2023-12-20 09:07:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:07:52,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2023-12-20 09:08:25,451 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-20 09:08:25,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-12-20 09:08:25,468 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 09:08:25,468 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 09:08:25,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:08:25,652 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 124 with TraceHistMax 15,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 309 known predicates. [2023-12-20 09:08:25,655 INFO L445 BasicCegarLoop]: Path program histogram: [41, 1, 1, 1] [2023-12-20 09:08:25,657 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-20 09:08:25,658 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.12 09:08:25 BoogieIcfgContainer [2023-12-20 09:08:25,658 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-20 09:08:25,658 INFO L158 Benchmark]: Toolchain (without parser) took 827221.97ms. Allocated memory was 283.1MB in the beginning and 2.0GB in the end (delta: 1.7GB). Free memory was 230.2MB in the beginning and 1.4GB in the end (delta: -1.2GB). Peak memory consumption was 487.2MB. Max. memory is 8.0GB. [2023-12-20 09:08:25,658 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 224.4MB. Free memory is still 173.6MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 09:08:25,658 INFO L158 Benchmark]: CACSL2BoogieTranslator took 172.05ms. Allocated memory is still 283.1MB. Free memory was 229.9MB in the beginning and 218.6MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-20 09:08:25,658 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.07ms. Allocated memory is still 283.1MB. Free memory was 218.6MB in the beginning and 216.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 09:08:25,658 INFO L158 Benchmark]: Boogie Preprocessor took 33.41ms. Allocated memory is still 283.1MB. Free memory was 216.8MB in the beginning and 214.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 09:08:25,659 INFO L158 Benchmark]: RCFGBuilder took 265.91ms. Allocated memory is still 283.1MB. Free memory was 214.7MB in the beginning and 200.3MB in the end (delta: 14.4MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-20 09:08:25,659 INFO L158 Benchmark]: TraceAbstraction took 826704.99ms. Allocated memory was 283.1MB in the beginning and 2.0GB in the end (delta: 1.7GB). Free memory was 199.7MB in the beginning and 1.4GB in the end (delta: -1.2GB). Peak memory consumption was 456.8MB. Max. memory is 8.0GB. [2023-12-20 09:08:25,659 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 224.4MB. Free memory is still 173.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 172.05ms. Allocated memory is still 283.1MB. Free memory was 229.9MB in the beginning and 218.6MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 34.07ms. Allocated memory is still 283.1MB. Free memory was 218.6MB in the beginning and 216.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.41ms. Allocated memory is still 283.1MB. Free memory was 216.8MB in the beginning and 214.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 265.91ms. Allocated memory is still 283.1MB. Free memory was 214.7MB in the beginning and 200.3MB in the end (delta: 14.4MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 826704.99ms. Allocated memory was 283.1MB in the beginning and 2.0GB in the end (delta: 1.7GB). Free memory was 199.7MB in the beginning and 1.4GB in the end (delta: -1.2GB). Peak memory consumption was 456.8MB. 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 124 with TraceHistMax 15,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 309 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 826.7s, OverallIterations: 44, TraceHistogramMax: 15, PathProgramHistogramMax: 41, EmptinessCheckTime: 0.0s, AutomataDifference: 348.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4478 SdHoareTripleChecker+Valid, 110.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4478 mSDsluCounter, 7555 SdHoareTripleChecker+Invalid, 98.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6993 mSDsCounter, 20531 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 185728 IncrementalHoareTripleChecker+Invalid, 206259 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20531 mSolverCounterUnsat, 562 mSDtfsCounter, 185728 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8833 GetRequests, 3787 SyntacticMatches, 448 SemanticMatches, 4598 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364618 ImplicationChecksByTransitivity, 482.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=223occurred in iteration=38, InterpolantAutomatonStates: 2338, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.0s AutomataMinimizationTime, 43 MinimizatonAttempts, 1350 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 5.8s SatisfiabilityAnalysisTime, 371.7s InterpolantComputationTime, 5939 NumberOfCodeBlocks, 5925 NumberOfCodeBlocksAsserted, 177 NumberOfCheckSat, 8758 ConstructedInterpolants, 9 QuantifiedInterpolants, 211098 SizeOfPredicates, 146 NumberOfNonLiveVariables, 14229 ConjunctsInSsa, 3405 ConjunctsInUnsatCore, 123 InterpolantComputations, 3 PerfectInterpolantSequences, 21904/36664 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