/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/reducercommutativity/sep10-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 07:34:01,240 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 07:34:01,277 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 07:34:01,280 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 07:34:01,280 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 07:34:01,295 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 07:34:01,296 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 07:34:01,296 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 07:34:01,296 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 07:34:01,299 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 07:34:01,299 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 07:34:01,300 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 07:34:01,300 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 07:34:01,301 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 07:34:01,301 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 07:34:01,301 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 07:34:01,301 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 07:34:01,301 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 07:34:01,302 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 07:34:01,302 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 07:34:01,302 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 07:34:01,302 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 07:34:01,302 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 07:34:01,302 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 07:34:01,303 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 07:34:01,303 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 07:34:01,303 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 07:34:01,303 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 07:34:01,303 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 07:34:01,303 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 07:34:01,304 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 07:34:01,304 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 07:34:01,304 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 07:34:01,305 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 07:34:01,305 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 07:34:01,305 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 07:34:01,305 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 07:34:01,305 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 07:34:01,305 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 07:34:01,305 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 07:34:01,305 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 07:34:01,305 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 07:34:01,305 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 07:34:01,306 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 07:34:01,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 07:34:01,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 07:34:01,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 07:34:01,513 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 07:34:01,514 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 07:34:01,515 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep10-2.i [2023-12-20 07:34:02,461 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 07:34:02,609 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 07:34:02,610 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep10-2.i [2023-12-20 07:34:02,615 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46dec3060/a51cbaae532b415e85d9b174ec9ebc7a/FLAGc9a36c14c [2023-12-20 07:34:02,629 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46dec3060/a51cbaae532b415e85d9b174ec9ebc7a [2023-12-20 07:34:02,631 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 07:34:02,632 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 07:34:02,634 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 07:34:02,634 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 07:34:02,637 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 07:34:02,637 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 07:34:02" (1/1) ... [2023-12-20 07:34:02,638 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24ca041e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:02, skipping insertion in model container [2023-12-20 07:34:02,638 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 07:34:02" (1/1) ... [2023-12-20 07:34:02,654 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 07:34:02,770 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep10-2.i[1293,1306] [2023-12-20 07:34:02,774 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 07:34:02,786 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 07:34:02,807 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep10-2.i[1293,1306] [2023-12-20 07:34:02,808 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 07:34:02,816 INFO L206 MainTranslator]: Completed translation [2023-12-20 07:34:02,816 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:02 WrapperNode [2023-12-20 07:34:02,817 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 07:34:02,817 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 07:34:02,817 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 07:34:02,817 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 07:34:02,821 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:02" (1/1) ... [2023-12-20 07:34:02,825 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:02" (1/1) ... [2023-12-20 07:34:02,836 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-12-20 07:34:02,837 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 07:34:02,837 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 07:34:02,837 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 07:34:02,837 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 07:34:02,844 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:02" (1/1) ... [2023-12-20 07:34:02,844 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:02" (1/1) ... [2023-12-20 07:34:02,846 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:02" (1/1) ... [2023-12-20 07:34:02,855 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2023-12-20 07:34:02,855 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:02" (1/1) ... [2023-12-20 07:34:02,855 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:02" (1/1) ... [2023-12-20 07:34:02,859 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:02" (1/1) ... [2023-12-20 07:34:02,861 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:02" (1/1) ... [2023-12-20 07:34:02,862 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:02" (1/1) ... [2023-12-20 07:34:02,862 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:02" (1/1) ... [2023-12-20 07:34:02,864 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 07:34:02,864 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 07:34:02,864 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 07:34:02,864 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 07:34:02,865 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:02" (1/1) ... [2023-12-20 07:34:02,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 07:34:02,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:02,892 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 07:34:02,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 07:34:02,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 07:34:02,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 07:34:02,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-20 07:34:02,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 07:34:02,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 07:34:02,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 07:34:02,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 07:34:02,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 07:34:02,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 07:34:02,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-20 07:34:02,926 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2023-12-20 07:34:02,926 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2023-12-20 07:34:02,909 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 07:34:02,988 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 07:34:02,989 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 07:34:03,148 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 07:34:03,169 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 07:34:03,169 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-20 07:34:03,169 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 07:34:03 BoogieIcfgContainer [2023-12-20 07:34:03,169 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 07:34:03,171 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 07:34:03,171 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 07:34:03,173 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 07:34:03,173 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 07:34:02" (1/3) ... [2023-12-20 07:34:03,174 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b23002a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 07:34:03, skipping insertion in model container [2023-12-20 07:34:03,174 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:02" (2/3) ... [2023-12-20 07:34:03,175 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b23002a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 07:34:03, skipping insertion in model container [2023-12-20 07:34:03,175 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 07:34:03" (3/3) ... [2023-12-20 07:34:03,176 INFO L112 eAbstractionObserver]: Analyzing ICFG sep10-2.i [2023-12-20 07:34:03,187 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 07:34:03,187 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 07:34:03,214 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 07:34:03,218 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;@3012495a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 07:34:03,218 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 07:34:03,221 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:34:03,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-20 07:34:03,225 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:03,226 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:03,226 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:03,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:03,229 INFO L85 PathProgramCache]: Analyzing trace with hash -110337137, now seen corresponding path program 1 times [2023-12-20 07:34:03,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:03,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089603395] [2023-12-20 07:34:03,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:03,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:03,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:03,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-20 07:34:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:03,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 07:34:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:03,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-20 07:34:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 07:34:03,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:03,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089603395] [2023-12-20 07:34:03,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089603395] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 07:34:03,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 07:34:03,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 07:34:03,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387231741] [2023-12-20 07:34:03,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 07:34:03,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 07:34:03,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:34:03,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 07:34:03,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 07:34:03,471 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-20 07:34:03,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:34:03,507 INFO L93 Difference]: Finished difference Result 43 states and 64 transitions. [2023-12-20 07:34:03,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 07:34:03,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-12-20 07:34:03,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:34:03,512 INFO L225 Difference]: With dead ends: 43 [2023-12-20 07:34:03,512 INFO L226 Difference]: Without dead ends: 21 [2023-12-20 07:34:03,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 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 07:34:03,518 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:34:03,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:34:03,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-20 07:34:03,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-20 07:34:03,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:34:03,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-12-20 07:34:03,545 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 25 [2023-12-20 07:34:03,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:34:03,546 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-12-20 07:34:03,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-20 07:34:03,546 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-12-20 07:34:03,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-20 07:34:03,548 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:03,548 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:03,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 07:34:03,549 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:03,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:03,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1417820460, now seen corresponding path program 1 times [2023-12-20 07:34:03,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:03,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029331337] [2023-12-20 07:34:03,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:03,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:03,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-20 07:34:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:03,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 07:34:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:03,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 07:34:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:03,703 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 07:34:03,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:03,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029331337] [2023-12-20 07:34:03,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029331337] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:34:03,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96148168] [2023-12-20 07:34:03,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:03,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:03,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:03,706 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 07:34:03,725 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 07:34:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:03,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 07:34:03,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:34:03,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-20 07:34:03,801 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 07:34:03,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96148168] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 07:34:03,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 07:34:03,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-12-20 07:34:03,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400552912] [2023-12-20 07:34:03,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 07:34:03,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 07:34:03,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:34:03,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 07:34:03,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 07:34:03,807 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 07:34:03,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:34:03,828 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2023-12-20 07:34:03,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 07:34:03,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-12-20 07:34:03,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:34:03,830 INFO L225 Difference]: With dead ends: 40 [2023-12-20 07:34:03,831 INFO L226 Difference]: Without dead ends: 24 [2023-12-20 07:34:03,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 07:34:03,833 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:34:03,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 36 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:34:03,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-20 07:34:03,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-12-20 07:34:03,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:34:03,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-12-20 07:34:03,840 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 26 [2023-12-20 07:34:03,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:34:03,840 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-12-20 07:34:03,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 07:34:03,840 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-12-20 07:34:03,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-20 07:34:03,841 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:03,841 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:03,851 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 07:34:04,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:04,042 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:04,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:04,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1584330763, now seen corresponding path program 1 times [2023-12-20 07:34:04,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:04,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709279903] [2023-12-20 07:34:04,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:04,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:04,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-20 07:34:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:04,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 07:34:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:04,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-20 07:34:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-20 07:34:04,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:04,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709279903] [2023-12-20 07:34:04,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709279903] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:34:04,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781950496] [2023-12-20 07:34:04,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:04,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:04,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:04,176 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 07:34:04,188 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 07:34:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:04,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 07:34:04,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:34:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-20 07:34:04,238 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 07:34:04,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781950496] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 07:34:04,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 07:34:04,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-20 07:34:04,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339814812] [2023-12-20 07:34:04,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 07:34:04,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 07:34:04,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:34:04,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 07:34:04,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-20 07:34:04,239 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 07:34:04,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:34:04,251 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2023-12-20 07:34:04,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 07:34:04,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-12-20 07:34:04,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:34:04,253 INFO L225 Difference]: With dead ends: 36 [2023-12-20 07:34:04,253 INFO L226 Difference]: Without dead ends: 23 [2023-12-20 07:34:04,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-20 07:34:04,255 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:34:04,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:34:04,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-20 07:34:04,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-20 07:34:04,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:34:04,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-12-20 07:34:04,261 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 35 [2023-12-20 07:34:04,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:34:04,262 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-12-20 07:34:04,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 07:34:04,262 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-12-20 07:34:04,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-20 07:34:04,263 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:04,263 INFO L195 NwaCegarLoop]: trace histogram [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 07:34:04,272 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 07:34:04,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-12-20 07:34:04,470 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:04,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:04,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1105168803, now seen corresponding path program 1 times [2023-12-20 07:34:04,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:04,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336662412] [2023-12-20 07:34:04,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:04,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:04,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-20 07:34:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:04,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 07:34:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:04,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-20 07:34:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-20 07:34:04,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:04,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336662412] [2023-12-20 07:34:04,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336662412] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:34:04,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588827789] [2023-12-20 07:34:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:04,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:04,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:04,613 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 07:34:04,640 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 07:34:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:04,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 07:34:04,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:34:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-20 07:34:04,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:34:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-20 07:34:04,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588827789] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:34:04,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:34:04,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2023-12-20 07:34:04,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124599107] [2023-12-20 07:34:04,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:34:04,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-20 07:34:04,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:34:04,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-20 07:34:04,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-12-20 07:34:04,749 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-20 07:34:04,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:34:04,783 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2023-12-20 07:34:04,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-20 07:34:04,784 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 36 [2023-12-20 07:34:04,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:34:04,785 INFO L225 Difference]: With dead ends: 51 [2023-12-20 07:34:04,785 INFO L226 Difference]: Without dead ends: 31 [2023-12-20 07:34:04,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-12-20 07:34:04,788 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:34:04,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 87 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:34:04,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-20 07:34:04,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-12-20 07:34:04,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:34:04,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-12-20 07:34:04,803 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 36 [2023-12-20 07:34:04,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:34:04,804 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-12-20 07:34:04,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-20 07:34:04,804 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-12-20 07:34:04,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-20 07:34:04,805 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:04,805 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:04,814 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 07:34:05,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:05,015 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:05,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:05,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1956133820, now seen corresponding path program 2 times [2023-12-20 07:34:05,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:05,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721573531] [2023-12-20 07:34:05,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:05,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:05,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:05,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 07:34:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:05,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-20 07:34:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:05,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-12-20 07:34:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:05,117 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-12-20 07:34:05,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:05,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721573531] [2023-12-20 07:34:05,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721573531] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:34:05,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085743755] [2023-12-20 07:34:05,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:34:05,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:05,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:05,119 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 07:34:05,121 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 07:34:05,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:34:05,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:34:05,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 07:34:05,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:34:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-20 07:34:05,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:34:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-20 07:34:05,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085743755] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:34:05,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:34:05,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2023-12-20 07:34:05,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795806905] [2023-12-20 07:34:05,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:34:05,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-20 07:34:05,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:34:05,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-20 07:34:05,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-20 07:34:05,291 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-20 07:34:05,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:34:05,327 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2023-12-20 07:34:05,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 07:34:05,327 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), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2023-12-20 07:34:05,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:34:05,328 INFO L225 Difference]: With dead ends: 59 [2023-12-20 07:34:05,328 INFO L226 Difference]: Without dead ends: 36 [2023-12-20 07:34:05,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-20 07:34:05,329 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:34:05,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:34:05,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-20 07:34:05,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-12-20 07:34:05,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:34:05,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-12-20 07:34:05,335 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 48 [2023-12-20 07:34:05,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:34:05,336 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-12-20 07:34:05,336 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), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-20 07:34:05,336 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-12-20 07:34:05,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-20 07:34:05,337 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:05,337 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:05,344 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 07:34:05,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:05,545 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:05,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:05,546 INFO L85 PathProgramCache]: Analyzing trace with hash -538144458, now seen corresponding path program 3 times [2023-12-20 07:34:05,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:05,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426201988] [2023-12-20 07:34:05,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:05,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:05,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 07:34:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:05,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-20 07:34:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:05,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-12-20 07:34:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-20 07:34:05,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:05,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426201988] [2023-12-20 07:34:05,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426201988] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:34:05,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559270438] [2023-12-20 07:34:05,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:34:05,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:05,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:05,698 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 07:34:05,728 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 07:34:05,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-20 07:34:05,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:34:05,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 07:34:05,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:34:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-20 07:34:05,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:34:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-12-20 07:34:05,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559270438] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:34:05,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:34:05,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-12-20 07:34:05,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918986924] [2023-12-20 07:34:05,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:34:05,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-20 07:34:05,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:34:05,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-20 07:34:05,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-12-20 07:34:05,836 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-20 07:34:05,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:34:05,869 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2023-12-20 07:34:05,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-20 07:34:05,870 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2023-12-20 07:34:05,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:34:05,870 INFO L225 Difference]: With dead ends: 67 [2023-12-20 07:34:05,870 INFO L226 Difference]: Without dead ends: 45 [2023-12-20 07:34:05,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-12-20 07:34:05,871 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:34:05,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 103 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:34:05,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-12-20 07:34:05,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2023-12-20 07:34:05,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:34:05,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2023-12-20 07:34:05,875 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 55 [2023-12-20 07:34:05,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:34:05,875 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2023-12-20 07:34:05,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-20 07:34:05,876 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2023-12-20 07:34:05,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-20 07:34:05,876 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:05,876 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:05,886 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 07:34:06,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:06,087 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:06,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:06,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1299676501, now seen corresponding path program 4 times [2023-12-20 07:34:06,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:06,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229411950] [2023-12-20 07:34:06,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:06,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:06,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 07:34:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:06,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-20 07:34:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:06,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-12-20 07:34:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:06,210 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-12-20 07:34:06,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:06,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229411950] [2023-12-20 07:34:06,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229411950] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:34:06,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034483798] [2023-12-20 07:34:06,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 07:34:06,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:06,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:06,212 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 07:34:06,228 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 07:34:06,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 07:34:06,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:34:06,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-20 07:34:06,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:34:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-12-20 07:34:06,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:34:06,347 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-12-20 07:34:06,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034483798] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:34:06,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:34:06,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-12-20 07:34:06,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390764971] [2023-12-20 07:34:06,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:34:06,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-20 07:34:06,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:34:06,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-20 07:34:06,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2023-12-20 07:34:06,348 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 07:34:06,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:34:06,376 INFO L93 Difference]: Finished difference Result 87 states and 112 transitions. [2023-12-20 07:34:06,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 07:34:06,376 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2023-12-20 07:34:06,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:34:06,377 INFO L225 Difference]: With dead ends: 87 [2023-12-20 07:34:06,377 INFO L226 Difference]: Without dead ends: 58 [2023-12-20 07:34:06,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2023-12-20 07:34:06,378 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 17 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:34:06,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 93 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:34:06,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-20 07:34:06,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-12-20 07:34:06,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:34:06,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2023-12-20 07:34:06,382 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 68 [2023-12-20 07:34:06,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:34:06,382 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2023-12-20 07:34:06,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 07:34:06,382 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2023-12-20 07:34:06,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-20 07:34:06,383 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:06,383 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 10, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:06,388 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 07:34:06,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:06,588 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:06,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:06,588 INFO L85 PathProgramCache]: Analyzing trace with hash -604491626, now seen corresponding path program 5 times [2023-12-20 07:34:06,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:06,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550050323] [2023-12-20 07:34:06,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:06,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:06,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:06,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 07:34:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:06,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 07:34:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:06,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-12-20 07:34:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:06,950 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 0 proven. 514 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2023-12-20 07:34:06,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:06,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550050323] [2023-12-20 07:34:06,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550050323] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:34:06,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525145716] [2023-12-20 07:34:06,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 07:34:06,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:06,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:06,952 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 07:34:06,972 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 07:34:07,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2023-12-20 07:34:07,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:34:07,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-20 07:34:07,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:34:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 420 proven. 92 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2023-12-20 07:34:07,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:34:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 0 proven. 514 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2023-12-20 07:34:07,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525145716] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:34:07,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:34:07,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 12 [2023-12-20 07:34:07,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149415236] [2023-12-20 07:34:07,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:34:07,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-20 07:34:07,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:34:07,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-20 07:34:07,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-12-20 07:34:07,363 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 07:34:07,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:34:07,390 INFO L93 Difference]: Finished difference Result 108 states and 137 transitions. [2023-12-20 07:34:07,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-20 07:34:07,390 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2023-12-20 07:34:07,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:34:07,391 INFO L225 Difference]: With dead ends: 108 [2023-12-20 07:34:07,391 INFO L226 Difference]: Without dead ends: 64 [2023-12-20 07:34:07,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 223 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-12-20 07:34:07,392 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:34:07,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 67 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:34:07,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-20 07:34:07,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-12-20 07:34:07,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 59 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:34:07,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2023-12-20 07:34:07,409 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 113 [2023-12-20 07:34:07,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:34:07,410 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2023-12-20 07:34:07,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 07:34:07,410 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2023-12-20 07:34:07,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-12-20 07:34:07,413 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:07,413 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 10, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:07,420 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 07:34:07,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:07,620 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:07,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:07,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1826880202, now seen corresponding path program 6 times [2023-12-20 07:34:07,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:07,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961385234] [2023-12-20 07:34:07,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:07,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:07,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 07:34:07,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:07,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-12-20 07:34:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:07,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-12-20 07:34:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1462 trivial. 0 not checked. [2023-12-20 07:34:07,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:07,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961385234] [2023-12-20 07:34:07,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961385234] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:34:07,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580575727] [2023-12-20 07:34:07,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 07:34:07,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:07,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:07,898 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 07:34:07,919 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 07:34:08,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-12-20 07:34:08,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:34:08,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 07:34:08,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:34:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 648 proven. 21 refuted. 0 times theorem prover too weak. 814 trivial. 0 not checked. [2023-12-20 07:34:08,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:34:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1462 trivial. 0 not checked. [2023-12-20 07:34:08,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580575727] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:34:08,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:34:08,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2023-12-20 07:34:08,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42820666] [2023-12-20 07:34:08,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:34:08,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-20 07:34:08,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:34:08,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-20 07:34:08,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-12-20 07:34:08,303 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 07:34:08,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:34:08,321 INFO L93 Difference]: Finished difference Result 107 states and 134 transitions. [2023-12-20 07:34:08,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-20 07:34:08,321 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 131 [2023-12-20 07:34:08,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:34:08,322 INFO L225 Difference]: With dead ends: 107 [2023-12-20 07:34:08,322 INFO L226 Difference]: Without dead ends: 67 [2023-12-20 07:34:08,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 260 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-12-20 07:34:08,323 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:34:08,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 93 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:34:08,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-20 07:34:08,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-12-20 07:34:08,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 62 states have internal predecessors, (75), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:34:08,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2023-12-20 07:34:08,326 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 131 [2023-12-20 07:34:08,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:34:08,327 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2023-12-20 07:34:08,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 07:34:08,327 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2023-12-20 07:34:08,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-12-20 07:34:08,327 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:08,328 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 10, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:08,335 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 07:34:08,538 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,SelfDestructingSolverStorable8 [2023-12-20 07:34:08,538 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:08,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:08,539 INFO L85 PathProgramCache]: Analyzing trace with hash 692416252, now seen corresponding path program 7 times [2023-12-20 07:34:08,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:08,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192565430] [2023-12-20 07:34:08,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:08,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:10,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 07:34:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:10,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-12-20 07:34:10,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:10,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-12-20 07:34:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:11,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 0 proven. 1305 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2023-12-20 07:34:11,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:11,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192565430] [2023-12-20 07:34:11,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192565430] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:34:11,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999911976] [2023-12-20 07:34:11,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 07:34:11,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:11,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:11,184 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 07:34:11,186 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 07:34:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:11,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 167 conjunts are in the unsatisfiable core [2023-12-20 07:34:11,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:34:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 0 proven. 1360 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-12-20 07:34:11,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:34:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 0 proven. 1305 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2023-12-20 07:34:12,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999911976] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:34:12,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:34:12,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 30, 20] total 43 [2023-12-20 07:34:12,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22539802] [2023-12-20 07:34:12,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:34:12,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-20 07:34:12,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:34:12,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-20 07:34:12,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1704, Unknown=0, NotChecked=0, Total=1806 [2023-12-20 07:34:12,579 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 43 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 39 states have internal predecessors, (91), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-20 07:34:13,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:34:13,246 INFO L93 Difference]: Finished difference Result 244 states and 361 transitions. [2023-12-20 07:34:13,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-20 07:34:13,246 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 39 states have internal predecessors, (91), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 134 [2023-12-20 07:34:13,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:34:13,249 INFO L225 Difference]: With dead ends: 244 [2023-12-20 07:34:13,249 INFO L226 Difference]: Without dead ends: 240 [2023-12-20 07:34:13,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=1785, Unknown=0, NotChecked=0, Total=1892 [2023-12-20 07:34:13,251 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 50 mSDsluCounter, 2699 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2792 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 07:34:13,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 2792 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1736 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 07:34:13,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-12-20 07:34:13,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 199. [2023-12-20 07:34:13,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 191 states have (on average 1.3141361256544504) internal successors, (251), 192 states have internal predecessors, (251), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-20 07:34:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 265 transitions. [2023-12-20 07:34:13,277 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 265 transitions. Word has length 134 [2023-12-20 07:34:13,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:34:13,277 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 265 transitions. [2023-12-20 07:34:13,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 39 states have internal predecessors, (91), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-20 07:34:13,278 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 265 transitions. [2023-12-20 07:34:13,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-12-20 07:34:13,279 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:13,279 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 10, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:13,288 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 07:34:13,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-20 07:34:13,486 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:13,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:13,486 INFO L85 PathProgramCache]: Analyzing trace with hash -116930374, now seen corresponding path program 1 times [2023-12-20 07:34:13,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:13,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749876324] [2023-12-20 07:34:13,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:13,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:15,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 07:34:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:15,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-12-20 07:34:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:15,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-12-20 07:34:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:15,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 324 proven. 907 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-12-20 07:34:15,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:15,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749876324] [2023-12-20 07:34:15,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749876324] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:34:15,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423505375] [2023-12-20 07:34:15,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:15,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:15,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:15,745 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 07:34:15,751 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 07:34:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:15,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-20 07:34:15,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:34:16,015 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 23 treesize of output 11 [2023-12-20 07:34:16,049 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 07:34:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 649 proven. 486 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2023-12-20 07:34:16,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:34:17,647 INFO L349 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2023-12-20 07:34:17,648 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 24 treesize of output 23 [2023-12-20 07:34:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 674 proven. 459 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2023-12-20 07:34:17,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423505375] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:34:17,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:34:17,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 22, 20] total 65 [2023-12-20 07:34:17,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024526027] [2023-12-20 07:34:17,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:34:17,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-12-20 07:34:17,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:34:17,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-12-20 07:34:17,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=3918, Unknown=0, NotChecked=0, Total=4160 [2023-12-20 07:34:17,696 INFO L87 Difference]: Start difference. First operand 199 states and 265 transitions. Second operand has 65 states, 63 states have (on average 2.5238095238095237) internal successors, (159), 62 states have internal predecessors, (159), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-20 07:34:25,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:34:25,150 INFO L93 Difference]: Finished difference Result 1349 states and 1929 transitions. [2023-12-20 07:34:25,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2023-12-20 07:34:25,152 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 63 states have (on average 2.5238095238095237) internal successors, (159), 62 states have internal predecessors, (159), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 134 [2023-12-20 07:34:25,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:34:25,156 INFO L225 Difference]: With dead ends: 1349 [2023-12-20 07:34:25,156 INFO L226 Difference]: Without dead ends: 1078 [2023-12-20 07:34:25,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15411 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2142, Invalid=41330, Unknown=0, NotChecked=0, Total=43472 [2023-12-20 07:34:25,172 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 437 mSDsluCounter, 1501 mSDsCounter, 0 mSdLazyCounter, 4285 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 1562 SdHoareTripleChecker+Invalid, 4386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 4285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-20 07:34:25,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 1562 Invalid, 4386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 4285 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-20 07:34:25,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2023-12-20 07:34:25,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 747. [2023-12-20 07:34:25,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 722 states have (on average 1.3490304709141274) internal successors, (974), 729 states have internal predecessors, (974), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (50), 11 states have call predecessors, (50), 12 states have call successors, (50) [2023-12-20 07:34:25,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1036 transitions. [2023-12-20 07:34:25,265 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1036 transitions. Word has length 134 [2023-12-20 07:34:25,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:34:25,266 INFO L495 AbstractCegarLoop]: Abstraction has 747 states and 1036 transitions. [2023-12-20 07:34:25,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 63 states have (on average 2.5238095238095237) internal successors, (159), 62 states have internal predecessors, (159), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-20 07:34:25,266 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1036 transitions. [2023-12-20 07:34:25,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-12-20 07:34:25,270 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:25,270 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 10, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:25,284 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 07:34:25,480 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,SelfDestructingSolverStorable10 [2023-12-20 07:34:25,480 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:25,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:25,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1393480830, now seen corresponding path program 2 times [2023-12-20 07:34:25,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:25,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400427809] [2023-12-20 07:34:25,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:25,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:28,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 07:34:28,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:28,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-12-20 07:34:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:28,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-12-20 07:34:28,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 323 proven. 1012 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-12-20 07:34:28,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:28,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400427809] [2023-12-20 07:34:28,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400427809] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:34:28,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671175779] [2023-12-20 07:34:28,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:34:28,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:28,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:28,985 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 07:34:29,008 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 07:34:29,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:34:29,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:34:29,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 121 conjunts are in the unsatisfiable core [2023-12-20 07:34:29,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:34:29,405 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:34:29,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2023-12-20 07:34:29,460 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:34:29,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-12-20 07:34:29,522 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:34:29,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-12-20 07:34:29,606 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:34:29,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-12-20 07:34:29,662 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:34:29,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-12-20 07:34:29,722 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:34:29,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-12-20 07:34:29,783 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:34:29,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-12-20 07:34:29,861 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:34:29,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-12-20 07:34:29,920 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:34:29,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 32 [2023-12-20 07:34:29,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:34:29,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 18 [2023-12-20 07:34:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 673 proven. 685 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2023-12-20 07:34:30,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:34:32,497 INFO L349 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2023-12-20 07:34:32,497 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 26 treesize of output 25 [2023-12-20 07:34:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 689 proven. 613 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2023-12-20 07:34:33,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671175779] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:34:33,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:34:33,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 48, 36] total 98 [2023-12-20 07:34:33,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586965823] [2023-12-20 07:34:33,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:34:33,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-12-20 07:34:33,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:34:33,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-12-20 07:34:33,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=9044, Unknown=0, NotChecked=0, Total=9506 [2023-12-20 07:34:33,137 INFO L87 Difference]: Start difference. First operand 747 states and 1036 transitions. Second operand has 98 states, 98 states have (on average 2.122448979591837) internal successors, (208), 96 states have internal predecessors, (208), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-20 07:34:38,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:34:38,081 INFO L93 Difference]: Finished difference Result 3232 states and 4651 transitions. [2023-12-20 07:34:38,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-12-20 07:34:38,082 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.122448979591837) internal successors, (208), 96 states have internal predecessors, (208), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 134 [2023-12-20 07:34:38,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:34:38,096 INFO L225 Difference]: With dead ends: 3232 [2023-12-20 07:34:38,097 INFO L226 Difference]: Without dead ends: 2372 [2023-12-20 07:34:38,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4701 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1017, Invalid=16539, Unknown=0, NotChecked=0, Total=17556 [2023-12-20 07:34:38,101 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 150 mSDsluCounter, 3146 mSDsCounter, 0 mSdLazyCounter, 6675 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 3216 SdHoareTripleChecker+Invalid, 6698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 6675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-12-20 07:34:38,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 3216 Invalid, 6698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 6675 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-12-20 07:34:38,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2372 states. [2023-12-20 07:34:38,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2372 to 1491. [2023-12-20 07:34:38,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1445 states have (on average 1.3370242214532873) internal successors, (1932), 1456 states have internal predecessors, (1932), 23 states have call successors, (23), 13 states have call predecessors, (23), 22 states have return successors, (121), 21 states have call predecessors, (121), 23 states have call successors, (121) [2023-12-20 07:34:38,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 2076 transitions. [2023-12-20 07:34:38,235 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 2076 transitions. Word has length 134 [2023-12-20 07:34:38,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:34:38,235 INFO L495 AbstractCegarLoop]: Abstraction has 1491 states and 2076 transitions. [2023-12-20 07:34:38,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.122448979591837) internal successors, (208), 96 states have internal predecessors, (208), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-20 07:34:38,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 2076 transitions. [2023-12-20 07:34:38,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-12-20 07:34:38,242 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:38,242 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 10, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:38,248 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 07:34:38,448 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,SelfDestructingSolverStorable11 [2023-12-20 07:34:38,448 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:38,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:38,448 INFO L85 PathProgramCache]: Analyzing trace with hash -318700998, now seen corresponding path program 3 times [2023-12-20 07:34:38,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:38,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5226183] [2023-12-20 07:34:38,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:38,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:41,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 07:34:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:41,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-12-20 07:34:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:41,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-12-20 07:34:41,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 323 proven. 1014 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2023-12-20 07:34:42,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:42,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5226183] [2023-12-20 07:34:42,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5226183] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:34:42,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674186433] [2023-12-20 07:34:42,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:34:42,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:42,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:42,096 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 07:34:42,113 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 07:34:43,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-12-20 07:34:43,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:34:43,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 90 conjunts are in the unsatisfiable core [2023-12-20 07:34:43,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:34:44,259 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-12-20 07:34:44,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-12-20 07:34:44,348 INFO L349 Elim1Store]: treesize reduction 99, result has 28.3 percent of original size [2023-12-20 07:34:44,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 56 treesize of output 70 [2023-12-20 07:34:44,739 INFO L349 Elim1Store]: treesize reduction 236, result has 48.7 percent of original size [2023-12-20 07:34:44,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 121 treesize of output 285 [2023-12-20 07:36:55,662 WARN L293 SmtUtils]: Spent 26.85s on a formula simplification. DAG size of input: 3284 DAG size of output: 3284 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-20 07:38:21,375 WARN L293 SmtUtils]: Spent 24.72s on a formula simplification. DAG size of input: 2100 DAG size of output: 2161 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-20 07:38:41,137 WARN L293 SmtUtils]: Spent 12.67s on a formula simplification. DAG size of input: 1637 DAG size of output: 1492 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-20 07:39:23,371 WARN L293 SmtUtils]: Spent 9.01s on a formula simplification that was a NOOP. DAG size: 2051 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-20 07:40:17,086 WARN L293 SmtUtils]: Spent 12.69s on a formula simplification that was a NOOP. DAG size: 1202 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 07:40:58,006 INFO L224 Elim1Store]: Index analysis took 275 ms