/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de61.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 22:04:21,077 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 22:04:21,146 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 22:04:21,149 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 22:04:21,150 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 22:04:21,171 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 22:04:21,172 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 22:04:21,172 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 22:04:21,173 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 22:04:21,176 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 22:04:21,176 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 22:04:21,176 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 22:04:21,176 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 22:04:21,177 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 22:04:21,177 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 22:04:21,177 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 22:04:21,178 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 22:04:21,178 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 22:04:21,178 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 22:04:21,179 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 22:04:21,179 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 22:04:21,179 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 22:04:21,179 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 22:04:21,179 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 22:04:21,180 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 22:04:21,180 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 22:04:21,180 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 22:04:21,180 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 22:04:21,180 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 22:04:21,181 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 22:04:21,181 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 22:04:21,181 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 22:04:21,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 22:04:21,182 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 22:04:21,182 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 22:04:21,182 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 22:04:21,182 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 22:04:21,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 22:04:21,182 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 22:04:21,182 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 22:04:21,182 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 22:04:21,183 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 22:04:21,183 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 22:04:21,183 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 22:04:21,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 22:04:21,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 22:04:21,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 22:04:21,369 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 22:04:21,370 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 22:04:21,370 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de61.c [2023-12-15 22:04:22,472 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 22:04:22,581 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 22:04:22,582 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de61.c [2023-12-15 22:04:22,587 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/315831e48/a989c4425ffb4367ba96d9c8d24543ef/FLAGded3eb8a7 [2023-12-15 22:04:22,599 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/315831e48/a989c4425ffb4367ba96d9c8d24543ef [2023-12-15 22:04:22,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 22:04:22,601 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 22:04:22,602 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 22:04:22,602 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 22:04:22,605 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 22:04:22,605 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:04:22" (1/1) ... [2023-12-15 22:04:22,606 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7557b441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:22, skipping insertion in model container [2023-12-15 22:04:22,606 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:04:22" (1/1) ... [2023-12-15 22:04:22,621 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 22:04:22,732 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de61.c[368,381] [2023-12-15 22:04:22,744 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 22:04:22,750 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 22:04:22,759 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de61.c[368,381] [2023-12-15 22:04:22,762 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 22:04:22,773 INFO L206 MainTranslator]: Completed translation [2023-12-15 22:04:22,773 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:22 WrapperNode [2023-12-15 22:04:22,773 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 22:04:22,775 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 22:04:22,775 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 22:04:22,775 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 22:04:22,780 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:22" (1/1) ... [2023-12-15 22:04:22,783 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:22" (1/1) ... [2023-12-15 22:04:22,795 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2023-12-15 22:04:22,795 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 22:04:22,796 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 22:04:22,796 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 22:04:22,796 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 22:04:22,802 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:22" (1/1) ... [2023-12-15 22:04:22,802 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:22" (1/1) ... [2023-12-15 22:04:22,803 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:22" (1/1) ... [2023-12-15 22:04:22,810 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-15 22:04:22,810 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:22" (1/1) ... [2023-12-15 22:04:22,810 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:22" (1/1) ... [2023-12-15 22:04:22,811 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:22" (1/1) ... [2023-12-15 22:04:22,821 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:22" (1/1) ... [2023-12-15 22:04:22,821 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:22" (1/1) ... [2023-12-15 22:04:22,822 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:22" (1/1) ... [2023-12-15 22:04:22,823 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 22:04:22,823 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 22:04:22,823 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 22:04:22,823 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 22:04:22,824 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:22" (1/1) ... [2023-12-15 22:04:22,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 22:04:22,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:04:22,843 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-15 22:04:22,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-15 22:04:22,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 22:04:22,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 22:04:22,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 22:04:22,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 22:04:22,932 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 22:04:22,934 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 22:04:23,067 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 22:04:23,081 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 22:04:23,081 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-12-15 22:04:23,081 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:04:23 BoogieIcfgContainer [2023-12-15 22:04:23,081 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 22:04:23,083 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 22:04:23,083 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 22:04:23,085 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 22:04:23,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:04:22" (1/3) ... [2023-12-15 22:04:23,086 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e7e7c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:04:23, skipping insertion in model container [2023-12-15 22:04:23,086 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:22" (2/3) ... [2023-12-15 22:04:23,086 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e7e7c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:04:23, skipping insertion in model container [2023-12-15 22:04:23,086 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:04:23" (3/3) ... [2023-12-15 22:04:23,087 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de61.c [2023-12-15 22:04:23,098 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 22:04:23,098 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 22:04:23,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 22:04:23,129 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;@5cf6f8ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 22:04:23,130 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 22:04:23,132 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:23,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-15 22:04:23,136 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:23,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:04:23,137 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:23,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:23,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1862478825, now seen corresponding path program 1 times [2023-12-15 22:04:23,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:23,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89298871] [2023-12-15 22:04:23,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:23,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:23,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:23,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89298871] [2023-12-15 22:04:23,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89298871] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 22:04:23,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 22:04:23,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 22:04:23,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709497855] [2023-12-15 22:04:23,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:04:23,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-15 22:04:23,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:23,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-15 22:04:23,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 22:04:23,271 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:23,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:23,301 INFO L93 Difference]: Finished difference Result 26 states and 48 transitions. [2023-12-15 22:04:23,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-15 22:04:23,303 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-15 22:04:23,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:23,308 INFO L225 Difference]: With dead ends: 26 [2023-12-15 22:04:23,308 INFO L226 Difference]: Without dead ends: 12 [2023-12-15 22:04:23,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 22:04:23,312 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:04:23,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:04:23,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-12-15 22:04:23,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-12-15 22:04:23,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:23,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2023-12-15 22:04:23,332 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 11 [2023-12-15 22:04:23,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:23,332 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2023-12-15 22:04:23,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:23,333 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2023-12-15 22:04:23,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-15 22:04:23,333 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:23,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:04:23,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-15 22:04:23,334 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:23,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:23,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1976995429, now seen corresponding path program 1 times [2023-12-15 22:04:23,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:23,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299713583] [2023-12-15 22:04:23,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:23,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:23,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:23,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299713583] [2023-12-15 22:04:23,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299713583] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 22:04:23,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 22:04:23,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-15 22:04:23,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052580599] [2023-12-15 22:04:23,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:04:23,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 22:04:23,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:23,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 22:04:23,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-15 22:04:23,819 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:23,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:23,943 INFO L93 Difference]: Finished difference Result 30 states and 45 transitions. [2023-12-15 22:04:23,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 22:04:23,944 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-15 22:04:23,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:23,944 INFO L225 Difference]: With dead ends: 30 [2023-12-15 22:04:23,944 INFO L226 Difference]: Without dead ends: 13 [2023-12-15 22:04:23,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-12-15 22:04:23,945 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:04:23,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 31 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:04:23,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-12-15 22:04:23,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-12-15 22:04:23,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:23,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2023-12-15 22:04:23,948 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 11 [2023-12-15 22:04:23,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:23,948 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2023-12-15 22:04:23,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:23,949 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2023-12-15 22:04:23,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-15 22:04:23,949 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:23,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:04:23,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-15 22:04:23,949 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:23,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:23,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1296164696, now seen corresponding path program 1 times [2023-12-15 22:04:23,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:23,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475788852] [2023-12-15 22:04:23,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:23,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:24,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:24,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:24,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475788852] [2023-12-15 22:04:24,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475788852] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:04:24,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840401832] [2023-12-15 22:04:24,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:24,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:24,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:04:24,057 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:04:24,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 22:04:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:24,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-15 22:04:24,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:04:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:24,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:04:24,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:24,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840401832] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:04:24,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:04:24,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-12-15 22:04:24,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781275212] [2023-12-15 22:04:24,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:04:24,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-15 22:04:24,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:24,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-15 22:04:24,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-12-15 22:04:24,171 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:24,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:24,336 INFO L93 Difference]: Finished difference Result 57 states and 93 transitions. [2023-12-15 22:04:24,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-15 22:04:24,339 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-15 22:04:24,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:24,340 INFO L225 Difference]: With dead ends: 57 [2023-12-15 22:04:24,340 INFO L226 Difference]: Without dead ends: 49 [2023-12-15 22:04:24,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-12-15 22:04:24,342 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:04:24,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 54 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:04:24,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-12-15 22:04:24,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2023-12-15 22:04:24,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:24,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 54 transitions. [2023-12-15 22:04:24,351 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 54 transitions. Word has length 12 [2023-12-15 22:04:24,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:24,353 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 54 transitions. [2023-12-15 22:04:24,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:24,353 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 54 transitions. [2023-12-15 22:04:24,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-15 22:04:24,354 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:24,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:04:24,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-15 22:04:24,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:24,560 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:24,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:24,560 INFO L85 PathProgramCache]: Analyzing trace with hash 886412585, now seen corresponding path program 1 times [2023-12-15 22:04:24,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:24,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593479715] [2023-12-15 22:04:24,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:24,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:24,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:24,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:24,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593479715] [2023-12-15 22:04:24,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593479715] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:04:24,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663396673] [2023-12-15 22:04:24,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:24,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:24,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:04:24,693 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:04:24,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 22:04:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:24,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 22:04:24,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:04:24,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 22:04:24,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:04:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 22:04:24,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663396673] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:04:24,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:04:24,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-12-15 22:04:24,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312739739] [2023-12-15 22:04:24,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:04:24,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-15 22:04:24,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:24,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-15 22:04:24,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-12-15 22:04:24,833 INFO L87 Difference]: Start difference. First operand 36 states and 54 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:25,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:25,025 INFO L93 Difference]: Finished difference Result 106 states and 150 transitions. [2023-12-15 22:04:25,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-15 22:04:25,026 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-15 22:04:25,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:25,029 INFO L225 Difference]: With dead ends: 106 [2023-12-15 22:04:25,029 INFO L226 Difference]: Without dead ends: 86 [2023-12-15 22:04:25,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-12-15 22:04:25,032 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 54 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:04:25,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 98 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:04:25,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-15 22:04:25,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 48. [2023-12-15 22:04:25,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.446808510638298) internal successors, (68), 47 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:25,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2023-12-15 22:04:25,050 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 14 [2023-12-15 22:04:25,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:25,050 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2023-12-15 22:04:25,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:25,050 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2023-12-15 22:04:25,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-15 22:04:25,050 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:25,050 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:04:25,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-15 22:04:25,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-15 22:04:25,255 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:25,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:25,256 INFO L85 PathProgramCache]: Analyzing trace with hash -948471589, now seen corresponding path program 2 times [2023-12-15 22:04:25,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:25,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262787097] [2023-12-15 22:04:25,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:25,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:25,317 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:25,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:25,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262787097] [2023-12-15 22:04:25,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262787097] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:04:25,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364111490] [2023-12-15 22:04:25,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 22:04:25,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:25,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:04:25,319 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:04:25,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 22:04:25,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 22:04:25,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:04:25,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-15 22:04:25,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:04:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:25,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:04:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:25,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364111490] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:04:25,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:04:25,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-12-15 22:04:25,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857408138] [2023-12-15 22:04:25,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:04:25,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-15 22:04:25,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:25,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-15 22:04:25,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-12-15 22:04:25,434 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:26,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:26,016 INFO L93 Difference]: Finished difference Result 187 states and 306 transitions. [2023-12-15 22:04:26,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-15 22:04:26,016 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-15 22:04:26,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:26,017 INFO L225 Difference]: With dead ends: 187 [2023-12-15 22:04:26,017 INFO L226 Difference]: Without dead ends: 173 [2023-12-15 22:04:26,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2023-12-15 22:04:26,018 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 263 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 22:04:26,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 183 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 22:04:26,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-12-15 22:04:26,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 105. [2023-12-15 22:04:26,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.5) internal successors, (156), 104 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:26,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 156 transitions. [2023-12-15 22:04:26,035 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 156 transitions. Word has length 15 [2023-12-15 22:04:26,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:26,035 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 156 transitions. [2023-12-15 22:04:26,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:26,036 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 156 transitions. [2023-12-15 22:04:26,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-15 22:04:26,036 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:26,036 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:04:26,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-15 22:04:26,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:26,242 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:26,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:26,242 INFO L85 PathProgramCache]: Analyzing trace with hash 456382938, now seen corresponding path program 1 times [2023-12-15 22:04:26,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:26,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267598184] [2023-12-15 22:04:26,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:26,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:26,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:26,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267598184] [2023-12-15 22:04:26,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267598184] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:04:26,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926816862] [2023-12-15 22:04:26,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:26,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:26,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:04:26,657 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:04:26,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-15 22:04:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:26,691 WARN L260 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-15 22:04:26,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:04:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:26,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:04:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:27,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926816862] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:04:27,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:04:27,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2023-12-15 22:04:27,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003725438] [2023-12-15 22:04:27,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:04:27,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-15 22:04:27,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:27,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-15 22:04:27,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2023-12-15 22:04:27,181 INFO L87 Difference]: Start difference. First operand 105 states and 156 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:28,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:28,767 INFO L93 Difference]: Finished difference Result 195 states and 272 transitions. [2023-12-15 22:04:28,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-15 22:04:28,768 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-15 22:04:28,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:28,769 INFO L225 Difference]: With dead ends: 195 [2023-12-15 22:04:28,769 INFO L226 Difference]: Without dead ends: 183 [2023-12-15 22:04:28,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=469, Invalid=2287, Unknown=0, NotChecked=0, Total=2756 [2023-12-15 22:04:28,770 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 117 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-15 22:04:28,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 71 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-15 22:04:28,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-12-15 22:04:28,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 117. [2023-12-15 22:04:28,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.5172413793103448) internal successors, (176), 116 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:28,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 176 transitions. [2023-12-15 22:04:28,827 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 176 transitions. Word has length 17 [2023-12-15 22:04:28,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:28,827 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 176 transitions. [2023-12-15 22:04:28,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:28,828 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 176 transitions. [2023-12-15 22:04:28,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-15 22:04:28,828 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:28,829 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:04:28,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-15 22:04:29,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:29,034 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:29,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:29,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1016533723, now seen corresponding path program 2 times [2023-12-15 22:04:29,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:29,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887649825] [2023-12-15 22:04:29,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:29,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:29,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:29,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:29,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887649825] [2023-12-15 22:04:29,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887649825] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:04:29,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116109063] [2023-12-15 22:04:29,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 22:04:29,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:29,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:04:29,130 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:04:29,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-15 22:04:29,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 22:04:29,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:04:29,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-15 22:04:29,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:04:29,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 22:04:29,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:04:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 22:04:29,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116109063] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:04:29,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:04:29,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2023-12-15 22:04:29,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286015997] [2023-12-15 22:04:29,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:04:29,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-15 22:04:29,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:29,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-15 22:04:29,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-12-15 22:04:29,283 INFO L87 Difference]: Start difference. First operand 117 states and 176 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:29,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:29,873 INFO L93 Difference]: Finished difference Result 325 states and 454 transitions. [2023-12-15 22:04:29,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-15 22:04:29,874 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-15 22:04:29,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:29,875 INFO L225 Difference]: With dead ends: 325 [2023-12-15 22:04:29,875 INFO L226 Difference]: Without dead ends: 288 [2023-12-15 22:04:29,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=1553, Unknown=0, NotChecked=0, Total=1806 [2023-12-15 22:04:29,876 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 213 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 22:04:29,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 124 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 22:04:29,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-12-15 22:04:29,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 136. [2023-12-15 22:04:29,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.5037037037037038) internal successors, (203), 135 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:29,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 203 transitions. [2023-12-15 22:04:29,912 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 203 transitions. Word has length 17 [2023-12-15 22:04:29,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:29,912 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 203 transitions. [2023-12-15 22:04:29,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:29,912 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 203 transitions. [2023-12-15 22:04:29,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-15 22:04:29,916 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:29,916 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:04:29,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-15 22:04:30,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:30,122 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:30,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:30,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1577282436, now seen corresponding path program 2 times [2023-12-15 22:04:30,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:30,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989868885] [2023-12-15 22:04:30,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:30,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 22:04:30,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:30,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989868885] [2023-12-15 22:04:30,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989868885] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:04:30,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269557401] [2023-12-15 22:04:30,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 22:04:30,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:30,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:04:30,231 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:04:30,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-15 22:04:30,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 22:04:30,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:04:30,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-15 22:04:30,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:04:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 22:04:30,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:04:30,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 22:04:30,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269557401] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:04:30,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:04:30,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-12-15 22:04:30,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234858658] [2023-12-15 22:04:30,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:04:30,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 22:04:30,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:30,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 22:04:30,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 22:04:30,316 INFO L87 Difference]: Start difference. First operand 136 states and 203 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:30,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:30,368 INFO L93 Difference]: Finished difference Result 217 states and 315 transitions. [2023-12-15 22:04:30,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 22:04:30,369 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-15 22:04:30,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:30,370 INFO L225 Difference]: With dead ends: 217 [2023-12-15 22:04:30,370 INFO L226 Difference]: Without dead ends: 162 [2023-12-15 22:04:30,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 22:04:30,371 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:04:30,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 50 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:04:30,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-12-15 22:04:30,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 126. [2023-12-15 22:04:30,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.44) internal successors, (180), 125 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:30,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2023-12-15 22:04:30,398 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 19 [2023-12-15 22:04:30,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:30,398 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2023-12-15 22:04:30,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:30,398 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2023-12-15 22:04:30,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-15 22:04:30,400 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:30,400 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:04:30,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-15 22:04:30,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:30,605 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:30,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:30,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1498581513, now seen corresponding path program 1 times [2023-12-15 22:04:30,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:30,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551006568] [2023-12-15 22:04:30,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:30,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-15 22:04:30,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:30,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551006568] [2023-12-15 22:04:30,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551006568] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:04:30,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000606525] [2023-12-15 22:04:30,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:30,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:30,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:04:30,673 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:04:30,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-15 22:04:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:30,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-15 22:04:30,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:04:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-15 22:04:30,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:04:30,798 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-15 22:04:30,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000606525] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:04:30,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:04:30,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2023-12-15 22:04:30,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581590754] [2023-12-15 22:04:30,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:04:30,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-15 22:04:30,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:30,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-15 22:04:30,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-12-15 22:04:30,802 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:31,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:31,040 INFO L93 Difference]: Finished difference Result 212 states and 301 transitions. [2023-12-15 22:04:31,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-15 22:04:31,041 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-15 22:04:31,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:31,041 INFO L225 Difference]: With dead ends: 212 [2023-12-15 22:04:31,041 INFO L226 Difference]: Without dead ends: 171 [2023-12-15 22:04:31,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-12-15 22:04:31,043 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 62 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:04:31,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 118 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:04:31,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-12-15 22:04:31,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 127. [2023-12-15 22:04:31,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.4523809523809523) internal successors, (183), 126 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:31,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 183 transitions. [2023-12-15 22:04:31,084 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 183 transitions. Word has length 20 [2023-12-15 22:04:31,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:31,084 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 183 transitions. [2023-12-15 22:04:31,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:31,084 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 183 transitions. [2023-12-15 22:04:31,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-15 22:04:31,085 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:31,085 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:04:31,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-15 22:04:31,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:31,291 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:31,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:31,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1433121687, now seen corresponding path program 3 times [2023-12-15 22:04:31,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:31,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102316822] [2023-12-15 22:04:31,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:31,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:31,429 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:31,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:31,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102316822] [2023-12-15 22:04:31,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102316822] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:04:31,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793293089] [2023-12-15 22:04:31,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 22:04:31,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:31,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:04:31,431 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:04:31,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-15 22:04:31,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-15 22:04:31,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:04:31,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-15 22:04:31,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:04:31,572 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 22:04:31,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:04:31,733 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 22:04:31,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793293089] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:04:31,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:04:31,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2023-12-15 22:04:31,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096254273] [2023-12-15 22:04:31,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:04:31,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-15 22:04:31,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:31,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-15 22:04:31,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2023-12-15 22:04:31,734 INFO L87 Difference]: Start difference. First operand 127 states and 183 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:34,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:34,073 INFO L93 Difference]: Finished difference Result 407 states and 557 transitions. [2023-12-15 22:04:34,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-12-15 22:04:34,074 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-15 22:04:34,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:34,075 INFO L225 Difference]: With dead ends: 407 [2023-12-15 22:04:34,075 INFO L226 Difference]: Without dead ends: 360 [2023-12-15 22:04:34,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2820 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=875, Invalid=8827, Unknown=0, NotChecked=0, Total=9702 [2023-12-15 22:04:34,077 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 301 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-15 22:04:34,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 419 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1433 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-15 22:04:34,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2023-12-15 22:04:34,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 151. [2023-12-15 22:04:34,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.46) internal successors, (219), 150 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:34,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 219 transitions. [2023-12-15 22:04:34,128 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 219 transitions. Word has length 20 [2023-12-15 22:04:34,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:34,128 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 219 transitions. [2023-12-15 22:04:34,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:34,128 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 219 transitions. [2023-12-15 22:04:34,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-15 22:04:34,129 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:34,129 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:04:34,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-15 22:04:34,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-15 22:04:34,334 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:34,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:34,334 INFO L85 PathProgramCache]: Analyzing trace with hash 255160329, now seen corresponding path program 2 times [2023-12-15 22:04:34,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:34,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845559499] [2023-12-15 22:04:34,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:34,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:34,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 22:04:34,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:34,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845559499] [2023-12-15 22:04:34,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845559499] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:04:34,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197830075] [2023-12-15 22:04:34,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 22:04:34,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:34,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:04:34,417 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:04:34,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-15 22:04:34,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 22:04:34,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:04:34,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-15 22:04:34,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:04:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 22:04:34,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:04:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-15 22:04:34,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197830075] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:04:34,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:04:34,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 4] total 13 [2023-12-15 22:04:34,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987770586] [2023-12-15 22:04:34,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:04:34,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-15 22:04:34,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:34,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-15 22:04:34,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-12-15 22:04:34,505 INFO L87 Difference]: Start difference. First operand 151 states and 219 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:34,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:34,984 INFO L93 Difference]: Finished difference Result 301 states and 447 transitions. [2023-12-15 22:04:34,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-15 22:04:34,985 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-15 22:04:34,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:34,986 INFO L225 Difference]: With dead ends: 301 [2023-12-15 22:04:34,986 INFO L226 Difference]: Without dead ends: 275 [2023-12-15 22:04:34,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2023-12-15 22:04:34,987 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 72 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 22:04:34,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 219 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 22:04:34,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-12-15 22:04:35,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 197. [2023-12-15 22:04:35,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.4489795918367347) internal successors, (284), 196 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:35,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 284 transitions. [2023-12-15 22:04:35,044 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 284 transitions. Word has length 20 [2023-12-15 22:04:35,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:35,044 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 284 transitions. [2023-12-15 22:04:35,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:35,044 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 284 transitions. [2023-12-15 22:04:35,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-15 22:04:35,045 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:35,045 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:04:35,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-15 22:04:35,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:35,250 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:35,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:35,250 INFO L85 PathProgramCache]: Analyzing trace with hash -913992165, now seen corresponding path program 3 times [2023-12-15 22:04:35,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:35,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907334876] [2023-12-15 22:04:35,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:35,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-15 22:04:35,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:35,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907334876] [2023-12-15 22:04:35,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907334876] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:04:35,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928217867] [2023-12-15 22:04:35,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 22:04:35,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:35,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:04:35,355 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:04:35,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-15 22:04:35,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-15 22:04:35,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:04:35,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-15 22:04:35,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:04:35,402 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-15 22:04:35,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:04:35,430 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-15 22:04:35,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928217867] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:04:35,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:04:35,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-12-15 22:04:35,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488472350] [2023-12-15 22:04:35,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:04:35,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-15 22:04:35,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:35,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-15 22:04:35,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-15 22:04:35,431 INFO L87 Difference]: Start difference. First operand 197 states and 284 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:35,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:35,597 INFO L93 Difference]: Finished difference Result 302 states and 419 transitions. [2023-12-15 22:04:35,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-15 22:04:35,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-12-15 22:04:35,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:35,599 INFO L225 Difference]: With dead ends: 302 [2023-12-15 22:04:35,599 INFO L226 Difference]: Without dead ends: 291 [2023-12-15 22:04:35,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-15 22:04:35,599 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:04:35,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 69 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:04:35,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2023-12-15 22:04:35,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 212. [2023-12-15 22:04:35,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.4265402843601895) internal successors, (301), 211 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:35,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 301 transitions. [2023-12-15 22:04:35,669 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 301 transitions. Word has length 21 [2023-12-15 22:04:35,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:35,669 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 301 transitions. [2023-12-15 22:04:35,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:35,670 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 301 transitions. [2023-12-15 22:04:35,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-15 22:04:35,670 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:35,670 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:04:35,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-15 22:04:35,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-15 22:04:35,889 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:35,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:35,889 INFO L85 PathProgramCache]: Analyzing trace with hash 521992123, now seen corresponding path program 3 times [2023-12-15 22:04:35,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:35,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385414030] [2023-12-15 22:04:35,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:35,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:36,031 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:36,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:36,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385414030] [2023-12-15 22:04:36,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385414030] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:04:36,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636419317] [2023-12-15 22:04:36,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 22:04:36,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:36,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:04:36,033 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:04:36,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-15 22:04:36,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-15 22:04:36,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:04:36,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-15 22:04:36,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:04:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:36,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:04:36,333 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:36,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636419317] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:04:36,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:04:36,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2023-12-15 22:04:36,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572782811] [2023-12-15 22:04:36,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:04:36,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-15 22:04:36,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:36,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-15 22:04:36,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2023-12-15 22:04:36,335 INFO L87 Difference]: Start difference. First operand 212 states and 301 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:51,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:51,551 INFO L93 Difference]: Finished difference Result 738 states and 1186 transitions. [2023-12-15 22:04:51,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-12-15 22:04:51,551 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-12-15 22:04:51,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:51,553 INFO L225 Difference]: With dead ends: 738 [2023-12-15 22:04:51,553 INFO L226 Difference]: Without dead ends: 681 [2023-12-15 22:04:51,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=1363, Invalid=3059, Unknown=0, NotChecked=0, Total=4422 [2023-12-15 22:04:51,555 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 938 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-15 22:04:51,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [938 Valid, 716 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-15 22:04:51,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2023-12-15 22:04:51,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 325. [2023-12-15 22:04:51,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.4876543209876543) internal successors, (482), 324 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:51,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 482 transitions. [2023-12-15 22:04:51,689 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 482 transitions. Word has length 21 [2023-12-15 22:04:51,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:51,689 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 482 transitions. [2023-12-15 22:04:51,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:51,689 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 482 transitions. [2023-12-15 22:04:51,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-15 22:04:51,689 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:51,689 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:04:51,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-15 22:04:51,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-15 22:04:51,894 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:51,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:51,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1673899067, now seen corresponding path program 4 times [2023-12-15 22:04:51,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:51,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525996198] [2023-12-15 22:04:51,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:51,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 22:04:52,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:52,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525996198] [2023-12-15 22:04:52,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525996198] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:04:52,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969997748] [2023-12-15 22:04:52,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 22:04:52,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:52,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:04:52,284 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) [2023-12-15 22:04:52,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-15 22:04:52,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 22:04:52,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:04:52,358 WARN L260 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-15 22:04:52,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:04:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:52,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:04:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:53,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969997748] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:04:53,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:04:53,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 15] total 38 [2023-12-15 22:04:53,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066672219] [2023-12-15 22:04:53,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:04:53,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-15 22:04:53,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:53,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-15 22:04:53,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1238, Unknown=0, NotChecked=0, Total=1482 [2023-12-15 22:04:53,202 INFO L87 Difference]: Start difference. First operand 325 states and 482 transitions. Second operand has 39 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 38 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:55,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:55,943 INFO L93 Difference]: Finished difference Result 465 states and 649 transitions. [2023-12-15 22:04:55,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-12-15 22:04:55,944 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 38 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-15 22:04:55,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:55,945 INFO L225 Difference]: With dead ends: 465 [2023-12-15 22:04:55,945 INFO L226 Difference]: Without dead ends: 380 [2023-12-15 22:04:55,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=857, Invalid=4255, Unknown=0, NotChecked=0, Total=5112 [2023-12-15 22:04:55,948 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 149 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-15 22:04:55,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 91 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-15 22:04:55,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-12-15 22:04:56,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 295. [2023-12-15 22:04:56,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.4625850340136055) internal successors, (430), 294 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:56,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 430 transitions. [2023-12-15 22:04:56,097 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 430 transitions. Word has length 23 [2023-12-15 22:04:56,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:56,097 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 430 transitions. [2023-12-15 22:04:56,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 38 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:56,098 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 430 transitions. [2023-12-15 22:04:56,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-15 22:04:56,099 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:56,099 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:04:56,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-15 22:04:56,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-15 22:04:56,303 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:04:56,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:04:56,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1538122779, now seen corresponding path program 4 times [2023-12-15 22:04:56,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:04:56,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779440714] [2023-12-15 22:04:56,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:04:56,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:04:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:04:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:04:56,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:04:56,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779440714] [2023-12-15 22:04:56,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779440714] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:04:56,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62458128] [2023-12-15 22:04:56,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 22:04:56,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:04:56,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:04:56,438 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:04:56,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-15 22:04:56,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 22:04:56,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:04:56,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-15 22:04:56,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:04:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-15 22:04:56,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:04:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-15 22:04:56,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62458128] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:04:56,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:04:56,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2023-12-15 22:04:56,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231933919] [2023-12-15 22:04:56,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:04:56,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-15 22:04:56,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:04:56,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-15 22:04:56,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2023-12-15 22:04:56,668 INFO L87 Difference]: Start difference. First operand 295 states and 430 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:59,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:04:59,706 INFO L93 Difference]: Finished difference Result 841 states and 1181 transitions. [2023-12-15 22:04:59,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-12-15 22:04:59,707 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-15 22:04:59,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:04:59,709 INFO L225 Difference]: With dead ends: 841 [2023-12-15 22:04:59,709 INFO L226 Difference]: Without dead ends: 767 [2023-12-15 22:04:59,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 36 SyntacticMatches, 8 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3717 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=926, Invalid=9994, Unknown=0, NotChecked=0, Total=10920 [2023-12-15 22:04:59,711 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 416 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-15 22:04:59,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 320 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-15 22:04:59,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2023-12-15 22:04:59,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 343. [2023-12-15 22:04:59,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 1.476608187134503) internal successors, (505), 342 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:59,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 505 transitions. [2023-12-15 22:04:59,904 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 505 transitions. Word has length 23 [2023-12-15 22:04:59,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:04:59,905 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 505 transitions. [2023-12-15 22:04:59,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:04:59,905 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 505 transitions. [2023-12-15 22:04:59,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-15 22:04:59,906 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:04:59,906 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:04:59,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-15 22:05:00,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-15 22:05:00,111 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:05:00,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:05:00,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1181574022, now seen corresponding path program 5 times [2023-12-15 22:05:00,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:05:00,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976941773] [2023-12-15 22:05:00,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:05:00,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:05:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:05:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-15 22:05:00,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:05:00,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976941773] [2023-12-15 22:05:00,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976941773] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:05:00,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404794489] [2023-12-15 22:05:00,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 22:05:00,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:05:00,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:05:00,222 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:05:00,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-15 22:05:00,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-15 22:05:00,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:05:00,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-15 22:05:00,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:05:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-15 22:05:00,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:05:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-15 22:05:00,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404794489] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:05:00,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:05:00,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 12 [2023-12-15 22:05:00,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434355078] [2023-12-15 22:05:00,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:05:00,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-15 22:05:00,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:05:00,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-15 22:05:00,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-15 22:05:00,341 INFO L87 Difference]: Start difference. First operand 343 states and 505 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:05:00,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:05:00,848 INFO L93 Difference]: Finished difference Result 582 states and 827 transitions. [2023-12-15 22:05:00,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-15 22:05:00,852 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-15 22:05:00,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:05:00,854 INFO L225 Difference]: With dead ends: 582 [2023-12-15 22:05:00,854 INFO L226 Difference]: Without dead ends: 559 [2023-12-15 22:05:00,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-12-15 22:05:00,855 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 62 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:05:00,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 194 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:05:00,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2023-12-15 22:05:01,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 344. [2023-12-15 22:05:01,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 1.466472303206997) internal successors, (503), 343 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:05:01,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 503 transitions. [2023-12-15 22:05:01,066 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 503 transitions. Word has length 25 [2023-12-15 22:05:01,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:05:01,066 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 503 transitions. [2023-12-15 22:05:01,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:05:01,066 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 503 transitions. [2023-12-15 22:05:01,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-15 22:05:01,066 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:05:01,067 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:05:01,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-15 22:05:01,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:05:01,271 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:05:01,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:05:01,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1244294231, now seen corresponding path program 5 times [2023-12-15 22:05:01,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:05:01,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668768434] [2023-12-15 22:05:01,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:05:01,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:05:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:05:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:05:01,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:05:01,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668768434] [2023-12-15 22:05:01,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668768434] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:05:01,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636435850] [2023-12-15 22:05:01,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 22:05:01,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:05:01,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:05:01,436 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:05:01,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-15 22:05:01,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-15 22:05:01,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:05:01,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-15 22:05:01,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:05:01,682 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:05:01,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:05:01,895 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-15 22:05:01,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636435850] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:05:01,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:05:01,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 13] total 32 [2023-12-15 22:05:01,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820811988] [2023-12-15 22:05:01,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:05:01,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-15 22:05:01,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:05:01,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-15 22:05:01,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=776, Unknown=0, NotChecked=0, Total=992 [2023-12-15 22:05:01,896 INFO L87 Difference]: Start difference. First operand 344 states and 503 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:05:04,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:05:04,976 INFO L93 Difference]: Finished difference Result 1008 states and 1455 transitions. [2023-12-15 22:05:04,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-12-15 22:05:04,988 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-15 22:05:04,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:05:04,991 INFO L225 Difference]: With dead ends: 1008 [2023-12-15 22:05:04,991 INFO L226 Difference]: Without dead ends: 931 [2023-12-15 22:05:04,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1869, Invalid=6141, Unknown=0, NotChecked=0, Total=8010 [2023-12-15 22:05:04,993 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 575 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 1777 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 2098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 1777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-15 22:05:04,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 476 Invalid, 2098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 1777 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-15 22:05:04,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2023-12-15 22:05:05,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 412. [2023-12-15 22:05:05,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.4768856447688565) internal successors, (607), 411 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:05:05,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 607 transitions. [2023-12-15 22:05:05,282 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 607 transitions. Word has length 26 [2023-12-15 22:05:05,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:05:05,282 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 607 transitions. [2023-12-15 22:05:05,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:05:05,282 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 607 transitions. [2023-12-15 22:05:05,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-15 22:05:05,282 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:05:05,282 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:05:05,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-15 22:05:05,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-15 22:05:05,487 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:05:05,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:05:05,487 INFO L85 PathProgramCache]: Analyzing trace with hash 229787642, now seen corresponding path program 6 times [2023-12-15 22:05:05,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:05:05,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557301437] [2023-12-15 22:05:05,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:05:05,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:05:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:05:05,634 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-15 22:05:05,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:05:05,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557301437] [2023-12-15 22:05:05,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557301437] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:05:05,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196914680] [2023-12-15 22:05:05,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-15 22:05:05,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:05:05,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:05:05,636 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:05:05,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-15 22:05:05,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-15 22:05:05,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:05:05,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-15 22:05:05,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:05:05,763 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 22:05:05,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:05:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 22:05:06,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196914680] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:05:06,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:05:06,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 30 [2023-12-15 22:05:06,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867323339] [2023-12-15 22:05:06,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:05:06,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-15 22:05:06,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:05:06,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-15 22:05:06,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=721, Unknown=0, NotChecked=0, Total=930 [2023-12-15 22:05:06,043 INFO L87 Difference]: Start difference. First operand 412 states and 607 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2023-12-15 22:05:37,033 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 22:05:37,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-12-15 22:05:37,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=1201, Invalid=3769, Unknown=0, NotChecked=0, Total=4970 [2023-12-15 22:05:37,049 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 557 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-15 22:05:37,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 239 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-15 22:05:37,050 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 22:05:37,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-15 22:05:37,077 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 22:05:37,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-15 22:05:37,251 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (412states) and FLOYD_HOARE automaton (currently 54 states, 31 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 71 known predicates. [2023-12-15 22:05:37,255 INFO L445 BasicCegarLoop]: Path program histogram: [6, 5, 3, 2, 1, 1] [2023-12-15 22:05:37,256 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 22:05:37,258 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 10:05:37 BoogieIcfgContainer [2023-12-15 22:05:37,258 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 22:05:37,258 INFO L158 Benchmark]: Toolchain (without parser) took 74657.15ms. Allocated memory was 274.7MB in the beginning and 476.1MB in the end (delta: 201.3MB). Free memory was 223.1MB in the beginning and 428.5MB in the end (delta: -205.4MB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 22:05:37,258 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 188.7MB. Free memory is still 136.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 22:05:37,258 INFO L158 Benchmark]: CACSL2BoogieTranslator took 171.82ms. Allocated memory is still 274.7MB. Free memory was 223.1MB in the beginning and 212.1MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-15 22:05:37,259 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.71ms. Allocated memory is still 274.7MB. Free memory was 212.1MB in the beginning and 210.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-15 22:05:37,259 INFO L158 Benchmark]: Boogie Preprocessor took 26.94ms. Allocated memory is still 274.7MB. Free memory was 210.6MB in the beginning and 209.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 22:05:37,259 INFO L158 Benchmark]: RCFGBuilder took 258.12ms. Allocated memory is still 274.7MB. Free memory was 209.0MB in the beginning and 196.9MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-15 22:05:37,259 INFO L158 Benchmark]: TraceAbstraction took 74175.14ms. Allocated memory was 274.7MB in the beginning and 476.1MB in the end (delta: 201.3MB). Free memory was 195.9MB in the beginning and 428.5MB in the end (delta: -232.6MB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 22:05:37,260 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 188.7MB. Free memory is still 136.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 171.82ms. Allocated memory is still 274.7MB. Free memory was 223.1MB in the beginning and 212.1MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 20.71ms. Allocated memory is still 274.7MB. Free memory was 212.1MB in the beginning and 210.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.94ms. Allocated memory is still 274.7MB. Free memory was 210.6MB in the beginning and 209.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 258.12ms. Allocated memory is still 274.7MB. Free memory was 209.0MB in the beginning and 196.9MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 74175.14ms. Allocated memory was 274.7MB in the beginning and 476.1MB in the end (delta: 201.3MB). Free memory was 195.9MB in the beginning and 428.5MB in the end (delta: -232.6MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 7]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 7). Cancelled while NwaCegarLoop was constructing difference of abstraction (412states) and FLOYD_HOARE automaton (currently 54 states, 31 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 71 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 74.1s, OverallIterations: 18, TraceHistogramMax: 11, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 62.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3884 SdHoareTripleChecker+Valid, 6.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3884 mSDsluCounter, 3489 SdHoareTripleChecker+Invalid, 5.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3081 mSDsCounter, 2049 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9323 IncrementalHoareTripleChecker+Invalid, 11372 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2049 mSolverCounterUnsat, 408 mSDtfsCounter, 9323 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1242 GetRequests, 494 SyntacticMatches, 32 SemanticMatches, 715 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14039 ImplicationChecksByTransitivity, 55.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=412occurred in iteration=17, InterpolantAutomatonStates: 561, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 17 MinimizatonAttempts, 2382 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 662 NumberOfCodeBlocks, 662 NumberOfCodeBlocksAsserted, 59 NumberOfCheckSat, 932 ConstructedInterpolants, 0 QuantifiedInterpolants, 5614 SizeOfPredicates, 25 NumberOfNonLiveVariables, 1360 ConjunctsInSsa, 331 ConjunctsInUnsatCore, 50 InterpolantComputations, 2 PerfectInterpolantSequences, 241/1050 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown