/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de41.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 04:50:06,283 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 04:50:06,352 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 04:50:06,355 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 04:50:06,356 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 04:50:06,382 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 04:50:06,383 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 04:50:06,383 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 04:50:06,383 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 04:50:06,386 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 04:50:06,386 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 04:50:06,387 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 04:50:06,387 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 04:50:06,388 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 04:50:06,388 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 04:50:06,388 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 04:50:06,388 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 04:50:06,388 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 04:50:06,389 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 04:50:06,389 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 04:50:06,389 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 04:50:06,389 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 04:50:06,389 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 04:50:06,390 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 04:50:06,390 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 04:50:06,390 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 04:50:06,390 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 04:50:06,390 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 04:50:06,391 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 04:50:06,391 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 04:50:06,391 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 04:50:06,392 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 04:50:06,392 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 04:50:06,392 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 04:50:06,392 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 04:50:06,392 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 04:50:06,392 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 04:50:06,392 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 04:50:06,392 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 04:50:06,392 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 04:50:06,393 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 04:50:06,393 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 04:50:06,393 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 04:50:06,393 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 04:50:06,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 04:50:06,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 04:50:06,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 04:50:06,597 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 04:50:06,597 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 04:50:06,598 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de41.c [2023-12-21 04:50:07,552 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 04:50:07,678 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 04:50:07,679 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de41.c [2023-12-21 04:50:07,683 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04314c301/61d92929138b4f53b1324c9cb3e13c02/FLAG3d4b412ae [2023-12-21 04:50:07,693 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04314c301/61d92929138b4f53b1324c9cb3e13c02 [2023-12-21 04:50:07,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 04:50:07,696 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 04:50:07,698 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 04:50:07,698 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 04:50:07,701 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 04:50:07,702 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:50:07" (1/1) ... [2023-12-21 04:50:07,702 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fa0612f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:50:07, skipping insertion in model container [2023-12-21 04:50:07,703 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:50:07" (1/1) ... [2023-12-21 04:50:07,717 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 04:50:07,818 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-de41.c[368,381] [2023-12-21 04:50:07,833 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 04:50:07,841 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 04:50:07,849 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-de41.c[368,381] [2023-12-21 04:50:07,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 04:50:07,866 INFO L206 MainTranslator]: Completed translation [2023-12-21 04:50:07,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:50:07 WrapperNode [2023-12-21 04:50:07,867 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 04:50:07,868 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 04:50:07,868 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 04:50:07,868 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 04:50:07,872 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:50:07" (1/1) ... [2023-12-21 04:50:07,883 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:50:07" (1/1) ... [2023-12-21 04:50:07,898 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2023-12-21 04:50:07,899 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 04:50:07,899 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 04:50:07,899 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 04:50:07,899 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 04:50:07,905 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:50:07" (1/1) ... [2023-12-21 04:50:07,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:50:07" (1/1) ... [2023-12-21 04:50:07,911 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:50:07" (1/1) ... [2023-12-21 04:50:07,922 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]. [2023-12-21 04:50:07,922 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:50:07" (1/1) ... [2023-12-21 04:50:07,923 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:50:07" (1/1) ... [2023-12-21 04:50:07,924 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:50:07" (1/1) ... [2023-12-21 04:50:07,929 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:50:07" (1/1) ... [2023-12-21 04:50:07,929 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:50:07" (1/1) ... [2023-12-21 04:50:07,930 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:50:07" (1/1) ... [2023-12-21 04:50:07,931 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 04:50:07,931 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 04:50:07,931 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 04:50:07,931 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 04:50:07,932 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:50:07" (1/1) ... [2023-12-21 04:50:07,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 04:50:07,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:07,955 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) [2023-12-21 04:50:07,959 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 [2023-12-21 04:50:07,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 04:50:07,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 04:50:07,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 04:50:07,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 04:50:08,024 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 04:50:08,026 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 04:50:08,124 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 04:50:08,141 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 04:50:08,142 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-21 04:50:08,142 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:50:08 BoogieIcfgContainer [2023-12-21 04:50:08,142 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 04:50:08,143 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 04:50:08,144 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 04:50:08,148 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 04:50:08,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 04:50:07" (1/3) ... [2023-12-21 04:50:08,149 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496fb40e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:50:08, skipping insertion in model container [2023-12-21 04:50:08,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:50:07" (2/3) ... [2023-12-21 04:50:08,150 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496fb40e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:50:08, skipping insertion in model container [2023-12-21 04:50:08,150 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:50:08" (3/3) ... [2023-12-21 04:50:08,151 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de41.c [2023-12-21 04:50:08,162 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 04:50:08,162 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 04:50:08,187 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 04:50:08,191 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;@23391c70, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 04:50:08,191 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 04:50:08,193 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:08,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-21 04:50:08,197 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:08,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:08,197 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:08,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:08,202 INFO L85 PathProgramCache]: Analyzing trace with hash 365450614, now seen corresponding path program 1 times [2023-12-21 04:50:08,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:08,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516124610] [2023-12-21 04:50:08,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:08,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:50:08,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:08,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516124610] [2023-12-21 04:50:08,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516124610] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 04:50:08,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 04:50:08,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 04:50:08,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174124733] [2023-12-21 04:50:08,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:50:08,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-21 04:50:08,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:08,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-21 04:50:08,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 04:50:08,310 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:08,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:08,323 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2023-12-21 04:50:08,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-21 04:50:08,325 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-21 04:50:08,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:08,333 INFO L225 Difference]: With dead ends: 22 [2023-12-21 04:50:08,333 INFO L226 Difference]: Without dead ends: 10 [2023-12-21 04:50:08,335 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 [2023-12-21 04:50:08,337 INFO L413 NwaCegarLoop]: 13 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, 13 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 [2023-12-21 04:50:08,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:50:08,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-12-21 04:50:08,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-12-21 04:50:08,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:08,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2023-12-21 04:50:08,361 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 9 [2023-12-21 04:50:08,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:08,361 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2023-12-21 04:50:08,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:08,362 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2023-12-21 04:50:08,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-21 04:50:08,362 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:08,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:08,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-21 04:50:08,363 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:08,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:08,363 INFO L85 PathProgramCache]: Analyzing trace with hash 365331450, now seen corresponding path program 1 times [2023-12-21 04:50:08,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:08,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635162304] [2023-12-21 04:50:08,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:08,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:50:08,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:08,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635162304] [2023-12-21 04:50:08,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635162304] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 04:50:08,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 04:50:08,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 04:50:08,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053147487] [2023-12-21 04:50:08,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:50:08,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 04:50:08,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:08,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 04:50:08,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-21 04:50:08,815 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:08,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:08,893 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2023-12-21 04:50:08,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-21 04:50:08,894 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-21 04:50:08,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:08,895 INFO L225 Difference]: With dead ends: 28 [2023-12-21 04:50:08,895 INFO L226 Difference]: Without dead ends: 16 [2023-12-21 04:50:08,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-21 04:50:08,898 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:08,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 19 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:50:08,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-12-21 04:50:08,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-12-21 04:50:08,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:08,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2023-12-21 04:50:08,906 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 9 [2023-12-21 04:50:08,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:08,907 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2023-12-21 04:50:08,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:08,907 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2023-12-21 04:50:08,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-21 04:50:08,908 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:08,909 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:08,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-21 04:50:08,909 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:08,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:08,911 INFO L85 PathProgramCache]: Analyzing trace with hash -694348189, now seen corresponding path program 1 times [2023-12-21 04:50:08,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:08,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097664052] [2023-12-21 04:50:08,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:08,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:08,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:50:08,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:08,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097664052] [2023-12-21 04:50:08,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097664052] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:08,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771619370] [2023-12-21 04:50:08,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:08,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:08,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:08,964 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) [2023-12-21 04:50:08,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 04:50:09,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:09,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-21 04:50:09,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:50:09,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:50:09,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771619370] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:09,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:09,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-12-21 04:50:09,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933474950] [2023-12-21 04:50:09,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:09,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-21 04:50:09,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:09,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-21 04:50:09,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-12-21 04:50:09,067 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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) [2023-12-21 04:50:09,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:09,215 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2023-12-21 04:50:09,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-21 04:50:09,218 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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) Word has length 10 [2023-12-21 04:50:09,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:09,225 INFO L225 Difference]: With dead ends: 64 [2023-12-21 04:50:09,225 INFO L226 Difference]: Without dead ends: 58 [2023-12-21 04:50:09,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-12-21 04:50:09,229 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:09,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 54 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 04:50:09,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-21 04:50:09,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 28. [2023-12-21 04:50:09,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:09,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2023-12-21 04:50:09,241 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 10 [2023-12-21 04:50:09,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:09,241 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2023-12-21 04:50:09,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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) [2023-12-21 04:50:09,242 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2023-12-21 04:50:09,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-21 04:50:09,242 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:09,242 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:09,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-21 04:50:09,449 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 [2023-12-21 04:50:09,450 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:09,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:09,451 INFO L85 PathProgramCache]: Analyzing trace with hash 890333978, now seen corresponding path program 1 times [2023-12-21 04:50:09,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:09,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233856350] [2023-12-21 04:50:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:09,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:09,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 04:50:09,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:09,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233856350] [2023-12-21 04:50:09,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233856350] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 04:50:09,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 04:50:09,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 04:50:09,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809482090] [2023-12-21 04:50:09,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:50:09,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 04:50:09,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:09,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 04:50:09,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 04:50:09,508 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2023-12-21 04:50:09,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:09,527 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-12-21 04:50:09,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 04:50:09,528 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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 [2023-12-21 04:50:09,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:09,528 INFO L225 Difference]: With dead ends: 33 [2023-12-21 04:50:09,529 INFO L226 Difference]: Without dead ends: 23 [2023-12-21 04:50:09,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-21 04:50:09,533 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:09,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 23 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:50:09,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-21 04:50:09,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-21 04:50:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:09,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2023-12-21 04:50:09,541 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 11 [2023-12-21 04:50:09,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:09,541 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2023-12-21 04:50:09,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2023-12-21 04:50:09,541 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2023-12-21 04:50:09,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-21 04:50:09,542 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:09,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:09,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-21 04:50:09,542 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:09,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:09,543 INFO L85 PathProgramCache]: Analyzing trace with hash 490702580, now seen corresponding path program 1 times [2023-12-21 04:50:09,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:09,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28288016] [2023-12-21 04:50:09,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:09,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:09,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:09,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 04:50:09,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:09,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28288016] [2023-12-21 04:50:09,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28288016] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:09,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798418145] [2023-12-21 04:50:09,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:09,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:09,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:09,648 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) [2023-12-21 04:50:09,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 04:50:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:09,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 04:50:09,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:09,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 04:50:09,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:09,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 04:50:09,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798418145] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:09,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:09,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-12-21 04:50:09,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627447299] [2023-12-21 04:50:09,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:09,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 04:50:09,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:09,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 04:50:09,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 04:50:09,743 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:09,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:09,769 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2023-12-21 04:50:09,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 04:50:09,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-21 04:50:09,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:09,772 INFO L225 Difference]: With dead ends: 38 [2023-12-21 04:50:09,772 INFO L226 Difference]: Without dead ends: 34 [2023-12-21 04:50:09,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 04:50:09,772 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:09,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:50:09,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-12-21 04:50:09,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2023-12-21 04:50:09,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 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) [2023-12-21 04:50:09,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 45 transitions. [2023-12-21 04:50:09,784 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 45 transitions. Word has length 12 [2023-12-21 04:50:09,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:09,785 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 45 transitions. [2023-12-21 04:50:09,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:09,785 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 45 transitions. [2023-12-21 04:50:09,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-21 04:50:09,785 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:09,785 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:09,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-21 04:50:09,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:09,990 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:09,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:09,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1966423798, now seen corresponding path program 1 times [2023-12-21 04:50:09,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:09,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584183640] [2023-12-21 04:50:09,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:09,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:50:10,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:10,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584183640] [2023-12-21 04:50:10,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584183640] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:10,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905392736] [2023-12-21 04:50:10,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:10,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:10,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:10,370 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) [2023-12-21 04:50:10,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-21 04:50:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:10,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-21 04:50:10,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:10,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:50:10,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:50:10,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905392736] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:10,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:10,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-12-21 04:50:10,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768387826] [2023-12-21 04:50:10,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:10,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-21 04:50:10,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:10,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-21 04:50:10,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-12-21 04:50:10,715 INFO L87 Difference]: Start difference. First operand 32 states and 45 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:11,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:11,743 INFO L93 Difference]: Finished difference Result 87 states and 115 transitions. [2023-12-21 04:50:11,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-21 04:50:11,744 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 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 13 [2023-12-21 04:50:11,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:11,745 INFO L225 Difference]: With dead ends: 87 [2023-12-21 04:50:11,745 INFO L226 Difference]: Without dead ends: 79 [2023-12-21 04:50:11,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=348, Invalid=1212, Unknown=0, NotChecked=0, Total=1560 [2023-12-21 04:50:11,746 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 83 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:11,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 74 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 04:50:11,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-21 04:50:11,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 37. [2023-12-21 04:50:11,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.5) internal successors, (54), 36 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) [2023-12-21 04:50:11,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 54 transitions. [2023-12-21 04:50:11,758 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 54 transitions. Word has length 13 [2023-12-21 04:50:11,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:11,758 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 54 transitions. [2023-12-21 04:50:11,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:11,758 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 54 transitions. [2023-12-21 04:50:11,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-21 04:50:11,758 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:11,758 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:11,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-21 04:50:11,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:11,964 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:11,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:11,964 INFO L85 PathProgramCache]: Analyzing trace with hash -536062406, now seen corresponding path program 2 times [2023-12-21 04:50:11,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:11,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617389113] [2023-12-21 04:50:11,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:11,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:11,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:12,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:50:12,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:12,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617389113] [2023-12-21 04:50:12,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617389113] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:12,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036745617] [2023-12-21 04:50:12,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:50:12,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:12,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:12,020 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) [2023-12-21 04:50:12,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-21 04:50:12,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:50:12,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:50:12,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-21 04:50:12,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:12,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:50:12,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:12,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:50:12,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036745617] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:12,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:12,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-12-21 04:50:12,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391794246] [2023-12-21 04:50:12,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:12,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-21 04:50:12,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:12,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-21 04:50:12,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-12-21 04:50:12,134 INFO L87 Difference]: Start difference. First operand 37 states and 54 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:12,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:12,708 INFO L93 Difference]: Finished difference Result 167 states and 240 transitions. [2023-12-21 04:50:12,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-21 04:50:12,709 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 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 13 [2023-12-21 04:50:12,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:12,710 INFO L225 Difference]: With dead ends: 167 [2023-12-21 04:50:12,710 INFO L226 Difference]: Without dead ends: 157 [2023-12-21 04:50:12,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2023-12-21 04:50:12,711 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 237 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:12,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 176 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 04:50:12,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-12-21 04:50:12,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 62. [2023-12-21 04:50:12,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.4426229508196722) internal successors, (88), 61 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:12,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 88 transitions. [2023-12-21 04:50:12,737 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 88 transitions. Word has length 13 [2023-12-21 04:50:12,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:12,737 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 88 transitions. [2023-12-21 04:50:12,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:12,737 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 88 transitions. [2023-12-21 04:50:12,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-21 04:50:12,738 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:12,738 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:12,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-21 04:50:12,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:12,943 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:12,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:12,943 INFO L85 PathProgramCache]: Analyzing trace with hash -827930188, now seen corresponding path program 2 times [2023-12-21 04:50:12,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:12,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338972715] [2023-12-21 04:50:12,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:12,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 04:50:12,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:12,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338972715] [2023-12-21 04:50:12,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338972715] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:12,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984332471] [2023-12-21 04:50:12,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:50:12,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:12,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:12,996 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) [2023-12-21 04:50:12,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-21 04:50:13,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:50:13,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:50:13,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-21 04:50:13,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 04:50:13,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 04:50:13,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984332471] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:13,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:13,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-12-21 04:50:13,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681455413] [2023-12-21 04:50:13,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:13,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 04:50:13,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:13,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 04:50:13,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 04:50:13,078 INFO L87 Difference]: Start difference. First operand 62 states and 88 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:13,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:13,108 INFO L93 Difference]: Finished difference Result 74 states and 102 transitions. [2023-12-21 04:50:13,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 04:50:13,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2023-12-21 04:50:13,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:13,110 INFO L225 Difference]: With dead ends: 74 [2023-12-21 04:50:13,110 INFO L226 Difference]: Without dead ends: 65 [2023-12-21 04:50:13,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 04:50:13,111 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:13,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 26 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:50:13,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-12-21 04:50:13,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-12-21 04:50:13,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.421875) internal successors, (91), 64 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:13,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2023-12-21 04:50:13,138 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 14 [2023-12-21 04:50:13,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:13,138 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2023-12-21 04:50:13,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:13,138 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2023-12-21 04:50:13,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-21 04:50:13,141 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:13,141 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:13,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-21 04:50:13,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:13,345 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:13,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:13,346 INFO L85 PathProgramCache]: Analyzing trace with hash 656518644, now seen corresponding path program 2 times [2023-12-21 04:50:13,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:13,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265950092] [2023-12-21 04:50:13,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:13,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:13,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 04:50:13,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:13,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265950092] [2023-12-21 04:50:13,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265950092] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:13,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875074852] [2023-12-21 04:50:13,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:50:13,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:13,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:13,395 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) [2023-12-21 04:50:13,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-21 04:50:13,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:50:13,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:50:13,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-21 04:50:13,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 04:50:13,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 04:50:13,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875074852] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:13,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:13,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 12 [2023-12-21 04:50:13,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571838590] [2023-12-21 04:50:13,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:13,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-21 04:50:13,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:13,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-21 04:50:13,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-12-21 04:50:13,490 INFO L87 Difference]: Start difference. First operand 65 states and 91 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:13,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:13,549 INFO L93 Difference]: Finished difference Result 88 states and 119 transitions. [2023-12-21 04:50:13,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 04:50:13,550 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-21 04:50:13,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:13,550 INFO L225 Difference]: With dead ends: 88 [2023-12-21 04:50:13,550 INFO L226 Difference]: Without dead ends: 70 [2023-12-21 04:50:13,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-12-21 04:50:13,552 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:13,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 62 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:50:13,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-12-21 04:50:13,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2023-12-21 04:50:13,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 56 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:13,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 81 transitions. [2023-12-21 04:50:13,570 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 81 transitions. Word has length 14 [2023-12-21 04:50:13,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:13,570 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 81 transitions. [2023-12-21 04:50:13,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:13,570 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 81 transitions. [2023-12-21 04:50:13,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-21 04:50:13,570 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:13,571 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:13,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-21 04:50:13,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:13,775 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:13,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:13,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1306904410, now seen corresponding path program 3 times [2023-12-21 04:50:13,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:13,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772003646] [2023-12-21 04:50:13,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:13,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 04:50:13,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:13,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772003646] [2023-12-21 04:50:13,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772003646] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:13,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422435007] [2023-12-21 04:50:13,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 04:50:13,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:13,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:13,824 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) [2023-12-21 04:50:13,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-21 04:50:13,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-21 04:50:13,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:50:13,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-21 04:50:13,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:13,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 04:50:13,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:13,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 04:50:13,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422435007] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:13,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:13,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-12-21 04:50:13,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533372826] [2023-12-21 04:50:13,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:13,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-21 04:50:13,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:13,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-21 04:50:13,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-12-21 04:50:13,914 INFO L87 Difference]: Start difference. First operand 57 states and 81 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 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) [2023-12-21 04:50:14,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:14,028 INFO L93 Difference]: Finished difference Result 108 states and 136 transitions. [2023-12-21 04:50:14,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-21 04:50:14,029 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 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 [2023-12-21 04:50:14,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:14,029 INFO L225 Difference]: With dead ends: 108 [2023-12-21 04:50:14,029 INFO L226 Difference]: Without dead ends: 92 [2023-12-21 04:50:14,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-12-21 04:50:14,030 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 54 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:14,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 66 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 04:50:14,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-12-21 04:50:14,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 55. [2023-12-21 04:50:14,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.4259259259259258) internal successors, (77), 54 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:14,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 77 transitions. [2023-12-21 04:50:14,043 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 77 transitions. Word has length 15 [2023-12-21 04:50:14,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:14,043 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 77 transitions. [2023-12-21 04:50:14,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 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) [2023-12-21 04:50:14,044 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 77 transitions. [2023-12-21 04:50:14,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-21 04:50:14,044 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:14,044 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:14,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-21 04:50:14,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:14,255 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:14,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:14,256 INFO L85 PathProgramCache]: Analyzing trace with hash 850517434, now seen corresponding path program 3 times [2023-12-21 04:50:14,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:14,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375133845] [2023-12-21 04:50:14,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:14,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 04:50:14,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:14,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375133845] [2023-12-21 04:50:14,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375133845] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:14,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213895699] [2023-12-21 04:50:14,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 04:50:14,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:14,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:14,315 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) [2023-12-21 04:50:14,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-21 04:50:14,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-21 04:50:14,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:50:14,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-21 04:50:14,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 04:50:14,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 04:50:14,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213895699] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:14,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:14,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2023-12-21 04:50:14,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888547610] [2023-12-21 04:50:14,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:14,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 04:50:14,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:14,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 04:50:14,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-12-21 04:50:14,393 INFO L87 Difference]: Start difference. First operand 55 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:14,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:14,439 INFO L93 Difference]: Finished difference Result 76 states and 107 transitions. [2023-12-21 04:50:14,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 04:50:14,440 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2023-12-21 04:50:14,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:14,440 INFO L225 Difference]: With dead ends: 76 [2023-12-21 04:50:14,440 INFO L226 Difference]: Without dead ends: 72 [2023-12-21 04:50:14,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-12-21 04:50:14,441 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:14,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 58 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:50:14,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-21 04:50:14,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2023-12-21 04:50:14,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.4202898550724639) internal successors, (98), 69 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:14,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2023-12-21 04:50:14,457 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 15 [2023-12-21 04:50:14,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:14,457 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2023-12-21 04:50:14,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:14,457 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2023-12-21 04:50:14,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-21 04:50:14,457 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:14,457 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:14,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-21 04:50:14,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-21 04:50:14,662 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:14,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:14,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1356760826, now seen corresponding path program 4 times [2023-12-21 04:50:14,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:14,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96254620] [2023-12-21 04:50:14,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:14,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:15,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:50:15,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:15,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96254620] [2023-12-21 04:50:15,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96254620] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:15,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694326436] [2023-12-21 04:50:15,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 04:50:15,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:15,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:15,081 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) [2023-12-21 04:50:15,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-21 04:50:15,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 04:50:15,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:50:15,121 WARN L260 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-21 04:50:15,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:15,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:50:15,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:50:16,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694326436] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:16,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:16,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 32 [2023-12-21 04:50:16,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079209648] [2023-12-21 04:50:16,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:16,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-21 04:50:16,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:16,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-21 04:50:16,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2023-12-21 04:50:16,011 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:17,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:17,715 INFO L93 Difference]: Finished difference Result 125 states and 161 transitions. [2023-12-21 04:50:17,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-21 04:50:17,716 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-21 04:50:17,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:17,716 INFO L225 Difference]: With dead ends: 125 [2023-12-21 04:50:17,716 INFO L226 Difference]: Without dead ends: 104 [2023-12-21 04:50:17,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=574, Invalid=2618, Unknown=0, NotChecked=0, Total=3192 [2023-12-21 04:50:17,717 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 146 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:17,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 66 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 04:50:17,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-12-21 04:50:17,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 70. [2023-12-21 04:50:17,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.3623188405797102) internal successors, (94), 69 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:17,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2023-12-21 04:50:17,738 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 17 [2023-12-21 04:50:17,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:17,738 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2023-12-21 04:50:17,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:17,739 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2023-12-21 04:50:17,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-21 04:50:17,739 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:17,739 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:17,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-21 04:50:17,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:17,943 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:17,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:17,943 INFO L85 PathProgramCache]: Analyzing trace with hash -362720518, now seen corresponding path program 4 times [2023-12-21 04:50:17,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:17,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355829384] [2023-12-21 04:50:17,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:17,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:18,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 04:50:18,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:18,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355829384] [2023-12-21 04:50:18,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355829384] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:18,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443433275] [2023-12-21 04:50:18,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 04:50:18,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:18,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:18,006 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) [2023-12-21 04:50:18,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-21 04:50:18,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 04:50:18,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:50:18,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-21 04:50:18,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:18,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 04:50:18,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 04:50:18,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443433275] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:18,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:18,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2023-12-21 04:50:18,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810712031] [2023-12-21 04:50:18,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:18,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-21 04:50:18,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:18,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-21 04:50:18,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-12-21 04:50:18,136 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:18,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:18,291 INFO L93 Difference]: Finished difference Result 105 states and 132 transitions. [2023-12-21 04:50:18,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-21 04:50:18,291 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-21 04:50:18,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:18,293 INFO L225 Difference]: With dead ends: 105 [2023-12-21 04:50:18,293 INFO L226 Difference]: Without dead ends: 85 [2023-12-21 04:50:18,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2023-12-21 04:50:18,294 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 57 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:18,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 71 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 04:50:18,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-21 04:50:18,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2023-12-21 04:50:18,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.3181818181818181) internal successors, (87), 66 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:18,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2023-12-21 04:50:18,336 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 17 [2023-12-21 04:50:18,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:18,336 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2023-12-21 04:50:18,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:18,336 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2023-12-21 04:50:18,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-21 04:50:18,336 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:18,337 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:18,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-21 04:50:18,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-21 04:50:18,541 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:18,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:18,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1786631604, now seen corresponding path program 5 times [2023-12-21 04:50:18,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:18,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481772991] [2023-12-21 04:50:18,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:18,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:18,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 04:50:18,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:18,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481772991] [2023-12-21 04:50:18,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481772991] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:18,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98760907] [2023-12-21 04:50:18,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 04:50:18,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:18,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:18,642 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) [2023-12-21 04:50:18,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-21 04:50:18,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-21 04:50:18,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:50:18,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-21 04:50:18,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 04:50:18,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 04:50:18,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98760907] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:18,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:18,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2023-12-21 04:50:18,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886865853] [2023-12-21 04:50:18,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:18,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-21 04:50:18,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:18,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-21 04:50:18,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-12-21 04:50:18,760 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:18,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:18,828 INFO L93 Difference]: Finished difference Result 91 states and 120 transitions. [2023-12-21 04:50:18,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 04:50:18,828 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-21 04:50:18,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:18,829 INFO L225 Difference]: With dead ends: 91 [2023-12-21 04:50:18,829 INFO L226 Difference]: Without dead ends: 87 [2023-12-21 04:50:18,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-12-21 04:50:18,829 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:18,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 42 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:50:18,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-12-21 04:50:18,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2023-12-21 04:50:18,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.3205128205128205) internal successors, (103), 78 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:18,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2023-12-21 04:50:18,854 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 18 [2023-12-21 04:50:18,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:18,854 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2023-12-21 04:50:18,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:18,854 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2023-12-21 04:50:18,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-21 04:50:18,854 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:18,854 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:18,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-21 04:50:19,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-21 04:50:19,057 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:19,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:19,057 INFO L85 PathProgramCache]: Analyzing trace with hash -810930964, now seen corresponding path program 5 times [2023-12-21 04:50:19,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:19,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492569188] [2023-12-21 04:50:19,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:19,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 04:50:19,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:19,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492569188] [2023-12-21 04:50:19,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492569188] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:19,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116555942] [2023-12-21 04:50:19,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 04:50:19,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:19,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:19,129 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) [2023-12-21 04:50:19,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-21 04:50:19,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-21 04:50:19,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:50:19,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-21 04:50:19,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 04:50:19,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 04:50:19,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116555942] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:19,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:19,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-12-21 04:50:19,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365109955] [2023-12-21 04:50:19,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:19,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-21 04:50:19,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:19,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-21 04:50:19,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-12-21 04:50:19,281 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:19,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:19,479 INFO L93 Difference]: Finished difference Result 140 states and 166 transitions. [2023-12-21 04:50:19,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-21 04:50:19,479 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-21 04:50:19,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:19,480 INFO L225 Difference]: With dead ends: 140 [2023-12-21 04:50:19,480 INFO L226 Difference]: Without dead ends: 118 [2023-12-21 04:50:19,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2023-12-21 04:50:19,482 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:19,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 111 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 04:50:19,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-12-21 04:50:19,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 69. [2023-12-21 04:50:19,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 68 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:19,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 88 transitions. [2023-12-21 04:50:19,507 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 88 transitions. Word has length 19 [2023-12-21 04:50:19,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:19,507 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 88 transitions. [2023-12-21 04:50:19,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:19,507 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 88 transitions. [2023-12-21 04:50:19,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-21 04:50:19,508 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:19,508 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:19,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-21 04:50:19,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-21 04:50:19,712 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:19,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:19,713 INFO L85 PathProgramCache]: Analyzing trace with hash -333836406, now seen corresponding path program 6 times [2023-12-21 04:50:19,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:19,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454258790] [2023-12-21 04:50:19,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:19,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 04:50:19,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:19,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454258790] [2023-12-21 04:50:19,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454258790] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:19,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972733046] [2023-12-21 04:50:19,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 04:50:19,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:19,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:19,999 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) [2023-12-21 04:50:19,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-21 04:50:20,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-12-21 04:50:20,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:50:20,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-21 04:50:20,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:50:20,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:20,610 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 04:50:20,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972733046] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:20,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:20,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 25 [2023-12-21 04:50:20,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857694651] [2023-12-21 04:50:20,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:20,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-21 04:50:20,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:20,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-21 04:50:20,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2023-12-21 04:50:20,611 INFO L87 Difference]: Start difference. First operand 69 states and 88 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:22,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:22,378 INFO L93 Difference]: Finished difference Result 144 states and 170 transitions. [2023-12-21 04:50:22,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-21 04:50:22,378 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-12-21 04:50:22,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:22,379 INFO L225 Difference]: With dead ends: 144 [2023-12-21 04:50:22,379 INFO L226 Difference]: Without dead ends: 138 [2023-12-21 04:50:22,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=374, Invalid=2076, Unknown=0, NotChecked=0, Total=2450 [2023-12-21 04:50:22,380 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 73 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:22,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 168 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 04:50:22,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-12-21 04:50:22,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 95. [2023-12-21 04:50:22,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.297872340425532) internal successors, (122), 94 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:22,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 122 transitions. [2023-12-21 04:50:22,420 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 122 transitions. Word has length 21 [2023-12-21 04:50:22,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:22,421 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 122 transitions. [2023-12-21 04:50:22,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:22,421 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 122 transitions. [2023-12-21 04:50:22,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-21 04:50:22,422 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:22,422 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:22,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-21 04:50:22,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-21 04:50:22,627 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:22,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:22,627 INFO L85 PathProgramCache]: Analyzing trace with hash 90798636, now seen corresponding path program 6 times [2023-12-21 04:50:22,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:22,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804140931] [2023-12-21 04:50:22,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:22,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 04:50:22,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:22,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804140931] [2023-12-21 04:50:22,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804140931] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:22,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111022950] [2023-12-21 04:50:22,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 04:50:22,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:22,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:22,701 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) [2023-12-21 04:50:22,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-21 04:50:22,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-21 04:50:22,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:50:22,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-21 04:50:22,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 04:50:22,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 04:50:22,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111022950] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:22,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:22,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 22 [2023-12-21 04:50:22,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626006587] [2023-12-21 04:50:22,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:22,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-21 04:50:22,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:22,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-21 04:50:22,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2023-12-21 04:50:22,902 INFO L87 Difference]: Start difference. First operand 95 states and 122 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:23,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:23,306 INFO L93 Difference]: Finished difference Result 181 states and 215 transitions. [2023-12-21 04:50:23,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-21 04:50:23,306 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-12-21 04:50:23,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:23,307 INFO L225 Difference]: With dead ends: 181 [2023-12-21 04:50:23,307 INFO L226 Difference]: Without dead ends: 158 [2023-12-21 04:50:23,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=288, Invalid=1044, Unknown=0, NotChecked=0, Total=1332 [2023-12-21 04:50:23,308 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 174 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:23,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 132 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 04:50:23,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-12-21 04:50:23,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 79. [2023-12-21 04:50:23,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:23,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2023-12-21 04:50:23,353 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 21 [2023-12-21 04:50:23,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:23,353 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2023-12-21 04:50:23,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:23,353 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2023-12-21 04:50:23,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-21 04:50:23,353 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:23,354 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:23,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-21 04:50:23,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:23,558 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:23,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:23,558 INFO L85 PathProgramCache]: Analyzing trace with hash -746453126, now seen corresponding path program 7 times [2023-12-21 04:50:23,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:23,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925789293] [2023-12-21 04:50:23,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:23,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-21 04:50:23,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:23,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925789293] [2023-12-21 04:50:23,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925789293] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:23,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247096111] [2023-12-21 04:50:23,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 04:50:23,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:23,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:23,675 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) [2023-12-21 04:50:23,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-21 04:50:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:23,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-21 04:50:23,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-21 04:50:23,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-21 04:50:23,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247096111] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:23,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:23,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 14 [2023-12-21 04:50:23,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696462650] [2023-12-21 04:50:23,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:23,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-21 04:50:23,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:23,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-21 04:50:23,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-12-21 04:50:23,794 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:23,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:23,914 INFO L93 Difference]: Finished difference Result 115 states and 144 transitions. [2023-12-21 04:50:23,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-21 04:50:23,915 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 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 [2023-12-21 04:50:23,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:23,915 INFO L225 Difference]: With dead ends: 115 [2023-12-21 04:50:23,915 INFO L226 Difference]: Without dead ends: 111 [2023-12-21 04:50:23,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-12-21 04:50:23,916 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 56 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:23,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 66 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 04:50:23,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-12-21 04:50:23,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 87. [2023-12-21 04:50:23,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.2674418604651163) internal successors, (109), 86 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2023-12-21 04:50:23,967 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 21 [2023-12-21 04:50:23,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:23,968 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2023-12-21 04:50:23,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:23,968 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2023-12-21 04:50:23,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-21 04:50:23,968 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:23,968 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:23,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-21 04:50:24,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-21 04:50:24,169 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:24,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:24,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1757328588, now seen corresponding path program 7 times [2023-12-21 04:50:24,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:24,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676125743] [2023-12-21 04:50:24,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:24,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 04:50:24,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:24,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676125743] [2023-12-21 04:50:24,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676125743] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:24,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24054986] [2023-12-21 04:50:24,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 04:50:24,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:24,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:24,239 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) [2023-12-21 04:50:24,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-21 04:50:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:24,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-21 04:50:24,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 04:50:24,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:24,361 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 04:50:24,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24054986] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:24,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:24,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2023-12-21 04:50:24,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489057972] [2023-12-21 04:50:24,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:24,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 04:50:24,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:24,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 04:50:24,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-21 04:50:24,363 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2023-12-21 04:50:24,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:24,444 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2023-12-21 04:50:24,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 04:50:24,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 22 [2023-12-21 04:50:24,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:24,448 INFO L225 Difference]: With dead ends: 114 [2023-12-21 04:50:24,448 INFO L226 Difference]: Without dead ends: 86 [2023-12-21 04:50:24,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 11 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-21 04:50:24,448 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:24,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 57 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:50:24,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-21 04:50:24,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2023-12-21 04:50:24,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.25) internal successors, (100), 80 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:24,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2023-12-21 04:50:24,501 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 22 [2023-12-21 04:50:24,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:24,501 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2023-12-21 04:50:24,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2023-12-21 04:50:24,501 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2023-12-21 04:50:24,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-21 04:50:24,501 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:24,501 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:24,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-21 04:50:24,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:24,705 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:24,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:24,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1637447652, now seen corresponding path program 8 times [2023-12-21 04:50:24,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:24,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109031615] [2023-12-21 04:50:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:24,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:24,791 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-21 04:50:24,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:24,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109031615] [2023-12-21 04:50:24,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109031615] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:24,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373426993] [2023-12-21 04:50:24,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:50:24,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:24,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:24,792 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:50:24,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-21 04:50:24,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:50:24,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:50:24,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-21 04:50:24,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-21 04:50:24,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:25,051 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-21 04:50:25,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373426993] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:25,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:25,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 27 [2023-12-21 04:50:25,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704462996] [2023-12-21 04:50:25,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:25,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-21 04:50:25,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:25,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-21 04:50:25,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2023-12-21 04:50:25,052 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:25,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:25,871 INFO L93 Difference]: Finished difference Result 220 states and 258 transitions. [2023-12-21 04:50:25,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-12-21 04:50:25,871 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 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 22 [2023-12-21 04:50:25,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:25,872 INFO L225 Difference]: With dead ends: 220 [2023-12-21 04:50:25,872 INFO L226 Difference]: Without dead ends: 196 [2023-12-21 04:50:25,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=489, Invalid=1863, Unknown=0, NotChecked=0, Total=2352 [2023-12-21 04:50:25,873 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 191 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:25,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 180 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 04:50:25,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-12-21 04:50:25,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 82. [2023-12-21 04:50:25,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 81 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:25,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2023-12-21 04:50:25,922 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 22 [2023-12-21 04:50:25,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:25,922 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2023-12-21 04:50:25,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:25,923 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2023-12-21 04:50:25,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-21 04:50:25,923 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:25,923 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:25,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-21 04:50:26,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:26,123 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:26,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:26,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1682904180, now seen corresponding path program 9 times [2023-12-21 04:50:26,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:26,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445910507] [2023-12-21 04:50:26,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:26,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 04:50:26,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:26,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445910507] [2023-12-21 04:50:26,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445910507] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:26,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724613131] [2023-12-21 04:50:26,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 04:50:26,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:26,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:26,270 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:50:26,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-21 04:50:26,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-21 04:50:26,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:50:26,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-21 04:50:26,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 04:50:26,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 04:50:26,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724613131] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:26,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:26,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 17 [2023-12-21 04:50:26,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320413856] [2023-12-21 04:50:26,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:26,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-21 04:50:26,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:26,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-21 04:50:26,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2023-12-21 04:50:26,427 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:26,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:26,564 INFO L93 Difference]: Finished difference Result 103 states and 133 transitions. [2023-12-21 04:50:26,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-21 04:50:26,564 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 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 24 [2023-12-21 04:50:26,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:26,564 INFO L225 Difference]: With dead ends: 103 [2023-12-21 04:50:26,564 INFO L226 Difference]: Without dead ends: 99 [2023-12-21 04:50:26,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2023-12-21 04:50:26,565 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 31 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:26,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 94 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 04:50:26,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-12-21 04:50:26,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2023-12-21 04:50:26,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.247191011235955) internal successors, (111), 89 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:26,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 111 transitions. [2023-12-21 04:50:26,610 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 111 transitions. Word has length 24 [2023-12-21 04:50:26,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:26,610 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 111 transitions. [2023-12-21 04:50:26,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:26,610 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 111 transitions. [2023-12-21 04:50:26,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-21 04:50:26,611 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:26,611 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:26,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-21 04:50:26,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:26,811 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:26,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:26,812 INFO L85 PathProgramCache]: Analyzing trace with hash -284211179, now seen corresponding path program 1 times [2023-12-21 04:50:26,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:26,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56765529] [2023-12-21 04:50:26,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:26,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:26,921 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 04:50:26,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:26,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56765529] [2023-12-21 04:50:26,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56765529] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:26,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341870823] [2023-12-21 04:50:26,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:26,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:26,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:26,922 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:50:26,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-21 04:50:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:26,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-21 04:50:26,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 04:50:26,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-12-21 04:50:27,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341870823] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:27,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-21 04:50:27,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13, 13] total 17 [2023-12-21 04:50:27,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893075623] [2023-12-21 04:50:27,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:50:27,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 04:50:27,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:27,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 04:50:27,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2023-12-21 04:50:27,030 INFO L87 Difference]: Start difference. First operand 90 states and 111 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:27,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:27,089 INFO L93 Difference]: Finished difference Result 101 states and 121 transitions. [2023-12-21 04:50:27,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 04:50:27,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-21 04:50:27,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:27,090 INFO L225 Difference]: With dead ends: 101 [2023-12-21 04:50:27,090 INFO L226 Difference]: Without dead ends: 90 [2023-12-21 04:50:27,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2023-12-21 04:50:27,091 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:27,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 21 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:50:27,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-12-21 04:50:27,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2023-12-21 04:50:27,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 83 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:27,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2023-12-21 04:50:27,134 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 24 [2023-12-21 04:50:27,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:27,134 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2023-12-21 04:50:27,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:27,134 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2023-12-21 04:50:27,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-21 04:50:27,135 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:27,135 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:27,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-21 04:50:27,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:27,335 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:27,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:27,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1683281414, now seen corresponding path program 8 times [2023-12-21 04:50:27,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:27,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991484514] [2023-12-21 04:50:27,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:27,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 04:50:27,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:27,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991484514] [2023-12-21 04:50:27,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991484514] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:27,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656154306] [2023-12-21 04:50:27,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:50:27,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:27,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:27,671 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:50:27,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-21 04:50:27,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:50:27,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:50:27,753 WARN L260 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 59 conjunts are in the unsatisfiable core [2023-12-21 04:50:27,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:28,226 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:50:28,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-21 04:50:28,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656154306] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:28,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:28,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 12] total 39 [2023-12-21 04:50:28,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194419657] [2023-12-21 04:50:28,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:28,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-21 04:50:28,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:28,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-21 04:50:28,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1331, Unknown=0, NotChecked=0, Total=1560 [2023-12-21 04:50:28,624 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand has 40 states, 40 states have (on average 1.65) internal successors, (66), 39 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:30,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:30,432 INFO L93 Difference]: Finished difference Result 123 states and 146 transitions. [2023-12-21 04:50:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-21 04:50:30,432 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.65) internal successors, (66), 39 states have internal predecessors, (66), 0 states have call successors, (0), 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 [2023-12-21 04:50:30,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:30,433 INFO L225 Difference]: With dead ends: 123 [2023-12-21 04:50:30,433 INFO L226 Difference]: Without dead ends: 94 [2023-12-21 04:50:30,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=491, Invalid=2815, Unknown=0, NotChecked=0, Total=3306 [2023-12-21 04:50:30,434 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 39 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:30,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 57 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 04:50:30,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-12-21 04:50:30,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 68. [2023-12-21 04:50:30,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 67 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:30,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2023-12-21 04:50:30,474 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 25 [2023-12-21 04:50:30,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:30,475 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2023-12-21 04:50:30,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.65) internal successors, (66), 39 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:30,475 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2023-12-21 04:50:30,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-21 04:50:30,475 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:30,475 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:30,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-21 04:50:30,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-21 04:50:30,683 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:30,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:30,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1846988854, now seen corresponding path program 9 times [2023-12-21 04:50:30,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:30,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379886629] [2023-12-21 04:50:30,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:30,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-21 04:50:30,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:30,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379886629] [2023-12-21 04:50:30,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379886629] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:30,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286830379] [2023-12-21 04:50:30,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 04:50:30,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:30,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:30,790 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:50:30,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-21 04:50:30,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-21 04:50:30,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:50:30,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-21 04:50:30,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:30,904 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-21 04:50:30,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:31,028 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-21 04:50:31,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286830379] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:31,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:31,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 24 [2023-12-21 04:50:31,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907327836] [2023-12-21 04:50:31,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:31,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-21 04:50:31,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:31,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-21 04:50:31,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-12-21 04:50:31,030 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:31,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:31,432 INFO L93 Difference]: Finished difference Result 181 states and 209 transitions. [2023-12-21 04:50:31,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-21 04:50:31,433 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-21 04:50:31,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:31,433 INFO L225 Difference]: With dead ends: 181 [2023-12-21 04:50:31,433 INFO L226 Difference]: Without dead ends: 144 [2023-12-21 04:50:31,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2023-12-21 04:50:31,434 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 60 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:31,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 348 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 04:50:31,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-12-21 04:50:31,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 84. [2023-12-21 04:50:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 83 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:31,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2023-12-21 04:50:31,477 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 25 [2023-12-21 04:50:31,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:31,477 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2023-12-21 04:50:31,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:31,478 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2023-12-21 04:50:31,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-21 04:50:31,478 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:31,478 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:31,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-21 04:50:31,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-21 04:50:31,682 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:31,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:31,683 INFO L85 PathProgramCache]: Analyzing trace with hash -213632363, now seen corresponding path program 10 times [2023-12-21 04:50:31,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:31,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046001048] [2023-12-21 04:50:31,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:31,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:31,771 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-21 04:50:31,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:31,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046001048] [2023-12-21 04:50:31,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046001048] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:31,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565893158] [2023-12-21 04:50:31,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 04:50:31,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:31,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:31,773 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:50:31,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-21 04:50:31,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 04:50:31,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:50:31,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-21 04:50:31,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 04:50:31,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 04:50:32,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565893158] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:32,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:32,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-12-21 04:50:32,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959951658] [2023-12-21 04:50:32,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:32,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-21 04:50:32,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:32,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-21 04:50:32,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2023-12-21 04:50:32,031 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:35,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:35,259 INFO L93 Difference]: Finished difference Result 214 states and 261 transitions. [2023-12-21 04:50:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-12-21 04:50:35,259 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2023-12-21 04:50:35,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:35,260 INFO L225 Difference]: With dead ends: 214 [2023-12-21 04:50:35,260 INFO L226 Difference]: Without dead ends: 201 [2023-12-21 04:50:35,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 37 SyntacticMatches, 12 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=833, Invalid=5487, Unknown=0, NotChecked=0, Total=6320 [2023-12-21 04:50:35,262 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 198 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:35,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 164 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 04:50:35,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-12-21 04:50:35,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 116. [2023-12-21 04:50:35,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.2) internal successors, (138), 115 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:35,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 138 transitions. [2023-12-21 04:50:35,326 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 138 transitions. Word has length 26 [2023-12-21 04:50:35,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:35,326 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 138 transitions. [2023-12-21 04:50:35,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:35,326 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 138 transitions. [2023-12-21 04:50:35,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-21 04:50:35,326 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:35,326 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:35,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-21 04:50:35,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:35,531 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:35,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:35,531 INFO L85 PathProgramCache]: Analyzing trace with hash -2022980820, now seen corresponding path program 11 times [2023-12-21 04:50:35,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:35,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999953066] [2023-12-21 04:50:35,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:35,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:35,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:35,647 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 04:50:35,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:35,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999953066] [2023-12-21 04:50:35,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999953066] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:35,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145396086] [2023-12-21 04:50:35,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 04:50:35,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:35,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:35,649 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:50:35,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-21 04:50:35,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-21 04:50:35,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:50:35,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-21 04:50:35,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 04:50:36,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:36,307 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 04:50:36,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145396086] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:36,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:36,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 32 [2023-12-21 04:50:36,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914123210] [2023-12-21 04:50:36,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:36,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-21 04:50:36,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:36,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-21 04:50:36,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2023-12-21 04:50:36,308 INFO L87 Difference]: Start difference. First operand 116 states and 138 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:37,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:37,708 INFO L93 Difference]: Finished difference Result 322 states and 371 transitions. [2023-12-21 04:50:37,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-12-21 04:50:37,708 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-21 04:50:37,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:37,709 INFO L225 Difference]: With dead ends: 322 [2023-12-21 04:50:37,709 INFO L226 Difference]: Without dead ends: 303 [2023-12-21 04:50:37,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=771, Invalid=3011, Unknown=0, NotChecked=0, Total=3782 [2023-12-21 04:50:37,710 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 241 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:37,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 244 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 04:50:37,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-12-21 04:50:37,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 136. [2023-12-21 04:50:37,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.2074074074074075) internal successors, (163), 135 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:37,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 163 transitions. [2023-12-21 04:50:37,797 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 163 transitions. Word has length 27 [2023-12-21 04:50:37,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:37,797 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 163 transitions. [2023-12-21 04:50:37,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:37,797 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 163 transitions. [2023-12-21 04:50:37,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-21 04:50:37,797 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:37,797 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:37,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-21 04:50:38,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:38,002 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:38,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:38,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1981116540, now seen corresponding path program 10 times [2023-12-21 04:50:38,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:38,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636971755] [2023-12-21 04:50:38,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:38,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:38,195 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-21 04:50:38,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:38,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636971755] [2023-12-21 04:50:38,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636971755] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:38,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116656537] [2023-12-21 04:50:38,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 04:50:38,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:38,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:38,196 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:50:38,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-21 04:50:38,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 04:50:38,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:50:38,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-21 04:50:38,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:38,324 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-21 04:50:38,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-21 04:50:38,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116656537] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:38,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:38,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 21 [2023-12-21 04:50:38,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425852878] [2023-12-21 04:50:38,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:38,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-21 04:50:38,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:38,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-21 04:50:38,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2023-12-21 04:50:38,366 INFO L87 Difference]: Start difference. First operand 136 states and 163 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:38,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:38,651 INFO L93 Difference]: Finished difference Result 170 states and 212 transitions. [2023-12-21 04:50:38,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-21 04:50:38,652 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-12-21 04:50:38,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:38,652 INFO L225 Difference]: With dead ends: 170 [2023-12-21 04:50:38,652 INFO L226 Difference]: Without dead ends: 166 [2023-12-21 04:50:38,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2023-12-21 04:50:38,653 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 38 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:38,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 129 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 04:50:38,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-12-21 04:50:38,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 154. [2023-12-21 04:50:38,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.2091503267973855) internal successors, (185), 153 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:38,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2023-12-21 04:50:38,753 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 28 [2023-12-21 04:50:38,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:38,753 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2023-12-21 04:50:38,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:38,753 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2023-12-21 04:50:38,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-21 04:50:38,754 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:38,754 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:38,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-21 04:50:38,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-21 04:50:38,958 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:38,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:38,958 INFO L85 PathProgramCache]: Analyzing trace with hash 94221924, now seen corresponding path program 12 times [2023-12-21 04:50:38,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:38,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234115343] [2023-12-21 04:50:38,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:38,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:38,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:39,076 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-21 04:50:39,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:39,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234115343] [2023-12-21 04:50:39,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234115343] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:39,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519794954] [2023-12-21 04:50:39,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 04:50:39,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:39,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:39,077 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:50:39,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-21 04:50:39,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-21 04:50:39,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:50:39,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-21 04:50:39,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-21 04:50:39,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-21 04:50:39,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519794954] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:39,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:39,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 37 [2023-12-21 04:50:39,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728749838] [2023-12-21 04:50:39,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:39,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-21 04:50:39,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:39,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-21 04:50:39,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2023-12-21 04:50:39,502 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 37 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:43,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:43,074 INFO L93 Difference]: Finished difference Result 499 states and 574 transitions. [2023-12-21 04:50:43,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-12-21 04:50:43,075 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 0 states have call successors, (0), 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 28 [2023-12-21 04:50:43,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:43,076 INFO L225 Difference]: With dead ends: 499 [2023-12-21 04:50:43,076 INFO L226 Difference]: Without dead ends: 449 [2023-12-21 04:50:43,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2473 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1683, Invalid=7437, Unknown=0, NotChecked=0, Total=9120 [2023-12-21 04:50:43,078 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 391 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:43,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 444 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-21 04:50:43,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2023-12-21 04:50:43,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 151. [2023-12-21 04:50:43,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.2266666666666666) internal successors, (184), 150 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:43,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 184 transitions. [2023-12-21 04:50:43,183 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 184 transitions. Word has length 28 [2023-12-21 04:50:43,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:43,183 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 184 transitions. [2023-12-21 04:50:43,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:43,184 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 184 transitions. [2023-12-21 04:50:43,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-21 04:50:43,184 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:43,184 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:43,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-12-21 04:50:43,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-21 04:50:43,384 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:43,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:43,385 INFO L85 PathProgramCache]: Analyzing trace with hash -437682678, now seen corresponding path program 11 times [2023-12-21 04:50:43,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:43,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762237899] [2023-12-21 04:50:43,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:43,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:43,824 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-21 04:50:43,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:43,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762237899] [2023-12-21 04:50:43,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762237899] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:43,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67313417] [2023-12-21 04:50:43,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 04:50:43,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:43,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:43,826 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:50:43,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-21 04:50:44,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-21 04:50:44,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:50:44,128 WARN L260 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 76 conjunts are in the unsatisfiable core [2023-12-21 04:50:44,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:50:45,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:46,890 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:50:46,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67313417] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:46,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:46,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24, 24] total 57 [2023-12-21 04:50:46,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334536287] [2023-12-21 04:50:46,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:46,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-12-21 04:50:46,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:46,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-12-21 04:50:46,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=2707, Unknown=0, NotChecked=0, Total=3306 [2023-12-21 04:50:46,892 INFO L87 Difference]: Start difference. First operand 151 states and 184 transitions. Second operand has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 57 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:55,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:50:55,365 INFO L93 Difference]: Finished difference Result 219 states and 260 transitions. [2023-12-21 04:50:55,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-12-21 04:50:55,365 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 57 states have internal predecessors, (78), 0 states have call successors, (0), 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 29 [2023-12-21 04:50:55,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:50:55,366 INFO L225 Difference]: With dead ends: 219 [2023-12-21 04:50:55,366 INFO L226 Difference]: Without dead ends: 191 [2023-12-21 04:50:55,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2068 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1523, Invalid=6309, Unknown=0, NotChecked=0, Total=7832 [2023-12-21 04:50:55,368 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 169 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-21 04:50:55,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 92 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-21 04:50:55,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-12-21 04:50:55,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 145. [2023-12-21 04:50:55,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.2361111111111112) internal successors, (178), 144 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:55,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 178 transitions. [2023-12-21 04:50:55,471 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 178 transitions. Word has length 29 [2023-12-21 04:50:55,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:50:55,471 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 178 transitions. [2023-12-21 04:50:55,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 57 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:50:55,471 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 178 transitions. [2023-12-21 04:50:55,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-21 04:50:55,474 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:50:55,474 INFO L195 NwaCegarLoop]: trace histogram [11, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:50:55,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-21 04:50:55,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-21 04:50:55,679 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:50:55,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:50:55,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1244670966, now seen corresponding path program 12 times [2023-12-21 04:50:55,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:50:55,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686913410] [2023-12-21 04:50:55,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:50:55,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:50:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:50:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 04:50:55,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:50:55,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686913410] [2023-12-21 04:50:55,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686913410] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:50:55,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806875770] [2023-12-21 04:50:55,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 04:50:55,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:50:55,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:50:55,833 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:50:55,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-21 04:50:55,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-21 04:50:55,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:50:55,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-21 04:50:55,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:50:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 04:50:55,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:50:56,189 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 04:50:56,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806875770] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:50:56,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:50:56,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 29 [2023-12-21 04:50:56,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598706111] [2023-12-21 04:50:56,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:50:56,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-21 04:50:56,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:50:56,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-21 04:50:56,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2023-12-21 04:50:56,191 INFO L87 Difference]: Start difference. First operand 145 states and 178 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:51:22,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:51:22,585 INFO L93 Difference]: Finished difference Result 950 states and 1127 transitions. [2023-12-21 04:51:22,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-12-21 04:51:22,585 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-21 04:51:22,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:51:22,587 INFO L225 Difference]: With dead ends: 950 [2023-12-21 04:51:22,587 INFO L226 Difference]: Without dead ends: 885 [2023-12-21 04:51:22,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1941 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=2159, Invalid=4981, Unknown=0, NotChecked=0, Total=7140 [2023-12-21 04:51:22,588 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 1015 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-21 04:51:22,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1015 Valid, 705 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-21 04:51:22,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2023-12-21 04:51:22,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 244. [2023-12-21 04:51:22,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.2633744855967077) internal successors, (307), 243 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:51:22,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 307 transitions. [2023-12-21 04:51:22,813 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 307 transitions. Word has length 29 [2023-12-21 04:51:22,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:51:22,814 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 307 transitions. [2023-12-21 04:51:22,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:51:22,814 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 307 transitions. [2023-12-21 04:51:22,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-21 04:51:22,814 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:51:22,814 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:51:22,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-21 04:51:23,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:51:23,018 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:51:23,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:51:23,018 INFO L85 PathProgramCache]: Analyzing trace with hash 293290804, now seen corresponding path program 13 times [2023-12-21 04:51:23,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:51:23,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019121878] [2023-12-21 04:51:23,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:51:23,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:51:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:51:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-21 04:51:23,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:51:23,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019121878] [2023-12-21 04:51:23,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019121878] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:51:23,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835095627] [2023-12-21 04:51:23,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 04:51:23,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:51:23,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:51:23,223 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:51:23,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-21 04:51:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:51:23,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-21 04:51:23,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:51:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-21 04:51:23,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:51:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-21 04:51:23,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835095627] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:51:23,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:51:23,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 10] total 23 [2023-12-21 04:51:23,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397487047] [2023-12-21 04:51:23,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:51:23,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-21 04:51:23,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:51:23,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-21 04:51:23,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-12-21 04:51:23,428 INFO L87 Difference]: Start difference. First operand 244 states and 307 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 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) [2023-12-21 04:51:23,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:51:23,817 INFO L93 Difference]: Finished difference Result 263 states and 338 transitions. [2023-12-21 04:51:23,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-21 04:51:23,818 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 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 30 [2023-12-21 04:51:23,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:51:23,818 INFO L225 Difference]: With dead ends: 263 [2023-12-21 04:51:23,818 INFO L226 Difference]: Without dead ends: 259 [2023-12-21 04:51:23,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-12-21 04:51:23,819 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 36 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 04:51:23,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 192 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 04:51:23,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-12-21 04:51:24,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 245. [2023-12-21 04:51:24,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.2622950819672132) internal successors, (308), 244 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:51:24,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 308 transitions. [2023-12-21 04:51:24,051 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 308 transitions. Word has length 30 [2023-12-21 04:51:24,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:51:24,051 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 308 transitions. [2023-12-21 04:51:24,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 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) [2023-12-21 04:51:24,052 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 308 transitions. [2023-12-21 04:51:24,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-21 04:51:24,052 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:51:24,052 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:51:24,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-21 04:51:24,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:51:24,256 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:51:24,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:51:24,257 INFO L85 PathProgramCache]: Analyzing trace with hash 752861868, now seen corresponding path program 13 times [2023-12-21 04:51:24,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:51:24,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016869472] [2023-12-21 04:51:24,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:51:24,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:51:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:51:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-21 04:51:24,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:51:24,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016869472] [2023-12-21 04:51:24,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016869472] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:51:24,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275487265] [2023-12-21 04:51:24,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 04:51:24,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:51:24,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:51:24,377 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:51:24,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-21 04:51:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:51:24,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-21 04:51:24,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:51:24,483 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-21 04:51:24,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:51:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-21 04:51:24,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275487265] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:51:24,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:51:24,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 30 [2023-12-21 04:51:24,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552641062] [2023-12-21 04:51:24,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:51:24,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-21 04:51:24,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:51:24,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-21 04:51:24,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2023-12-21 04:51:24,658 INFO L87 Difference]: Start difference. First operand 245 states and 308 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:51:25,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:51:25,788 INFO L93 Difference]: Finished difference Result 426 states and 491 transitions. [2023-12-21 04:51:25,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-12-21 04:51:25,789 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-12-21 04:51:25,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:51:25,789 INFO L225 Difference]: With dead ends: 426 [2023-12-21 04:51:25,789 INFO L226 Difference]: Without dead ends: 355 [2023-12-21 04:51:25,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=314, Invalid=1942, Unknown=0, NotChecked=0, Total=2256 [2023-12-21 04:51:25,790 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 77 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 04:51:25,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 585 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 04:51:25,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-12-21 04:51:26,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 227. [2023-12-21 04:51:26,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.238938053097345) internal successors, (280), 226 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:51:26,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 280 transitions. [2023-12-21 04:51:26,011 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 280 transitions. Word has length 31 [2023-12-21 04:51:26,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:51:26,011 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 280 transitions. [2023-12-21 04:51:26,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:51:26,011 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 280 transitions. [2023-12-21 04:51:26,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-21 04:51:26,016 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:51:26,016 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:51:26,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-12-21 04:51:26,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:51:26,220 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:51:26,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:51:26,221 INFO L85 PathProgramCache]: Analyzing trace with hash 143682810, now seen corresponding path program 14 times [2023-12-21 04:51:26,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:51:26,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996364124] [2023-12-21 04:51:26,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:51:26,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:51:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:51:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 04:51:26,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:51:26,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996364124] [2023-12-21 04:51:26,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996364124] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:51:26,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978303988] [2023-12-21 04:51:26,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:51:26,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:51:26,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:51:26,746 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:51:26,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-21 04:51:26,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:51:26,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:51:26,902 WARN L260 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 83 conjunts are in the unsatisfiable core [2023-12-21 04:51:26,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:51:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:51:27,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:51:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-21 04:51:28,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978303988] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:51:28,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:51:28,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28, 16] total 55 [2023-12-21 04:51:28,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240860125] [2023-12-21 04:51:28,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:51:28,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-12-21 04:51:28,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:51:28,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-12-21 04:51:28,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=2687, Unknown=0, NotChecked=0, Total=3080 [2023-12-21 04:51:28,462 INFO L87 Difference]: Start difference. First operand 227 states and 280 transitions. Second operand has 56 states, 56 states have (on average 1.5357142857142858) internal successors, (86), 55 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:51:36,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:51:36,067 INFO L93 Difference]: Finished difference Result 395 states and 456 transitions. [2023-12-21 04:51:36,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-12-21 04:51:36,067 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.5357142857142858) internal successors, (86), 55 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-12-21 04:51:36,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:51:36,068 INFO L225 Difference]: With dead ends: 395 [2023-12-21 04:51:36,068 INFO L226 Difference]: Without dead ends: 364 [2023-12-21 04:51:36,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1977 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=936, Invalid=7074, Unknown=0, NotChecked=0, Total=8010 [2023-12-21 04:51:36,069 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 67 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:51:36,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 155 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1356 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-21 04:51:36,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2023-12-21 04:51:36,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 225. [2023-12-21 04:51:36,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.2410714285714286) internal successors, (278), 224 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:51:36,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 278 transitions. [2023-12-21 04:51:36,305 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 278 transitions. Word has length 33 [2023-12-21 04:51:36,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:51:36,305 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 278 transitions. [2023-12-21 04:51:36,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.5357142857142858) internal successors, (86), 55 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:51:36,305 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 278 transitions. [2023-12-21 04:51:36,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-21 04:51:36,306 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:51:36,306 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:51:36,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-12-21 04:51:36,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-12-21 04:51:36,509 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:51:36,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:51:36,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1168911404, now seen corresponding path program 14 times [2023-12-21 04:51:36,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:51:36,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075681303] [2023-12-21 04:51:36,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:51:36,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:51:36,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:51:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-21 04:51:36,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:51:36,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075681303] [2023-12-21 04:51:36,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075681303] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:51:36,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446157269] [2023-12-21 04:51:36,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:51:36,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:51:36,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:51:36,674 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:51:36,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-21 04:51:36,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:51:36,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:51:36,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-21 04:51:36,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:51:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-21 04:51:36,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:51:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-21 04:51:37,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446157269] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:51:37,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:51:37,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 42 [2023-12-21 04:51:37,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932588744] [2023-12-21 04:51:37,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:51:37,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-21 04:51:37,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:51:37,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-21 04:51:37,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2023-12-21 04:51:37,179 INFO L87 Difference]: Start difference. First operand 225 states and 278 transitions. Second operand has 42 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:51:42,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:51:42,287 INFO L93 Difference]: Finished difference Result 568 states and 642 transitions. [2023-12-21 04:51:42,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-12-21 04:51:42,288 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-12-21 04:51:42,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:51:42,289 INFO L225 Difference]: With dead ends: 568 [2023-12-21 04:51:42,289 INFO L226 Difference]: Without dead ends: 540 [2023-12-21 04:51:42,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2002 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1647, Invalid=6543, Unknown=0, NotChecked=0, Total=8190 [2023-12-21 04:51:42,290 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 366 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:51:42,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 308 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-21 04:51:42,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2023-12-21 04:51:42,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 242. [2023-12-21 04:51:42,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.2323651452282158) internal successors, (297), 241 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:51:42,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 297 transitions. [2023-12-21 04:51:42,549 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 297 transitions. Word has length 33 [2023-12-21 04:51:42,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:51:42,549 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 297 transitions. [2023-12-21 04:51:42,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:51:42,549 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 297 transitions. [2023-12-21 04:51:42,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-21 04:51:42,549 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:51:42,549 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:51:42,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-12-21 04:51:42,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:51:42,754 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:51:42,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:51:42,754 INFO L85 PathProgramCache]: Analyzing trace with hash 590400250, now seen corresponding path program 15 times [2023-12-21 04:51:42,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:51:42,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595484696] [2023-12-21 04:51:42,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:51:42,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:51:42,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:51:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-21 04:51:43,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:51:43,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595484696] [2023-12-21 04:51:43,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595484696] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:51:43,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787771987] [2023-12-21 04:51:43,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 04:51:43,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:51:43,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:51:43,038 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:51:43,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-21 04:51:43,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-21 04:51:43,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:51:43,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-21 04:51:43,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:51:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-21 04:51:43,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:51:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-21 04:51:43,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787771987] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:51:43,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:51:43,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 26 [2023-12-21 04:51:43,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329579250] [2023-12-21 04:51:43,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:51:43,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-21 04:51:43,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:51:43,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-21 04:51:43,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2023-12-21 04:51:43,333 INFO L87 Difference]: Start difference. First operand 242 states and 297 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:51:43,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:51:43,841 INFO L93 Difference]: Finished difference Result 300 states and 376 transitions. [2023-12-21 04:51:43,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-21 04:51:43,841 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-12-21 04:51:43,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:51:43,842 INFO L225 Difference]: With dead ends: 300 [2023-12-21 04:51:43,842 INFO L226 Difference]: Without dead ends: 296 [2023-12-21 04:51:43,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2023-12-21 04:51:43,842 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 04:51:43,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 232 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 04:51:43,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-12-21 04:51:44,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 269. [2023-12-21 04:51:44,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.2313432835820894) internal successors, (330), 268 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:51:44,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 330 transitions. [2023-12-21 04:51:44,130 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 330 transitions. Word has length 33 [2023-12-21 04:51:44,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:51:44,130 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 330 transitions. [2023-12-21 04:51:44,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:51:44,131 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 330 transitions. [2023-12-21 04:51:44,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-21 04:51:44,131 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:51:44,131 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:51:44,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-12-21 04:51:44,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:51:44,332 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:51:44,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:51:44,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2128079644, now seen corresponding path program 16 times [2023-12-21 04:51:44,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:51:44,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742243104] [2023-12-21 04:51:44,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:51:44,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:51:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:51:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-21 04:51:44,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:51:44,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742243104] [2023-12-21 04:51:44,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742243104] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:51:44,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002826337] [2023-12-21 04:51:44,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 04:51:44,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:51:44,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:51:44,522 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:51:44,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-21 04:51:44,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 04:51:44,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:51:44,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-21 04:51:44,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:51:44,722 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-21 04:51:44,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:51:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-21 04:51:45,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002826337] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:51:45,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:51:45,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 20] total 47 [2023-12-21 04:51:45,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850408264] [2023-12-21 04:51:45,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:51:45,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-21 04:51:45,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:51:45,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-21 04:51:45,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=1810, Unknown=0, NotChecked=0, Total=2162 [2023-12-21 04:51:45,142 INFO L87 Difference]: Start difference. First operand 269 states and 330 transitions. Second operand has 47 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:51:56,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:51:56,183 INFO L93 Difference]: Finished difference Result 825 states and 923 transitions. [2023-12-21 04:51:56,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2023-12-21 04:51:56,184 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-21 04:51:56,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:51:56,185 INFO L225 Difference]: With dead ends: 825 [2023-12-21 04:51:56,185 INFO L226 Difference]: Without dead ends: 770 [2023-12-21 04:51:56,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5293 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=3358, Invalid=14732, Unknown=0, NotChecked=0, Total=18090 [2023-12-21 04:51:56,187 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 767 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-21 04:51:56,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 514 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 1209 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-21 04:51:56,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2023-12-21 04:51:56,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 291. [2023-12-21 04:51:56,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.217241379310345) internal successors, (353), 290 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:51:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 353 transitions. [2023-12-21 04:51:56,534 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 353 transitions. Word has length 34 [2023-12-21 04:51:56,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:51:56,534 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 353 transitions. [2023-12-21 04:51:56,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:51:56,534 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 353 transitions. [2023-12-21 04:51:56,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-21 04:51:56,534 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:51:56,534 INFO L195 NwaCegarLoop]: trace histogram [14, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:51:56,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-12-21 04:51:56,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-21 04:51:56,735 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:51:56,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:51:56,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1511023718, now seen corresponding path program 15 times [2023-12-21 04:51:56,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:51:56,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801153068] [2023-12-21 04:51:56,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:51:56,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:51:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:51:56,938 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-21 04:51:56,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:51:56,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801153068] [2023-12-21 04:51:56,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801153068] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:51:56,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144234770] [2023-12-21 04:51:56,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 04:51:56,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:51:56,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:51:56,940 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:51:56,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-21 04:51:57,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-21 04:51:57,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:51:57,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-21 04:51:57,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:51:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-21 04:51:57,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:51:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-21 04:51:58,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144234770] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:51:58,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:51:58,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 16] total 36 [2023-12-21 04:51:58,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953335973] [2023-12-21 04:51:58,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:51:58,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-21 04:51:58,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:51:58,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-21 04:51:58,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1037, Unknown=0, NotChecked=0, Total=1332 [2023-12-21 04:51:58,003 INFO L87 Difference]: Start difference. First operand 291 states and 353 transitions. Second operand has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 36 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:52:10,689 WARN L293 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 04:53:54,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:53:54,259 INFO L93 Difference]: Finished difference Result 1280 states and 1499 transitions. [2023-12-21 04:53:54,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-12-21 04:53:54,260 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 36 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-12-21 04:53:54,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:53:54,262 INFO L225 Difference]: With dead ends: 1280 [2023-12-21 04:53:54,262 INFO L226 Difference]: Without dead ends: 1184 [2023-12-21 04:53:54,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4344 ImplicationChecksByTransitivity, 111.9s TimeCoverageRelationStatistics Valid=4196, Invalid=9845, Unknown=1, NotChecked=0, Total=14042 [2023-12-21 04:53:54,264 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 1493 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 2124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-12-21 04:53:54,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1493 Valid, 1155 Invalid, 2124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-12-21 04:53:54,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2023-12-21 04:53:54,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 332. [2023-12-21 04:53:54,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.241691842900302) internal successors, (411), 331 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:53:54,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 411 transitions. [2023-12-21 04:53:54,702 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 411 transitions. Word has length 35 [2023-12-21 04:53:54,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:53:54,702 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 411 transitions. [2023-12-21 04:53:54,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 36 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:53:54,702 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 411 transitions. [2023-12-21 04:53:54,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-21 04:53:54,703 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:53:54,703 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:53:54,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-12-21 04:53:54,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-12-21 04:53:54,908 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:53:54,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:53:54,908 INFO L85 PathProgramCache]: Analyzing trace with hash 634020340, now seen corresponding path program 17 times [2023-12-21 04:53:54,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:53:54,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518435869] [2023-12-21 04:53:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:53:54,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:53:54,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:53:55,219 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-21 04:53:55,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:53:55,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518435869] [2023-12-21 04:53:55,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518435869] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:53:55,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601128930] [2023-12-21 04:53:55,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 04:53:55,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:53:55,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:53:55,221 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:53:55,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-21 04:53:56,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-21 04:53:56,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:53:56,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-21 04:53:56,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:53:56,363 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-21 04:53:56,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:53:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-21 04:53:56,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601128930] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:53:56,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:53:56,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 12] total 39 [2023-12-21 04:53:56,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140059391] [2023-12-21 04:53:56,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:53:56,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-21 04:53:56,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:53:56,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-21 04:53:56,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1038, Unknown=0, NotChecked=0, Total=1482 [2023-12-21 04:53:56,488 INFO L87 Difference]: Start difference. First operand 332 states and 411 transitions. Second operand has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:16,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:55:16,248 INFO L93 Difference]: Finished difference Result 762 states and 1002 transitions. [2023-12-21 04:55:16,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-12-21 04:55:16,248 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-12-21 04:55:16,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:55:16,250 INFO L225 Difference]: With dead ends: 762 [2023-12-21 04:55:16,250 INFO L226 Difference]: Without dead ends: 757 [2023-12-21 04:55:16,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 76.4s TimeCoverageRelationStatistics Valid=1919, Invalid=5052, Unknown=1, NotChecked=0, Total=6972 [2023-12-21 04:55:16,251 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 270 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:55:16,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 307 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-12-21 04:55:16,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2023-12-21 04:55:16,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 466. [2023-12-21 04:55:16,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 1.3419354838709678) internal successors, (624), 465 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:16,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 624 transitions. [2023-12-21 04:55:16,850 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 624 transitions. Word has length 36 [2023-12-21 04:55:16,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:55:16,850 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 624 transitions. [2023-12-21 04:55:16,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:16,850 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 624 transitions. [2023-12-21 04:55:16,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-21 04:55:16,851 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:55:16,851 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:55:16,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-12-21 04:55:17,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-12-21 04:55:17,053 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:55:17,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:55:17,053 INFO L85 PathProgramCache]: Analyzing trace with hash -587920246, now seen corresponding path program 16 times [2023-12-21 04:55:17,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:55:17,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853441488] [2023-12-21 04:55:17,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:55:17,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:55:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:55:17,635 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-21 04:55:17,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:55:17,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853441488] [2023-12-21 04:55:17,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853441488] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:55:17,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152495689] [2023-12-21 04:55:17,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 04:55:17,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:55:17,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:55:17,636 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:55:17,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-21 04:55:17,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 04:55:17,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:55:17,837 WARN L260 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 96 conjunts are in the unsatisfiable core [2023-12-21 04:55:17,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:55:19,719 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:55:19,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:55:21,029 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-21 04:55:21,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152495689] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:55:21,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:55:21,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 32, 18] total 61 [2023-12-21 04:55:21,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726930287] [2023-12-21 04:55:21,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:55:21,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-12-21 04:55:21,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:55:21,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-12-21 04:55:21,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=3316, Unknown=0, NotChecked=0, Total=3782 [2023-12-21 04:55:21,031 INFO L87 Difference]: Start difference. First operand 466 states and 624 transitions. Second operand has 62 states, 62 states have (on average 1.5) internal successors, (93), 61 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:38,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:55:38,169 INFO L93 Difference]: Finished difference Result 845 states and 1017 transitions. [2023-12-21 04:55:38,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-12-21 04:55:38,169 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.5) internal successors, (93), 61 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-12-21 04:55:38,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:55:38,171 INFO L225 Difference]: With dead ends: 845 [2023-12-21 04:55:38,171 INFO L226 Difference]: Without dead ends: 808 [2023-12-21 04:55:38,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=1078, Invalid=8042, Unknown=0, NotChecked=0, Total=9120 [2023-12-21 04:55:38,172 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 81 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-21 04:55:38,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 88 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-21 04:55:38,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2023-12-21 04:55:38,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 463. [2023-12-21 04:55:38,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 1.341991341991342) internal successors, (620), 462 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:38,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 620 transitions. [2023-12-21 04:55:38,768 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 620 transitions. Word has length 37 [2023-12-21 04:55:38,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:55:38,769 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 620 transitions. [2023-12-21 04:55:38,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.5) internal successors, (93), 61 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:38,769 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 620 transitions. [2023-12-21 04:55:38,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-21 04:55:38,769 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:55:38,769 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:55:38,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-12-21 04:55:38,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-21 04:55:38,970 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:55:38,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:55:38,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1103212170, now seen corresponding path program 17 times [2023-12-21 04:55:38,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:55:38,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987848387] [2023-12-21 04:55:38,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:55:38,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:55:38,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:55:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-21 04:55:39,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:55:39,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987848387] [2023-12-21 04:55:39,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987848387] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:55:39,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577558841] [2023-12-21 04:55:39,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 04:55:39,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:55:39,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:55:39,133 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:55:39,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-21 04:55:40,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-21 04:55:40,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:55:40,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-21 04:55:40,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:55:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-21 04:55:40,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:55:40,975 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-21 04:55:40,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577558841] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:55:40,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:55:40,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 14] total 36 [2023-12-21 04:55:40,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672704772] [2023-12-21 04:55:40,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:55:40,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-21 04:55:40,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:55:40,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-21 04:55:40,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2023-12-21 04:55:40,977 INFO L87 Difference]: Start difference. First operand 463 states and 620 transitions. Second operand has 36 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:43,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:55:43,401 INFO L93 Difference]: Finished difference Result 756 states and 913 transitions. [2023-12-21 04:55:43,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-12-21 04:55:43,402 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-12-21 04:55:43,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:55:43,404 INFO L225 Difference]: With dead ends: 756 [2023-12-21 04:55:43,404 INFO L226 Difference]: Without dead ends: 643 [2023-12-21 04:55:43,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=434, Invalid=2988, Unknown=0, NotChecked=0, Total=3422 [2023-12-21 04:55:43,405 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 91 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 04:55:43,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 813 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 04:55:43,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2023-12-21 04:55:43,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 438. [2023-12-21 04:55:43,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 1.3295194508009154) internal successors, (581), 437 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:43,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 581 transitions. [2023-12-21 04:55:43,970 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 581 transitions. Word has length 37 [2023-12-21 04:55:43,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:55:43,971 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 581 transitions. [2023-12-21 04:55:43,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:43,971 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 581 transitions. [2023-12-21 04:55:43,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-21 04:55:43,971 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:55:43,971 INFO L195 NwaCegarLoop]: trace histogram [16, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:55:43,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-12-21 04:55:44,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-12-21 04:55:44,173 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:55:44,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:55:44,173 INFO L85 PathProgramCache]: Analyzing trace with hash -345942957, now seen corresponding path program 18 times [2023-12-21 04:55:44,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:55:44,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650802810] [2023-12-21 04:55:44,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:55:44,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:55:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:55:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-21 04:55:44,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:55:44,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650802810] [2023-12-21 04:55:44,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650802810] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:55:44,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126856434] [2023-12-21 04:55:44,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 04:55:44,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:55:44,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:55:44,435 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:55:44,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-12-21 04:55:45,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-12-21 04:55:45,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:55:45,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-21 04:55:45,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:55:45,439 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-21 04:55:45,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:55:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-21 04:55:46,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126856434] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:55:46,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:55:46,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-12-21 04:55:46,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292395924] [2023-12-21 04:55:46,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:55:46,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-21 04:55:46,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:55:46,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-21 04:55:46,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=1926, Unknown=0, NotChecked=0, Total=2352 [2023-12-21 04:55:46,050 INFO L87 Difference]: Start difference. First operand 438 states and 581 transitions. Second operand has 49 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:14,132 WARN L293 SmtUtils]: Spent 9.33s on a formula simplification. DAG size of input: 70 DAG size of output: 69 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 04:56:25,550 WARN L293 SmtUtils]: Spent 5.05s on a formula simplification. DAG size of input: 66 DAG size of output: 65 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 04:57:38,953 WARN L293 SmtUtils]: Spent 43.60s on a formula simplification. DAG size of input: 88 DAG size of output: 87 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 04:58:00,100 WARN L293 SmtUtils]: Spent 8.45s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 04:58:45,314 WARN L293 SmtUtils]: Spent 28.15s on a formula simplification. DAG size of input: 85 DAG size of output: 84 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 04:58:49,390 WARN L854 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296)) (< 0 (mod (+ 4294967292 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967293) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967293) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967295) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296)) (< 0 (mod (+ 4294967294 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967294) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296)) (< 0 (mod (+ 4294967291 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ 4294967295 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967292) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967291) 4294967296))) is different from false [2023-12-21 04:59:07,529 WARN L293 SmtUtils]: Spent 7.13s on a formula simplification. DAG size of input: 58 DAG size of output: 57 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 05:00:08,413 WARN L293 SmtUtils]: Spent 37.61s on a formula simplification. DAG size of input: 82 DAG size of output: 81 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 05:00:55,795 WARN L293 SmtUtils]: Spent 30.76s on a formula simplification. DAG size of input: 80 DAG size of output: 79 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 05:01:52,983 WARN L293 SmtUtils]: Spent 28.98s on a formula simplification. DAG size of input: 79 DAG size of output: 78 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 05:02:26,319 WARN L293 SmtUtils]: Spent 19.68s on a formula simplification. DAG size of input: 77 DAG size of output: 76 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 05:03:06,081 WARN L293 SmtUtils]: Spent 29.21s on a formula simplification. DAG size of input: 76 DAG size of output: 75 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 05:03:47,948 WARN L293 SmtUtils]: Spent 18.66s on a formula simplification. DAG size of input: 76 DAG size of output: 75 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 05:04:10,667 WARN L293 SmtUtils]: Spent 11.29s on a formula simplification. DAG size of input: 74 DAG size of output: 73 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 05:04:29,803 WARN L293 SmtUtils]: Spent 12.32s on a formula simplification. DAG size of input: 73 DAG size of output: 72 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2023-12-21 05:04:45,564 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 [2023-12-21 05:04:45,579 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-21 05:04:46,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-12-21 05:04:46,766 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2023-12-21 05:04:46,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-12-21 05:04:46,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 137 [2023-12-21 05:04:46,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5470 ImplicationChecksByTransitivity, 522.4s TimeCoverageRelationStatistics Valid=4128, Invalid=17623, Unknown=9, NotChecked=292, Total=22052 [2023-12-21 05:04:46,778 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 901 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-21 05:04:46,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [901 Valid, 305 Invalid, 1574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1334 Invalid, 0 Unknown, 43 Unchecked, 1.8s Time] [2023-12-21 05:04:46,779 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 05:04:46,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-12-21 05:04:46,780 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (438states) and FLOYD_HOARE automaton (currently 119 states, 49 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. [2023-12-21 05:04:46,782 INFO L445 BasicCegarLoop]: Path program histogram: [18, 17, 2, 1, 1, 1, 1] [2023-12-21 05:04:46,784 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 05:04:46,785 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 05:04:46 BoogieIcfgContainer [2023-12-21 05:04:46,785 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 05:04:46,785 INFO L158 Benchmark]: Toolchain (without parser) took 879089.07ms. Allocated memory was 182.5MB in the beginning and 362.8MB in the end (delta: 180.4MB). Free memory was 137.4MB in the beginning and 207.4MB in the end (delta: -70.0MB). Peak memory consumption was 111.4MB. Max. memory is 8.0GB. [2023-12-21 05:04:46,785 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 182.5MB. Free memory is still 140.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 05:04:46,785 INFO L158 Benchmark]: CACSL2BoogieTranslator took 169.02ms. Allocated memory is still 182.5MB. Free memory was 137.4MB in the beginning and 126.4MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-21 05:04:46,785 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.88ms. Allocated memory is still 182.5MB. Free memory was 126.4MB in the beginning and 124.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 05:04:46,786 INFO L158 Benchmark]: Boogie Preprocessor took 31.62ms. Allocated memory is still 182.5MB. Free memory was 124.8MB in the beginning and 123.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-21 05:04:46,786 INFO L158 Benchmark]: RCFGBuilder took 210.96ms. Allocated memory is still 182.5MB. Free memory was 123.2MB in the beginning and 112.2MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-21 05:04:46,786 INFO L158 Benchmark]: TraceAbstraction took 878641.47ms. Allocated memory was 182.5MB in the beginning and 362.8MB in the end (delta: 180.4MB). Free memory was 111.2MB in the beginning and 207.4MB in the end (delta: -96.2MB). Peak memory consumption was 85.2MB. Max. memory is 8.0GB. [2023-12-21 05:04:46,786 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 182.5MB. Free memory is still 140.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 169.02ms. Allocated memory is still 182.5MB. Free memory was 137.4MB in the beginning and 126.4MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 30.88ms. Allocated memory is still 182.5MB. Free memory was 126.4MB in the beginning and 124.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.62ms. Allocated memory is still 182.5MB. Free memory was 124.8MB in the beginning and 123.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 210.96ms. Allocated memory is still 182.5MB. Free memory was 123.2MB in the beginning and 112.2MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 878641.47ms. Allocated memory was 182.5MB in the beginning and 362.8MB in the end (delta: 180.4MB). Free memory was 111.2MB in the beginning and 207.4MB in the end (delta: -96.2MB). Peak memory consumption was 85.2MB. 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 (438states) and FLOYD_HOARE automaton (currently 119 states, 49 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 878.6s, OverallIterations: 41, TraceHistogramMax: 16, PathProgramHistogramMax: 18, EmptinessCheckTime: 0.0s, AutomataDifference: 835.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7669 SdHoareTripleChecker+Valid, 22.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7669 mSDsluCounter, 8440 SdHoareTripleChecker+Invalid, 21.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 43 IncrementalHoareTripleChecker+Unchecked, 7734 mSDsCounter, 3917 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18455 IncrementalHoareTripleChecker+Invalid, 22415 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3917 mSolverCounterUnsat, 706 mSDtfsCounter, 18455 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3211 GetRequests, 1337 SyntacticMatches, 66 SemanticMatches, 1807 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 38213 ImplicationChecksByTransitivity, 801.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=466occurred in iteration=38, InterpolantAutomatonStates: 1458, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.1s AutomataMinimizationTime, 40 MinimizatonAttempts, 4723 StatesRemovedByMinimization, 36 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 5.7s SatisfiabilityAnalysisTime, 23.4s InterpolantComputationTime, 1885 NumberOfCodeBlocks, 1885 NumberOfCodeBlocksAsserted, 155 NumberOfCheckSat, 2696 ConstructedInterpolants, 0 QuantifiedInterpolants, 20302 SizeOfPredicates, 58 NumberOfNonLiveVariables, 4374 ConjunctsInSsa, 1239 ConjunctsInUnsatCore, 117 InterpolantComputations, 4 PerfectInterpolantSequences, 2471/6374 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