/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/loop-invgen/fragtest_simple.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 22:01:22,283 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 22:01:22,352 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 22:01:22,357 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 22:01:22,357 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 22:01:22,378 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 22:01:22,378 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 22:01:22,379 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 22:01:22,379 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 22:01:22,382 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 22:01:22,382 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 22:01:22,382 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 22:01:22,382 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 22:01:22,383 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 22:01:22,383 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 22:01:22,384 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 22:01:22,384 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 22:01:22,384 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 22:01:22,384 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 22:01:22,385 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 22:01:22,385 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 22:01:22,388 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 22:01:22,388 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 22:01:22,388 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 22:01:22,388 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 22:01:22,388 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 22:01:22,389 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 22:01:22,389 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 22:01:22,389 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 22:01:22,389 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 22:01:22,390 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 22:01:22,390 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 22:01:22,390 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 22:01:22,390 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 22:01:22,390 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 22:01:22,390 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 22:01:22,391 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 22:01:22,391 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 22:01:22,391 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 22:01:22,391 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 22:01:22,391 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 22:01:22,391 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 22:01:22,392 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 22:01:22,392 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 22:01:22,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 22:01:22,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 22:01:22,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 22:01:22,587 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 22:01:22,587 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 22:01:22,587 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/fragtest_simple.i [2023-12-15 22:01:23,531 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 22:01:23,723 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 22:01:23,723 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/fragtest_simple.i [2023-12-15 22:01:23,728 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e077cf5ac/4e329b9274b54cc4bd7ffff1c0461866/FLAGe2fa3f4bd [2023-12-15 22:01:23,738 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e077cf5ac/4e329b9274b54cc4bd7ffff1c0461866 [2023-12-15 22:01:23,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 22:01:23,740 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 22:01:23,741 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 22:01:23,741 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 22:01:23,744 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 22:01:23,745 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:01:23" (1/1) ... [2023-12-15 22:01:23,745 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@175aaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:01:23, skipping insertion in model container [2023-12-15 22:01:23,745 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:01:23" (1/1) ... [2023-12-15 22:01:23,759 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 22:01:23,875 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/fragtest_simple.i[893,906] [2023-12-15 22:01:23,886 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 22:01:23,893 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 22:01:23,901 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/fragtest_simple.i[893,906] [2023-12-15 22:01:23,905 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 22:01:23,917 INFO L206 MainTranslator]: Completed translation [2023-12-15 22:01:23,917 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:01:23 WrapperNode [2023-12-15 22:01:23,917 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 22:01:23,918 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 22:01:23,918 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 22:01:23,918 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 22:01:23,923 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:01:23" (1/1) ... [2023-12-15 22:01:23,927 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:01:23" (1/1) ... [2023-12-15 22:01:23,938 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2023-12-15 22:01:23,938 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 22:01:23,939 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 22:01:23,939 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 22:01:23,939 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 22:01:23,945 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:01:23" (1/1) ... [2023-12-15 22:01:23,945 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:01:23" (1/1) ... [2023-12-15 22:01:23,946 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:01:23" (1/1) ... [2023-12-15 22:01:23,953 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-15 22:01:23,953 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:01:23" (1/1) ... [2023-12-15 22:01:23,954 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:01:23" (1/1) ... [2023-12-15 22:01:23,955 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:01:23" (1/1) ... [2023-12-15 22:01:23,957 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:01:23" (1/1) ... [2023-12-15 22:01:23,958 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:01:23" (1/1) ... [2023-12-15 22:01:23,958 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:01:23" (1/1) ... [2023-12-15 22:01:23,959 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 22:01:23,960 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 22:01:23,960 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 22:01:23,960 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 22:01:23,960 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:01:23" (1/1) ... [2023-12-15 22:01:23,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 22:01:23,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:23,988 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-15 22:01:24,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-15 22:01:24,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 22:01:24,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 22:01:24,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 22:01:24,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 22:01:24,054 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 22:01:24,055 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 22:01:24,145 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 22:01:24,160 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 22:01:24,160 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-15 22:01:24,161 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:01:24 BoogieIcfgContainer [2023-12-15 22:01:24,161 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 22:01:24,162 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 22:01:24,162 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 22:01:24,164 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 22:01:24,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:01:23" (1/3) ... [2023-12-15 22:01:24,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76d268e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:01:24, skipping insertion in model container [2023-12-15 22:01:24,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:01:23" (2/3) ... [2023-12-15 22:01:24,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76d268e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:01:24, skipping insertion in model container [2023-12-15 22:01:24,166 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:01:24" (3/3) ... [2023-12-15 22:01:24,166 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i [2023-12-15 22:01:24,178 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 22:01:24,179 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 22:01:24,214 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 22:01:24,218 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1272f24c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 22:01:24,219 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 22:01:24,229 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:24,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-15 22:01:24,234 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:24,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:24,235 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:24,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:24,240 INFO L85 PathProgramCache]: Analyzing trace with hash 217789248, now seen corresponding path program 1 times [2023-12-15 22:01:24,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:24,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684087026] [2023-12-15 22:01:24,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:24,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:24,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:24,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684087026] [2023-12-15 22:01:24,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684087026] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 22:01:24,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 22:01:24,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 22:01:24,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356662995] [2023-12-15 22:01:24,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:01:24,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-15 22:01:24,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:24,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-15 22:01:24,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 22:01:24,373 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2023-12-15 22:01:24,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:24,386 INFO L93 Difference]: Finished difference Result 29 states and 43 transitions. [2023-12-15 22:01:24,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-15 22:01:24,388 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 [2023-12-15 22:01:24,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:24,393 INFO L225 Difference]: With dead ends: 29 [2023-12-15 22:01:24,393 INFO L226 Difference]: Without dead ends: 14 [2023-12-15 22:01:24,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 22:01:24,397 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:24,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:01:24,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-12-15 22:01:24,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-12-15 22:01:24,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:24,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2023-12-15 22:01:24,417 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2023-12-15 22:01:24,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:24,417 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2023-12-15 22:01:24,418 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) [2023-12-15 22:01:24,418 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2023-12-15 22:01:24,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-15 22:01:24,418 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:24,418 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:24,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-15 22:01:24,419 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:24,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:24,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1079105914, now seen corresponding path program 1 times [2023-12-15 22:01:24,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:24,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772747726] [2023-12-15 22:01:24,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:24,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:24,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:24,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772747726] [2023-12-15 22:01:24,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772747726] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 22:01:24,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 22:01:24,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 22:01:24,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699514007] [2023-12-15 22:01:24,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:01:24,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 22:01:24,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:24,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 22:01:24,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 22:01:24,604 INFO L87 Difference]: Start difference. First operand 14 states and 17 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) [2023-12-15 22:01:24,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:24,636 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2023-12-15 22:01:24,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-15 22:01:24,636 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 [2023-12-15 22:01:24,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:24,637 INFO L225 Difference]: With dead ends: 19 [2023-12-15 22:01:24,637 INFO L226 Difference]: Without dead ends: 17 [2023-12-15 22:01:24,637 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 [2023-12-15 22:01:24,638 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:24,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:01:24,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-15 22:01:24,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2023-12-15 22:01:24,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:24,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-12-15 22:01:24,642 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2023-12-15 22:01:24,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:24,642 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-12-15 22:01:24,642 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) [2023-12-15 22:01:24,642 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-12-15 22:01:24,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-15 22:01:24,643 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:24,643 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:24,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-15 22:01:24,643 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:24,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:24,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1318207955, now seen corresponding path program 1 times [2023-12-15 22:01:24,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:24,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861488987] [2023-12-15 22:01:24,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:24,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:24,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:24,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:24,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861488987] [2023-12-15 22:01:24,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861488987] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 22:01:24,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 22:01:24,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-15 22:01:24,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629166156] [2023-12-15 22:01:24,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:01:24,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-15 22:01:24,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:24,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-15 22:01:24,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-15 22:01:24,736 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:24,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:24,787 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2023-12-15 22:01:24,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-15 22:01:24,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-15 22:01:24,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:24,790 INFO L225 Difference]: With dead ends: 33 [2023-12-15 22:01:24,790 INFO L226 Difference]: Without dead ends: 22 [2023-12-15 22:01:24,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-15 22:01:24,795 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:24,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:01:24,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-15 22:01:24,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2023-12-15 22:01:24,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 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) [2023-12-15 22:01:24,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-12-15 22:01:24,816 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 15 [2023-12-15 22:01:24,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:24,816 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-12-15 22:01:24,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:24,817 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-12-15 22:01:24,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-15 22:01:24,817 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:24,817 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:24,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-15 22:01:24,817 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:24,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:24,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1219861422, now seen corresponding path program 1 times [2023-12-15 22:01:24,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:24,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565805540] [2023-12-15 22:01:24,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:24,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:24,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:24,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565805540] [2023-12-15 22:01:24,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565805540] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:01:24,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377370508] [2023-12-15 22:01:24,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:24,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:24,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:24,917 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:01:24,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 22:01:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:24,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 22:01:24,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:01:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:25,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:01:25,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:25,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377370508] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:01:25,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:01:25,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2023-12-15 22:01:25,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119639131] [2023-12-15 22:01:25,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:01:25,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-15 22:01:25,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:25,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-15 22:01:25,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-12-15 22:01:25,054 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:25,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:25,194 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2023-12-15 22:01:25,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-15 22:01:25,194 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-15 22:01:25,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:25,195 INFO L225 Difference]: With dead ends: 44 [2023-12-15 22:01:25,196 INFO L226 Difference]: Without dead ends: 33 [2023-12-15 22:01:25,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-12-15 22:01:25,203 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:25,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 52 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:01:25,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-15 22:01:25,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2023-12-15 22:01:25,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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) [2023-12-15 22:01:25,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-12-15 22:01:25,213 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2023-12-15 22:01:25,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:25,213 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-12-15 22:01:25,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:25,213 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-12-15 22:01:25,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-15 22:01:25,214 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:25,214 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:25,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-15 22:01:25,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:25,419 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:25,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:25,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1316760726, now seen corresponding path program 2 times [2023-12-15 22:01:25,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:25,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792967293] [2023-12-15 22:01:25,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:25,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:25,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:25,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792967293] [2023-12-15 22:01:25,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792967293] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:01:25,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152534653] [2023-12-15 22:01:25,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 22:01:25,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:25,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:25,522 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:01:25,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 22:01:25,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 22:01:25,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:01:25,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-15 22:01:25,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:01:25,627 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:25,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:01:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:25,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152534653] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:01:25,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:01:25,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2023-12-15 22:01:25,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359709014] [2023-12-15 22:01:25,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:01:25,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-15 22:01:25,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:25,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-15 22:01:25,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-12-15 22:01:25,695 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:25,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:25,907 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2023-12-15 22:01:25,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-15 22:01:25,907 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-15 22:01:25,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:25,909 INFO L225 Difference]: With dead ends: 58 [2023-12-15 22:01:25,909 INFO L226 Difference]: Without dead ends: 43 [2023-12-15 22:01:25,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2023-12-15 22:01:25,910 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 37 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:25,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 66 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:01:25,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-12-15 22:01:25,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2023-12-15 22:01:25,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:25,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-12-15 22:01:25,913 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 23 [2023-12-15 22:01:25,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:25,914 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-12-15 22:01:25,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:25,914 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-12-15 22:01:25,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-15 22:01:25,914 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:25,914 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:25,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-15 22:01:26,120 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 [2023-12-15 22:01:26,121 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:26,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:26,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1865733826, now seen corresponding path program 3 times [2023-12-15 22:01:26,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:26,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326867976] [2023-12-15 22:01:26,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:26,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:26,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:26,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326867976] [2023-12-15 22:01:26,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326867976] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:01:26,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163337748] [2023-12-15 22:01:26,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 22:01:26,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:26,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:26,213 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:01:26,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 22:01:26,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-15 22:01:26,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:01:26,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-15 22:01:26,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:01:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:26,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:01:26,415 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:26,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163337748] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:01:26,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:01:26,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2023-12-15 22:01:26,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38158426] [2023-12-15 22:01:26,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:01:26,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-15 22:01:26,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:26,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-15 22:01:26,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-12-15 22:01:26,419 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:26,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:26,503 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2023-12-15 22:01:26,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-15 22:01:26,503 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-15 22:01:26,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:26,503 INFO L225 Difference]: With dead ends: 67 [2023-12-15 22:01:26,503 INFO L226 Difference]: Without dead ends: 48 [2023-12-15 22:01:26,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2023-12-15 22:01:26,504 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:26,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 79 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:01:26,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-15 22:01:26,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2023-12-15 22:01:26,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 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) [2023-12-15 22:01:26,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-12-15 22:01:26,507 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2023-12-15 22:01:26,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:26,508 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-12-15 22:01:26,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:26,508 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-12-15 22:01:26,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-15 22:01:26,508 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:26,508 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:26,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-15 22:01:26,712 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 [2023-12-15 22:01:26,713 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:26,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:26,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1202542631, now seen corresponding path program 4 times [2023-12-15 22:01:26,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:26,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893920099] [2023-12-15 22:01:26,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:26,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:26,816 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:26,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:26,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893920099] [2023-12-15 22:01:26,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893920099] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:01:26,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629167336] [2023-12-15 22:01:26,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 22:01:26,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:26,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:26,817 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:01:26,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-15 22:01:26,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 22:01:26,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:01:26,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-15 22:01:26,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:01:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:26,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:01:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:26,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629167336] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:01:26,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:01:26,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2023-12-15 22:01:26,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560630915] [2023-12-15 22:01:26,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:01:26,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-15 22:01:26,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:26,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-15 22:01:26,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-12-15 22:01:26,955 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:27,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:27,029 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2023-12-15 22:01:27,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-15 22:01:27,030 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-12-15 22:01:27,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:27,030 INFO L225 Difference]: With dead ends: 49 [2023-12-15 22:01:27,030 INFO L226 Difference]: Without dead ends: 47 [2023-12-15 22:01:27,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2023-12-15 22:01:27,031 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:27,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 81 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:01:27,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-15 22:01:27,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2023-12-15 22:01:27,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:27,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2023-12-15 22:01:27,034 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 31 [2023-12-15 22:01:27,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:27,034 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2023-12-15 22:01:27,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:27,035 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2023-12-15 22:01:27,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-15 22:01:27,035 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:27,035 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:27,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-15 22:01:27,239 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 [2023-12-15 22:01:27,240 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:27,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:27,240 INFO L85 PathProgramCache]: Analyzing trace with hash 286167821, now seen corresponding path program 5 times [2023-12-15 22:01:27,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:27,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148791264] [2023-12-15 22:01:27,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:27,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 38 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:27,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:27,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148791264] [2023-12-15 22:01:27,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148791264] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:01:27,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16677495] [2023-12-15 22:01:27,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 22:01:27,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:27,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:27,387 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:01:27,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-15 22:01:27,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-15 22:01:27,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:01:27,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-15 22:01:27,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:01:27,555 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 50 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:27,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:01:27,636 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 50 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:27,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16677495] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:01:27,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:01:27,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2023-12-15 22:01:27,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975965463] [2023-12-15 22:01:27,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:01:27,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-15 22:01:27,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:27,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-15 22:01:27,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2023-12-15 22:01:27,638 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:27,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:27,793 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2023-12-15 22:01:27,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-15 22:01:27,793 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-12-15 22:01:27,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:27,794 INFO L225 Difference]: With dead ends: 114 [2023-12-15 22:01:27,795 INFO L226 Difference]: Without dead ends: 68 [2023-12-15 22:01:27,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2023-12-15 22:01:27,796 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 67 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:27,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 106 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:01:27,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-15 22:01:27,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 44. [2023-12-15 22:01:27,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 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) [2023-12-15 22:01:27,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2023-12-15 22:01:27,804 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 39 [2023-12-15 22:01:27,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:27,805 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2023-12-15 22:01:27,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:27,805 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2023-12-15 22:01:27,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-15 22:01:27,806 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:27,806 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:27,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-15 22:01:28,013 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 [2023-12-15 22:01:28,013 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:28,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:28,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1270551529, now seen corresponding path program 6 times [2023-12-15 22:01:28,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:28,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012399374] [2023-12-15 22:01:28,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:28,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 30 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:28,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:28,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012399374] [2023-12-15 22:01:28,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012399374] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:01:28,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596561097] [2023-12-15 22:01:28,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-15 22:01:28,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:28,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:28,159 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:01:28,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-15 22:01:28,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-15 22:01:28,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:01:28,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-15 22:01:28,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:01:28,253 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 42 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:28,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:01:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 42 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:28,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596561097] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:01:28,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:01:28,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2023-12-15 22:01:28,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781287553] [2023-12-15 22:01:28,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:01:28,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-15 22:01:28,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:28,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-15 22:01:28,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-12-15 22:01:28,344 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 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) [2023-12-15 22:01:28,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:28,419 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2023-12-15 22:01:28,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-15 22:01:28,419 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 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 43 [2023-12-15 22:01:28,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:28,422 INFO L225 Difference]: With dead ends: 61 [2023-12-15 22:01:28,422 INFO L226 Difference]: Without dead ends: 59 [2023-12-15 22:01:28,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 76 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2023-12-15 22:01:28,424 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:28,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 83 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:01:28,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-15 22:01:28,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2023-12-15 22:01:28,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:28,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2023-12-15 22:01:28,439 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 43 [2023-12-15 22:01:28,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:28,439 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2023-12-15 22:01:28,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 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) [2023-12-15 22:01:28,439 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2023-12-15 22:01:28,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-15 22:01:28,440 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:28,440 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:28,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-15 22:01:28,646 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 [2023-12-15 22:01:28,646 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:28,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:28,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1116419837, now seen corresponding path program 7 times [2023-12-15 22:01:28,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:28,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850957244] [2023-12-15 22:01:28,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:28,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:28,797 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 80 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:28,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:28,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850957244] [2023-12-15 22:01:28,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850957244] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:01:28,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55551257] [2023-12-15 22:01:28,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-15 22:01:28,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:28,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:28,800 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:01:28,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-15 22:01:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:28,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-15 22:01:28,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:01:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 96 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 22:01:29,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:01:29,114 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 96 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 22:01:29,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55551257] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:01:29,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:01:29,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 26 [2023-12-15 22:01:29,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377461966] [2023-12-15 22:01:29,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:01:29,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-15 22:01:29,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:29,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-15 22:01:29,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2023-12-15 22:01:29,116 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 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) [2023-12-15 22:01:29,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:29,248 INFO L93 Difference]: Finished difference Result 115 states and 133 transitions. [2023-12-15 22:01:29,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-15 22:01:29,248 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-12-15 22:01:29,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:29,248 INFO L225 Difference]: With dead ends: 115 [2023-12-15 22:01:29,248 INFO L226 Difference]: Without dead ends: 82 [2023-12-15 22:01:29,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 81 SyntacticMatches, 12 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-12-15 22:01:29,249 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 74 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:29,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 113 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:01:29,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-15 22:01:29,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 54. [2023-12-15 22:01:29,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 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) [2023-12-15 22:01:29,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2023-12-15 22:01:29,252 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 51 [2023-12-15 22:01:29,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:29,252 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2023-12-15 22:01:29,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 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) [2023-12-15 22:01:29,252 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2023-12-15 22:01:29,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-15 22:01:29,253 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:29,253 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:29,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-15 22:01:29,457 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 [2023-12-15 22:01:29,457 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:29,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:29,458 INFO L85 PathProgramCache]: Analyzing trace with hash 885943970, now seen corresponding path program 8 times [2023-12-15 22:01:29,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:29,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215833859] [2023-12-15 22:01:29,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:29,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 80 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:29,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:29,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215833859] [2023-12-15 22:01:29,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215833859] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:01:29,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777619634] [2023-12-15 22:01:29,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 22:01:29,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:29,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:29,637 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:01:29,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-15 22:01:29,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 22:01:29,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:01:29,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-15 22:01:29,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:01:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 98 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:29,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:01:30,009 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 98 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:30,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777619634] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:01:30,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:01:30,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 28 [2023-12-15 22:01:30,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063984016] [2023-12-15 22:01:30,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:01:30,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-15 22:01:30,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:30,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-15 22:01:30,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2023-12-15 22:01:30,014 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:30,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:30,175 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2023-12-15 22:01:30,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-15 22:01:30,176 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-12-15 22:01:30,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:30,176 INFO L225 Difference]: With dead ends: 123 [2023-12-15 22:01:30,176 INFO L226 Difference]: Without dead ends: 88 [2023-12-15 22:01:30,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 14 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=329, Invalid=931, Unknown=0, NotChecked=0, Total=1260 [2023-12-15 22:01:30,177 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 97 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:30,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 157 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:01:30,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-12-15 22:01:30,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2023-12-15 22:01:30,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 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) [2023-12-15 22:01:30,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2023-12-15 22:01:30,180 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 53 [2023-12-15 22:01:30,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:30,180 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2023-12-15 22:01:30,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:30,180 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2023-12-15 22:01:30,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-15 22:01:30,181 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:30,181 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:30,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-15 22:01:30,385 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 [2023-12-15 22:01:30,385 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:30,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:30,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1558032121, now seen corresponding path program 9 times [2023-12-15 22:01:30,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:30,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931213204] [2023-12-15 22:01:30,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:30,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:30,531 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 56 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:30,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:30,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931213204] [2023-12-15 22:01:30,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931213204] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:01:30,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898724507] [2023-12-15 22:01:30,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 22:01:30,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:30,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:30,533 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:01:30,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-15 22:01:30,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-15 22:01:30,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:01:30,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-15 22:01:30,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:01:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 72 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:30,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:01:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 72 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:30,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898724507] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:01:30,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:01:30,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 14 [2023-12-15 22:01:30,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72180824] [2023-12-15 22:01:30,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:01:30,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-15 22:01:30,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:30,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-15 22:01:30,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2023-12-15 22:01:30,761 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 14 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) [2023-12-15 22:01:30,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:30,873 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2023-12-15 22:01:30,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-15 22:01:30,875 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 14 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 55 [2023-12-15 22:01:30,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:30,876 INFO L225 Difference]: With dead ends: 73 [2023-12-15 22:01:30,876 INFO L226 Difference]: Without dead ends: 71 [2023-12-15 22:01:30,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 98 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=214, Invalid=386, Unknown=0, NotChecked=0, Total=600 [2023-12-15 22:01:30,877 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:30,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 103 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:01:30,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-15 22:01:30,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2023-12-15 22:01:30,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:30,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2023-12-15 22:01:30,879 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 55 [2023-12-15 22:01:30,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:30,880 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2023-12-15 22:01:30,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 14 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) [2023-12-15 22:01:30,880 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2023-12-15 22:01:30,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-15 22:01:30,880 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:30,880 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:30,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-15 22:01:31,100 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 [2023-12-15 22:01:31,101 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:31,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:31,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1075008531, now seen corresponding path program 10 times [2023-12-15 22:01:31,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:31,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70384799] [2023-12-15 22:01:31,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:31,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 138 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:31,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:31,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70384799] [2023-12-15 22:01:31,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70384799] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:01:31,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362689046] [2023-12-15 22:01:31,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 22:01:31,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:31,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:31,341 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:01:31,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-15 22:01:31,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 22:01:31,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:01:31,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-15 22:01:31,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:01:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 162 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:31,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:01:31,839 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 162 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:31,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362689046] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:01:31,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:01:31,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 35 [2023-12-15 22:01:31,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805979232] [2023-12-15 22:01:31,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:01:31,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-15 22:01:31,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:31,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-15 22:01:31,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2023-12-15 22:01:31,841 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 35 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 35 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:32,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:32,116 INFO L93 Difference]: Finished difference Result 186 states and 211 transitions. [2023-12-15 22:01:32,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-15 22:01:32,116 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 35 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-12-15 22:01:32,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:32,117 INFO L225 Difference]: With dead ends: 186 [2023-12-15 22:01:32,117 INFO L226 Difference]: Without dead ends: 108 [2023-12-15 22:01:32,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 97 SyntacticMatches, 15 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=719, Invalid=2143, Unknown=0, NotChecked=0, Total=2862 [2023-12-15 22:01:32,119 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 162 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:32,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 163 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:01:32,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-12-15 22:01:32,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2023-12-15 22:01:32,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2023-12-15 22:01:32,122 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 63 [2023-12-15 22:01:32,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:32,122 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2023-12-15 22:01:32,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 35 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:32,122 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2023-12-15 22:01:32,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-15 22:01:32,122 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:32,122 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:32,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-15 22:01:32,328 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 [2023-12-15 22:01:32,328 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:32,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:32,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1781856521, now seen corresponding path program 11 times [2023-12-15 22:01:32,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:32,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381367783] [2023-12-15 22:01:32,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:32,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:32,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 90 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:32,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:32,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381367783] [2023-12-15 22:01:32,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381367783] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:01:32,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147820041] [2023-12-15 22:01:32,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 22:01:32,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:32,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:32,555 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:01:32,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-15 22:01:32,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-12-15 22:01:32,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:01:32,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-15 22:01:32,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:01:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 110 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:32,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:01:32,839 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 110 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:32,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147820041] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:01:32,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:01:32,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 16 [2023-12-15 22:01:32,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197003924] [2023-12-15 22:01:32,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:01:32,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-15 22:01:32,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:32,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-15 22:01:32,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2023-12-15 22:01:32,841 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 16 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:32,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:32,971 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2023-12-15 22:01:32,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-15 22:01:32,971 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 16 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-12-15 22:01:32,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:32,971 INFO L225 Difference]: With dead ends: 85 [2023-12-15 22:01:32,972 INFO L226 Difference]: Without dead ends: 83 [2023-12-15 22:01:32,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 120 SyntacticMatches, 19 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=291, Invalid=521, Unknown=0, NotChecked=0, Total=812 [2023-12-15 22:01:32,972 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 33 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:32,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 112 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:01:32,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-15 22:01:32,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2023-12-15 22:01:32,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:32,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2023-12-15 22:01:32,975 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 67 [2023-12-15 22:01:32,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:32,975 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2023-12-15 22:01:32,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 16 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:32,976 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2023-12-15 22:01:32,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-15 22:01:32,976 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:32,976 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:32,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-15 22:01:33,181 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 [2023-12-15 22:01:33,181 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:33,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:33,181 INFO L85 PathProgramCache]: Analyzing trace with hash -315067939, now seen corresponding path program 12 times [2023-12-15 22:01:33,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:33,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239207878] [2023-12-15 22:01:33,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:33,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:33,487 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 212 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:33,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:33,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239207878] [2023-12-15 22:01:33,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239207878] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:01:33,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829735980] [2023-12-15 22:01:33,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-15 22:01:33,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:33,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:33,489 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:01:33,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-15 22:01:33,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-12-15 22:01:33,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:01:33,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-15 22:01:33,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:01:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 242 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:33,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:01:34,122 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 242 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:34,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829735980] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:01:34,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:01:34,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 41 [2023-12-15 22:01:34,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347076499] [2023-12-15 22:01:34,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:01:34,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-15 22:01:34,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:34,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-15 22:01:34,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=1246, Unknown=0, NotChecked=0, Total=1640 [2023-12-15 22:01:34,125 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:34,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:34,470 INFO L93 Difference]: Finished difference Result 222 states and 251 transitions. [2023-12-15 22:01:34,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-15 22:01:34,470 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-12-15 22:01:34,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:34,470 INFO L225 Difference]: With dead ends: 222 [2023-12-15 22:01:34,470 INFO L226 Difference]: Without dead ends: 128 [2023-12-15 22:01:34,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 115 SyntacticMatches, 19 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1005, Invalid=3027, Unknown=0, NotChecked=0, Total=4032 [2023-12-15 22:01:34,474 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 210 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:34,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 207 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:01:34,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-12-15 22:01:34,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 80. [2023-12-15 22:01:34,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:34,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2023-12-15 22:01:34,478 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 75 [2023-12-15 22:01:34,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:34,478 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2023-12-15 22:01:34,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:34,478 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2023-12-15 22:01:34,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-15 22:01:34,478 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:34,479 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:34,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-15 22:01:34,684 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 [2023-12-15 22:01:34,684 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:34,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:34,685 INFO L85 PathProgramCache]: Analyzing trace with hash -897282585, now seen corresponding path program 13 times [2023-12-15 22:01:34,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:34,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174834831] [2023-12-15 22:01:34,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:34,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 132 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:34,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:34,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174834831] [2023-12-15 22:01:34,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174834831] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:01:34,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930660501] [2023-12-15 22:01:34,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-15 22:01:34,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:34,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:34,948 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:01:34,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-15 22:01:35,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:35,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-15 22:01:35,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:01:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 156 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:35,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:01:35,239 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 156 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:35,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930660501] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:01:35,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:01:35,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 18 [2023-12-15 22:01:35,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258986061] [2023-12-15 22:01:35,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:01:35,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-15 22:01:35,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:35,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-15 22:01:35,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2023-12-15 22:01:35,241 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:35,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:35,385 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2023-12-15 22:01:35,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-15 22:01:35,386 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-12-15 22:01:35,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:35,386 INFO L225 Difference]: With dead ends: 97 [2023-12-15 22:01:35,386 INFO L226 Difference]: Without dead ends: 95 [2023-12-15 22:01:35,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 142 SyntacticMatches, 23 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=380, Invalid=676, Unknown=0, NotChecked=0, Total=1056 [2023-12-15 22:01:35,387 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:35,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 137 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:01:35,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-12-15 22:01:35,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2023-12-15 22:01:35,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 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) [2023-12-15 22:01:35,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2023-12-15 22:01:35,390 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 79 [2023-12-15 22:01:35,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:35,391 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2023-12-15 22:01:35,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:35,391 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2023-12-15 22:01:35,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-15 22:01:35,391 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:35,391 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:35,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-15 22:01:35,596 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 [2023-12-15 22:01:35,596 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:35,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:35,596 INFO L85 PathProgramCache]: Analyzing trace with hash 724830413, now seen corresponding path program 14 times [2023-12-15 22:01:35,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:35,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591510848] [2023-12-15 22:01:35,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:35,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 302 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:35,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:35,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591510848] [2023-12-15 22:01:35,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591510848] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:01:35,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022974519] [2023-12-15 22:01:35,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 22:01:35,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:35,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:35,989 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:01:35,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-15 22:01:36,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 22:01:36,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:01:36,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-15 22:01:36,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:01:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 336 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 22:01:36,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:01:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 336 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 22:01:36,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022974519] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:01:36,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:01:36,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 44 [2023-12-15 22:01:36,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122820094] [2023-12-15 22:01:36,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:01:36,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-15 22:01:36,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:36,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-15 22:01:36,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=1454, Unknown=0, NotChecked=0, Total=1892 [2023-12-15 22:01:36,699 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 44 states, 44 states have (on average 3.340909090909091) internal successors, (147), 44 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:37,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:37,017 INFO L93 Difference]: Finished difference Result 199 states and 229 transitions. [2023-12-15 22:01:37,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-15 22:01:37,017 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.340909090909091) internal successors, (147), 44 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2023-12-15 22:01:37,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:37,018 INFO L225 Difference]: With dead ends: 199 [2023-12-15 22:01:37,018 INFO L226 Difference]: Without dead ends: 142 [2023-12-15 22:01:37,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 135 SyntacticMatches, 24 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=804, Invalid=2388, Unknown=0, NotChecked=0, Total=3192 [2023-12-15 22:01:37,022 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 195 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:37,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 271 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 22:01:37,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-12-15 22:01:37,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 90. [2023-12-15 22:01:37,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 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) [2023-12-15 22:01:37,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2023-12-15 22:01:37,026 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 87 [2023-12-15 22:01:37,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:37,026 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2023-12-15 22:01:37,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.340909090909091) internal successors, (147), 44 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:37,027 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2023-12-15 22:01:37,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-15 22:01:37,027 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:37,027 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:37,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-15 22:01:37,231 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 [2023-12-15 22:01:37,232 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:37,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:37,232 INFO L85 PathProgramCache]: Analyzing trace with hash 831721970, now seen corresponding path program 15 times [2023-12-15 22:01:37,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:37,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946897402] [2023-12-15 22:01:37,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:37,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 302 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:37,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:37,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946897402] [2023-12-15 22:01:37,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946897402] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:01:37,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121477578] [2023-12-15 22:01:37,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 22:01:37,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:37,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:37,656 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:01:37,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-15 22:01:37,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-12-15 22:01:37,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:01:37,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-15 22:01:37,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:01:38,150 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 338 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:38,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:01:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 338 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:38,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121477578] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:01:38,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:01:38,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 46 [2023-12-15 22:01:38,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282072183] [2023-12-15 22:01:38,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:01:38,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-12-15 22:01:38,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:38,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-12-15 22:01:38,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1587, Unknown=0, NotChecked=0, Total=2070 [2023-12-15 22:01:38,430 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 46 states, 46 states have (on average 3.239130434782609) internal successors, (149), 46 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:38,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:38,762 INFO L93 Difference]: Finished difference Result 207 states and 239 transitions. [2023-12-15 22:01:38,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-15 22:01:38,762 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.239130434782609) internal successors, (149), 46 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2023-12-15 22:01:38,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:38,763 INFO L225 Difference]: With dead ends: 207 [2023-12-15 22:01:38,763 INFO L226 Difference]: Without dead ends: 148 [2023-12-15 22:01:38,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 136 SyntacticMatches, 26 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=905, Invalid=2635, Unknown=0, NotChecked=0, Total=3540 [2023-12-15 22:01:38,764 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 199 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:38,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 303 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 22:01:38,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-12-15 22:01:38,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 92. [2023-12-15 22:01:38,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:38,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2023-12-15 22:01:38,768 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 89 [2023-12-15 22:01:38,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:38,768 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2023-12-15 22:01:38,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.239130434782609) internal successors, (149), 46 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:38,768 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2023-12-15 22:01:38,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-12-15 22:01:38,769 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:38,769 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:38,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-15 22:01:38,972 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 [2023-12-15 22:01:38,973 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:38,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:38,973 INFO L85 PathProgramCache]: Analyzing trace with hash 475293143, now seen corresponding path program 16 times [2023-12-15 22:01:38,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:38,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660573594] [2023-12-15 22:01:38,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:38,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 182 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:39,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:39,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660573594] [2023-12-15 22:01:39,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660573594] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:01:39,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851748101] [2023-12-15 22:01:39,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 22:01:39,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:39,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:39,276 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:01:39,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-15 22:01:39,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 22:01:39,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:01:39,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-15 22:01:39,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:01:39,418 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 210 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:39,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:01:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 210 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:39,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851748101] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:01:39,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:01:39,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 20 [2023-12-15 22:01:39,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211239758] [2023-12-15 22:01:39,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:01:39,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-15 22:01:39,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:39,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-15 22:01:39,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2023-12-15 22:01:39,640 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:39,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:39,812 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2023-12-15 22:01:39,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-15 22:01:39,812 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2023-12-15 22:01:39,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:39,813 INFO L225 Difference]: With dead ends: 109 [2023-12-15 22:01:39,813 INFO L226 Difference]: Without dead ends: 107 [2023-12-15 22:01:39,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 164 SyntacticMatches, 27 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=481, Invalid=851, Unknown=0, NotChecked=0, Total=1332 [2023-12-15 22:01:39,813 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:39,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 146 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:01:39,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-12-15 22:01:39,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2023-12-15 22:01:39,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 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) [2023-12-15 22:01:39,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2023-12-15 22:01:39,817 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 91 [2023-12-15 22:01:39,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:39,817 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2023-12-15 22:01:39,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:39,818 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2023-12-15 22:01:39,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-12-15 22:01:39,818 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:39,818 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:39,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-15 22:01:40,018 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 [2023-12-15 22:01:40,019 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:40,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:40,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1218121539, now seen corresponding path program 17 times [2023-12-15 22:01:40,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:40,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726840516] [2023-12-15 22:01:40,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:40,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 408 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:40,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:40,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726840516] [2023-12-15 22:01:40,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726840516] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:01:40,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760616636] [2023-12-15 22:01:40,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 22:01:40,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:40,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:40,465 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) [2023-12-15 22:01:40,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-15 22:01:40,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2023-12-15 22:01:40,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:01:40,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-15 22:01:40,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:01:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 450 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:41,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:01:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 450 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:41,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760616636] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:01:41,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:01:41,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 53 [2023-12-15 22:01:41,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127800083] [2023-12-15 22:01:41,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:01:41,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-12-15 22:01:41,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:41,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-12-15 22:01:41,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=2106, Unknown=0, NotChecked=0, Total=2756 [2023-12-15 22:01:41,437 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 53 states, 53 states have (on average 3.3207547169811322) internal successors, (176), 53 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:42,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:42,018 INFO L93 Difference]: Finished difference Result 294 states and 331 transitions. [2023-12-15 22:01:42,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-12-15 22:01:42,018 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.3207547169811322) internal successors, (176), 53 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2023-12-15 22:01:42,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:42,021 INFO L225 Difference]: With dead ends: 294 [2023-12-15 22:01:42,021 INFO L226 Difference]: Without dead ends: 168 [2023-12-15 22:01:42,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 151 SyntacticMatches, 27 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2260 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1721, Invalid=5251, Unknown=0, NotChecked=0, Total=6972 [2023-12-15 22:01:42,023 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 231 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:42,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 445 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 22:01:42,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-12-15 22:01:42,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 104. [2023-12-15 22:01:42,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 103 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:42,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2023-12-15 22:01:42,028 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 99 [2023-12-15 22:01:42,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:42,029 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2023-12-15 22:01:42,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.3207547169811322) internal successors, (176), 53 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:42,029 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2023-12-15 22:01:42,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-15 22:01:42,029 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:42,029 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:42,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-15 22:01:42,234 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 [2023-12-15 22:01:42,235 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:42,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:42,235 INFO L85 PathProgramCache]: Analyzing trace with hash -486535481, now seen corresponding path program 18 times [2023-12-15 22:01:42,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:42,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222160065] [2023-12-15 22:01:42,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:42,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 240 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:42,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:42,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222160065] [2023-12-15 22:01:42,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222160065] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:01:42,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786919890] [2023-12-15 22:01:42,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-15 22:01:42,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:42,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:42,624 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) [2023-12-15 22:01:42,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-15 22:01:42,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-12-15 22:01:42,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:01:42,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-15 22:01:42,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:01:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 272 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:42,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:01:43,075 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 272 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:43,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786919890] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:01:43,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:01:43,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 22 [2023-12-15 22:01:43,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831702357] [2023-12-15 22:01:43,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:01:43,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-15 22:01:43,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:43,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-15 22:01:43,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2023-12-15 22:01:43,076 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:43,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:43,280 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2023-12-15 22:01:43,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-15 22:01:43,280 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-12-15 22:01:43,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:43,281 INFO L225 Difference]: With dead ends: 121 [2023-12-15 22:01:43,281 INFO L226 Difference]: Without dead ends: 119 [2023-12-15 22:01:43,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 186 SyntacticMatches, 31 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=594, Invalid=1046, Unknown=0, NotChecked=0, Total=1640 [2023-12-15 22:01:43,282 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 28 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:43,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 182 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:01:43,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-12-15 22:01:43,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2023-12-15 22:01:43,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.0360360360360361) internal successors, (115), 111 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:43,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2023-12-15 22:01:43,287 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 103 [2023-12-15 22:01:43,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:43,287 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2023-12-15 22:01:43,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:43,287 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2023-12-15 22:01:43,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-12-15 22:01:43,288 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:43,288 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:43,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-15 22:01:43,492 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 [2023-12-15 22:01:43,493 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:43,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:43,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1945065043, now seen corresponding path program 19 times [2023-12-15 22:01:43,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:43,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108689734] [2023-12-15 22:01:43,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:43,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 530 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:44,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:44,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108689734] [2023-12-15 22:01:44,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108689734] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:01:44,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907468806] [2023-12-15 22:01:44,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-15 22:01:44,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:44,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:44,123 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) [2023-12-15 22:01:44,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-15 22:01:44,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:44,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-15 22:01:44,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:01:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 576 proven. 272 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 22:01:44,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:01:45,195 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 576 proven. 272 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 22:01:45,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907468806] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:01:45,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:01:45,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 56 [2023-12-15 22:01:45,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952010909] [2023-12-15 22:01:45,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:01:45,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-12-15 22:01:45,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:45,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-12-15 22:01:45,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=706, Invalid=2374, Unknown=0, NotChecked=0, Total=3080 [2023-12-15 22:01:45,197 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand has 56 states, 56 states have (on average 3.3392857142857144) internal successors, (187), 56 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:45,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:45,671 INFO L93 Difference]: Finished difference Result 255 states and 293 transitions. [2023-12-15 22:01:45,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-15 22:01:45,671 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.3392857142857144) internal successors, (187), 56 states have internal predecessors, (187), 0 states have call successors, (0), 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 111 [2023-12-15 22:01:45,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:45,673 INFO L225 Difference]: With dead ends: 255 [2023-12-15 22:01:45,673 INFO L226 Difference]: Without dead ends: 182 [2023-12-15 22:01:45,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 171 SyntacticMatches, 32 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1947 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1320, Invalid=3936, Unknown=0, NotChecked=0, Total=5256 [2023-12-15 22:01:45,674 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 179 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:45,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 407 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 22:01:45,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-12-15 22:01:45,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 114. [2023-12-15 22:01:45,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0353982300884956) internal successors, (117), 113 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:45,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2023-12-15 22:01:45,679 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 111 [2023-12-15 22:01:45,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:45,679 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2023-12-15 22:01:45,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.3392857142857144) internal successors, (187), 56 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:45,680 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2023-12-15 22:01:45,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-15 22:01:45,680 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:45,680 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:45,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-15 22:01:45,884 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 [2023-12-15 22:01:45,884 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:45,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:45,885 INFO L85 PathProgramCache]: Analyzing trace with hash -216017966, now seen corresponding path program 20 times [2023-12-15 22:01:45,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:45,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437928210] [2023-12-15 22:01:45,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:45,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 530 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:46,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:46,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437928210] [2023-12-15 22:01:46,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437928210] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:01:46,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456989791] [2023-12-15 22:01:46,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 22:01:46,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:46,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:46,468 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) [2023-12-15 22:01:46,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-15 22:01:46,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 22:01:46,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:01:46,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-15 22:01:46,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:01:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 578 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:47,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:01:47,686 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 578 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:47,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456989791] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:01:47,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:01:47,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 58 [2023-12-15 22:01:47,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775580858] [2023-12-15 22:01:47,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:01:47,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-12-15 22:01:47,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:47,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-12-15 22:01:47,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=2543, Unknown=0, NotChecked=0, Total=3306 [2023-12-15 22:01:47,688 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand has 58 states, 58 states have (on average 3.2586206896551726) internal successors, (189), 58 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:48,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:48,092 INFO L93 Difference]: Finished difference Result 263 states and 303 transitions. [2023-12-15 22:01:48,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-15 22:01:48,093 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.2586206896551726) internal successors, (189), 58 states have internal predecessors, (189), 0 states have call successors, (0), 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 113 [2023-12-15 22:01:48,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:48,093 INFO L225 Difference]: With dead ends: 263 [2023-12-15 22:01:48,094 INFO L226 Difference]: Without dead ends: 188 [2023-12-15 22:01:48,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 172 SyntacticMatches, 34 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2100 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1449, Invalid=4251, Unknown=0, NotChecked=0, Total=5700 [2023-12-15 22:01:48,095 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 279 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:48,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 360 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 22:01:48,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-12-15 22:01:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 116. [2023-12-15 22:01:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0347826086956522) internal successors, (119), 115 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:48,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 119 transitions. [2023-12-15 22:01:48,102 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 119 transitions. Word has length 113 [2023-12-15 22:01:48,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:48,102 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 119 transitions. [2023-12-15 22:01:48,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.2586206896551726) internal successors, (189), 58 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:48,102 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 119 transitions. [2023-12-15 22:01:48,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-15 22:01:48,103 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:48,103 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:48,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-15 22:01:48,304 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 [2023-12-15 22:01:48,304 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:48,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:48,305 INFO L85 PathProgramCache]: Analyzing trace with hash -754120521, now seen corresponding path program 21 times [2023-12-15 22:01:48,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:48,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62222518] [2023-12-15 22:01:48,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:48,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 306 proven. 614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:48,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:48,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62222518] [2023-12-15 22:01:48,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62222518] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:01:48,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366957792] [2023-12-15 22:01:48,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 22:01:48,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:48,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:48,688 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) [2023-12-15 22:01:48,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-15 22:01:48,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2023-12-15 22:01:48,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:01:48,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-15 22:01:48,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:01:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 342 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:48,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:01:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 342 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:49,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366957792] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:01:49,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:01:49,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 24 [2023-12-15 22:01:49,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012652714] [2023-12-15 22:01:49,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:01:49,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-15 22:01:49,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:49,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-15 22:01:49,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2023-12-15 22:01:49,201 INFO L87 Difference]: Start difference. First operand 116 states and 119 transitions. Second operand has 25 states, 25 states have (on average 5.52) internal successors, (138), 24 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) [2023-12-15 22:01:49,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:49,427 INFO L93 Difference]: Finished difference Result 133 states and 137 transitions. [2023-12-15 22:01:49,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-15 22:01:49,428 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.52) internal successors, (138), 24 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) Word has length 115 [2023-12-15 22:01:49,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:49,428 INFO L225 Difference]: With dead ends: 133 [2023-12-15 22:01:49,428 INFO L226 Difference]: Without dead ends: 131 [2023-12-15 22:01:49,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 208 SyntacticMatches, 35 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=719, Invalid=1261, Unknown=0, NotChecked=0, Total=1980 [2023-12-15 22:01:49,429 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:49,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 198 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:01:49,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-12-15 22:01:49,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2023-12-15 22:01:49,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.032520325203252) internal successors, (127), 123 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:49,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2023-12-15 22:01:49,434 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 115 [2023-12-15 22:01:49,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:49,434 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2023-12-15 22:01:49,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.52) internal successors, (138), 24 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) [2023-12-15 22:01:49,434 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2023-12-15 22:01:49,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-15 22:01:49,435 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:49,435 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:49,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-15 22:01:49,635 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 [2023-12-15 22:01:49,635 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:49,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:49,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1077719965, now seen corresponding path program 22 times [2023-12-15 22:01:49,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:49,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997212099] [2023-12-15 22:01:49,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:49,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 668 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:50,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:50,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997212099] [2023-12-15 22:01:50,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997212099] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:01:50,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221371783] [2023-12-15 22:01:50,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 22:01:50,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:50,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:50,312 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) [2023-12-15 22:01:50,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-15 22:01:50,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 22:01:50,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:01:50,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-15 22:01:50,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:01:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 722 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:51,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:01:51,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 722 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:51,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221371783] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:01:51,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:01:51,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 65 [2023-12-15 22:01:51,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169780666] [2023-12-15 22:01:51,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:01:51,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-12-15 22:01:51,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:51,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-12-15 22:01:51,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=970, Invalid=3190, Unknown=0, NotChecked=0, Total=4160 [2023-12-15 22:01:51,613 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand has 65 states, 65 states have (on average 3.3230769230769233) internal successors, (216), 65 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:52,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:52,459 INFO L93 Difference]: Finished difference Result 366 states and 411 transitions. [2023-12-15 22:01:52,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-12-15 22:01:52,459 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.3230769230769233) internal successors, (216), 65 states have internal predecessors, (216), 0 states have call successors, (0), 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 123 [2023-12-15 22:01:52,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:52,460 INFO L225 Difference]: With dead ends: 366 [2023-12-15 22:01:52,460 INFO L226 Difference]: Without dead ends: 208 [2023-12-15 22:01:52,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 187 SyntacticMatches, 35 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3514 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2629, Invalid=8083, Unknown=0, NotChecked=0, Total=10712 [2023-12-15 22:01:52,462 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 399 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:52,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 551 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 22:01:52,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-12-15 22:01:52,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 128. [2023-12-15 22:01:52,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.031496062992126) internal successors, (131), 127 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:52,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 131 transitions. [2023-12-15 22:01:52,473 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 131 transitions. Word has length 123 [2023-12-15 22:01:52,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:52,473 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 131 transitions. [2023-12-15 22:01:52,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.3230769230769233) internal successors, (216), 65 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:52,474 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 131 transitions. [2023-12-15 22:01:52,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-12-15 22:01:52,474 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:52,474 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:52,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-15 22:01:52,679 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 [2023-12-15 22:01:52,679 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:52,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:52,680 INFO L85 PathProgramCache]: Analyzing trace with hash -574565465, now seen corresponding path program 23 times [2023-12-15 22:01:52,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:52,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441664822] [2023-12-15 22:01:52,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:52,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 380 proven. 762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:53,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:53,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441664822] [2023-12-15 22:01:53,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441664822] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:01:53,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188171758] [2023-12-15 22:01:53,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 22:01:53,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:53,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:53,136 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) [2023-12-15 22:01:53,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-15 22:01:53,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2023-12-15 22:01:53,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:01:53,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-15 22:01:53,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:01:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 420 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:53,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:01:53,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 420 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:53,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188171758] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:01:53,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:01:53,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 26 [2023-12-15 22:01:53,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512015755] [2023-12-15 22:01:53,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:01:53,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-15 22:01:53,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:53,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-15 22:01:53,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2023-12-15 22:01:53,711 INFO L87 Difference]: Start difference. First operand 128 states and 131 transitions. Second operand has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 26 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:54,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:54,001 INFO L93 Difference]: Finished difference Result 145 states and 149 transitions. [2023-12-15 22:01:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-15 22:01:54,002 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 26 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2023-12-15 22:01:54,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:54,002 INFO L225 Difference]: With dead ends: 145 [2023-12-15 22:01:54,002 INFO L226 Difference]: Without dead ends: 143 [2023-12-15 22:01:54,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 230 SyntacticMatches, 39 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=856, Invalid=1496, Unknown=0, NotChecked=0, Total=2352 [2023-12-15 22:01:54,003 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 32 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:54,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 202 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:01:54,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-12-15 22:01:54,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2023-12-15 22:01:54,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0296296296296297) internal successors, (139), 135 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:54,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2023-12-15 22:01:54,009 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 127 [2023-12-15 22:01:54,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:54,009 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2023-12-15 22:01:54,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 26 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:54,009 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2023-12-15 22:01:54,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-12-15 22:01:54,010 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:54,010 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:54,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-15 22:01:54,215 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 [2023-12-15 22:01:54,215 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:54,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:54,221 INFO L85 PathProgramCache]: Analyzing trace with hash -407990643, now seen corresponding path program 24 times [2023-12-15 22:01:54,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:54,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40491507] [2023-12-15 22:01:54,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:54,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:55,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 822 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:55,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:55,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40491507] [2023-12-15 22:01:55,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40491507] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:01:55,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857888211] [2023-12-15 22:01:55,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-15 22:01:55,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:55,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:55,023 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) [2023-12-15 22:01:55,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-15 22:01:55,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2023-12-15 22:01:55,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:01:55,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-15 22:01:55,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:01:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 882 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:55,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:01:56,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 882 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:56,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857888211] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:01:56,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:01:56,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 71 [2023-12-15 22:01:56,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656391083] [2023-12-15 22:01:56,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:01:56,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-12-15 22:01:56,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:56,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-12-15 22:01:56,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1154, Invalid=3816, Unknown=0, NotChecked=0, Total=4970 [2023-12-15 22:01:56,525 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand has 71 states, 71 states have (on average 3.323943661971831) internal successors, (236), 71 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:57,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:57,421 INFO L93 Difference]: Finished difference Result 402 states and 451 transitions. [2023-12-15 22:01:57,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-12-15 22:01:57,421 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.323943661971831) internal successors, (236), 71 states have internal predecessors, (236), 0 states have call successors, (0), 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 135 [2023-12-15 22:01:57,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:57,422 INFO L225 Difference]: With dead ends: 402 [2023-12-15 22:01:57,422 INFO L226 Difference]: Without dead ends: 228 [2023-12-15 22:01:57,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 205 SyntacticMatches, 39 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4243 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3155, Invalid=9727, Unknown=0, NotChecked=0, Total=12882 [2023-12-15 22:01:57,424 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 395 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:57,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 518 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 22:01:57,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-12-15 22:01:57,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 140. [2023-12-15 22:01:57,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.0287769784172662) internal successors, (143), 139 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:57,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 143 transitions. [2023-12-15 22:01:57,430 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 143 transitions. Word has length 135 [2023-12-15 22:01:57,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:57,430 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 143 transitions. [2023-12-15 22:01:57,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.323943661971831) internal successors, (236), 71 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:57,431 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 143 transitions. [2023-12-15 22:01:57,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-12-15 22:01:57,431 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:57,431 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:57,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-15 22:01:57,636 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 [2023-12-15 22:01:57,637 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:57,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:57,637 INFO L85 PathProgramCache]: Analyzing trace with hash 287371159, now seen corresponding path program 25 times [2023-12-15 22:01:57,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:57,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200410703] [2023-12-15 22:01:57,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:57,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:58,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 462 proven. 926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:58,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:01:58,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200410703] [2023-12-15 22:01:58,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200410703] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:01:58,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029849862] [2023-12-15 22:01:58,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-15 22:01:58,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:01:58,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:01:58,228 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) [2023-12-15 22:01:58,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-15 22:01:58,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:01:58,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-15 22:01:58,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:01:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 506 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:58,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:01:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 506 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:01:58,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029849862] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:01:58,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:01:58,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 28 [2023-12-15 22:01:58,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132042129] [2023-12-15 22:01:58,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:01:58,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-15 22:01:58,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:01:58,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-15 22:01:58,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2023-12-15 22:01:58,862 INFO L87 Difference]: Start difference. First operand 140 states and 143 transitions. Second operand has 29 states, 29 states have (on average 5.586206896551724) internal successors, (162), 28 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:59,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:01:59,131 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2023-12-15 22:01:59,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-12-15 22:01:59,132 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.586206896551724) internal successors, (162), 28 states have internal predecessors, (162), 0 states have call successors, (0), 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 139 [2023-12-15 22:01:59,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:01:59,136 INFO L225 Difference]: With dead ends: 157 [2023-12-15 22:01:59,136 INFO L226 Difference]: Without dead ends: 155 [2023-12-15 22:01:59,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 252 SyntacticMatches, 43 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1005, Invalid=1751, Unknown=0, NotChecked=0, Total=2756 [2023-12-15 22:01:59,139 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 61 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:01:59,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 201 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:01:59,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-12-15 22:01:59,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 148. [2023-12-15 22:01:59,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0272108843537415) internal successors, (151), 147 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:59,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2023-12-15 22:01:59,151 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 139 [2023-12-15 22:01:59,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:01:59,151 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2023-12-15 22:01:59,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.586206896551724) internal successors, (162), 28 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:01:59,151 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2023-12-15 22:01:59,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-12-15 22:01:59,152 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:01:59,152 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:01:59,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-15 22:01:59,352 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 [2023-12-15 22:01:59,352 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:01:59,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:01:59,353 INFO L85 PathProgramCache]: Analyzing trace with hash -219432323, now seen corresponding path program 26 times [2023-12-15 22:01:59,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:01:59,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666148923] [2023-12-15 22:01:59,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:01:59,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:01:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:02:00,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 992 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:02:00,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:02:00,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666148923] [2023-12-15 22:02:00,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666148923] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:02:00,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465791698] [2023-12-15 22:02:00,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 22:02:00,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:02:00,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:02:00,289 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) [2023-12-15 22:02:00,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-15 22:02:00,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 22:02:00,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:02:00,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-15 22:02:00,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:02:01,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1056 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 22:02:01,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:02:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1056 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 22:02:01,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465791698] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:02:01,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:02:01,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 74 [2023-12-15 22:02:01,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901936593] [2023-12-15 22:02:01,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:02:01,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-12-15 22:02:01,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:02:01,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-12-15 22:02:01,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=4174, Unknown=0, NotChecked=0, Total=5402 [2023-12-15 22:02:01,951 INFO L87 Difference]: Start difference. First operand 148 states and 151 transitions. Second operand has 74 states, 74 states have (on average 3.3378378378378377) internal successors, (247), 74 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:02:02,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:02:02,563 INFO L93 Difference]: Finished difference Result 339 states and 389 transitions. [2023-12-15 22:02:02,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-15 22:02:02,563 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.3378378378378377) internal successors, (247), 74 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2023-12-15 22:02:02,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:02:02,564 INFO L225 Difference]: With dead ends: 339 [2023-12-15 22:02:02,564 INFO L226 Difference]: Without dead ends: 242 [2023-12-15 22:02:02,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 225 SyntacticMatches, 44 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3471 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2334, Invalid=6978, Unknown=0, NotChecked=0, Total=9312 [2023-12-15 22:02:02,566 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 338 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 22:02:02,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 475 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 22:02:02,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-12-15 22:02:02,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 150. [2023-12-15 22:02:02,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0268456375838926) internal successors, (153), 149 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:02:02,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2023-12-15 22:02:02,576 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 147 [2023-12-15 22:02:02,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:02:02,576 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2023-12-15 22:02:02,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.3378378378378377) internal successors, (247), 74 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:02:02,576 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2023-12-15 22:02:02,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-12-15 22:02:02,576 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:02:02,576 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:02:02,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-15 22:02:02,780 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 [2023-12-15 22:02:02,780 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:02:02,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:02:02,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1636862430, now seen corresponding path program 27 times [2023-12-15 22:02:02,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:02:02,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534163143] [2023-12-15 22:02:02,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:02:02,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:02:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:02:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 992 proven. 618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:02:03,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:02:03,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534163143] [2023-12-15 22:02:03,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534163143] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:02:03,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504868246] [2023-12-15 22:02:03,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 22:02:03,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:02:03,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:02:03,717 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) [2023-12-15 22:02:03,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-15 22:02:03,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-12-15 22:02:03,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:02:03,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-15 22:02:03,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:02:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 1058 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:02:04,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:02:05,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 1058 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:02:05,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504868246] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:02:05,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:02:05,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 76 [2023-12-15 22:02:05,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786201013] [2023-12-15 22:02:05,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:02:05,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-12-15 22:02:05,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:02:05,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-12-15 22:02:05,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1303, Invalid=4397, Unknown=0, NotChecked=0, Total=5700 [2023-12-15 22:02:05,521 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand has 76 states, 76 states have (on average 3.276315789473684) internal successors, (249), 76 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:02:06,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:02:06,159 INFO L93 Difference]: Finished difference Result 347 states and 399 transitions. [2023-12-15 22:02:06,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-15 22:02:06,159 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.276315789473684) internal successors, (249), 76 states have internal predecessors, (249), 0 states have call successors, (0), 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 149 [2023-12-15 22:02:06,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:02:06,160 INFO L225 Difference]: With dead ends: 347 [2023-12-15 22:02:06,160 INFO L226 Difference]: Without dead ends: 248 [2023-12-15 22:02:06,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 226 SyntacticMatches, 46 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3672 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2505, Invalid=7395, Unknown=0, NotChecked=0, Total=9900 [2023-12-15 22:02:06,162 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 336 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 22:02:06,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 623 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 22:02:06,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-12-15 22:02:06,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 152. [2023-12-15 22:02:06,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0264900662251655) internal successors, (155), 151 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:02:06,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2023-12-15 22:02:06,169 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 149 [2023-12-15 22:02:06,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:02:06,169 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2023-12-15 22:02:06,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.276315789473684) internal successors, (249), 76 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:02:06,169 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2023-12-15 22:02:06,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-12-15 22:02:06,170 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:02:06,170 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:02:06,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-15 22:02:06,377 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 [2023-12-15 22:02:06,377 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:02:06,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:02:06,377 INFO L85 PathProgramCache]: Analyzing trace with hash 2012404871, now seen corresponding path program 28 times [2023-12-15 22:02:06,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:02:06,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620680456] [2023-12-15 22:02:06,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:02:06,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:02:06,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:02:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 552 proven. 1106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:02:06,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:02:06,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620680456] [2023-12-15 22:02:06,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620680456] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:02:06,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750121032] [2023-12-15 22:02:06,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 22:02:06,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:02:06,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:02:06,998 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) [2023-12-15 22:02:06,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-15 22:02:07,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 22:02:07,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:02:07,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-15 22:02:07,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:02:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 600 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:02:07,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:02:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 600 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:02:07,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750121032] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:02:07,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:02:07,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 30 [2023-12-15 22:02:07,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686612517] [2023-12-15 22:02:07,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:02:07,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-15 22:02:07,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:02:07,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-15 22:02:07,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=543, Unknown=0, NotChecked=0, Total=930 [2023-12-15 22:02:07,702 INFO L87 Difference]: Start difference. First operand 152 states and 155 transitions. Second operand has 31 states, 31 states have (on average 5.612903225806452) internal successors, (174), 30 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:02:08,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:02:08,033 INFO L93 Difference]: Finished difference Result 169 states and 173 transitions. [2023-12-15 22:02:08,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-12-15 22:02:08,034 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.612903225806452) internal successors, (174), 30 states have internal predecessors, (174), 0 states have call successors, (0), 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 151 [2023-12-15 22:02:08,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:02:08,034 INFO L225 Difference]: With dead ends: 169 [2023-12-15 22:02:08,034 INFO L226 Difference]: Without dead ends: 167 [2023-12-15 22:02:08,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 274 SyntacticMatches, 47 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1166, Invalid=2026, Unknown=0, NotChecked=0, Total=3192 [2023-12-15 22:02:08,035 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 65 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:02:08,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 215 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:02:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-12-15 22:02:08,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2023-12-15 22:02:08,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0251572327044025) internal successors, (163), 159 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) [2023-12-15 22:02:08,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 163 transitions. [2023-12-15 22:02:08,041 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 163 transitions. Word has length 151 [2023-12-15 22:02:08,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:02:08,042 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 163 transitions. [2023-12-15 22:02:08,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.612903225806452) internal successors, (174), 30 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:02:08,042 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 163 transitions. [2023-12-15 22:02:08,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-12-15 22:02:08,042 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:02:08,042 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:02:08,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-12-15 22:02:08,247 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 [2023-12-15 22:02:08,247 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:02:08,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:02:08,247 INFO L85 PathProgramCache]: Analyzing trace with hash 255440749, now seen corresponding path program 29 times [2023-12-15 22:02:08,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:02:08,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268580808] [2023-12-15 22:02:08,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:02:08,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:02:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:02:09,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 1178 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:02:09,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:02:09,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268580808] [2023-12-15 22:02:09,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268580808] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:02:09,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107057049] [2023-12-15 22:02:09,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 22:02:09,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:02:09,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:02:09,332 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) [2023-12-15 22:02:09,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-15 22:02:09,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2023-12-15 22:02:09,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:02:09,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-15 22:02:09,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:02:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 1250 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:02:10,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:02:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 1250 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:02:11,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107057049] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:02:11,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:02:11,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 83 [2023-12-15 22:02:11,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876340311] [2023-12-15 22:02:11,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:02:11,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-12-15 22:02:11,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:02:11,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-12-15 22:02:11,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1570, Invalid=5236, Unknown=0, NotChecked=0, Total=6806 [2023-12-15 22:02:11,293 INFO L87 Difference]: Start difference. First operand 160 states and 163 transitions. Second operand has 83 states, 83 states have (on average 3.325301204819277) internal successors, (276), 83 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:02:12,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:02:12,505 INFO L93 Difference]: Finished difference Result 474 states and 531 transitions. [2023-12-15 22:02:12,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-12-15 22:02:12,505 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.325301204819277) internal successors, (276), 83 states have internal predecessors, (276), 0 states have call successors, (0), 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 159 [2023-12-15 22:02:12,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:02:12,506 INFO L225 Difference]: With dead ends: 474 [2023-12-15 22:02:12,506 INFO L226 Difference]: Without dead ends: 268 [2023-12-15 22:02:12,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 241 SyntacticMatches, 47 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5905 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4351, Invalid=13471, Unknown=0, NotChecked=0, Total=17822 [2023-12-15 22:02:12,508 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 435 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-15 22:02:12,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 812 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-15 22:02:12,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2023-12-15 22:02:12,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 164. [2023-12-15 22:02:12,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.0245398773006136) internal successors, (167), 163 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:02:12,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 167 transitions. [2023-12-15 22:02:12,516 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 167 transitions. Word has length 159 [2023-12-15 22:02:12,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:02:12,516 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 167 transitions. [2023-12-15 22:02:12,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.325301204819277) internal successors, (276), 83 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:02:12,516 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 167 transitions. [2023-12-15 22:02:12,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-12-15 22:02:12,517 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:02:12,517 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:02:12,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-12-15 22:02:12,722 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 [2023-12-15 22:02:12,723 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:02:12,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:02:12,723 INFO L85 PathProgramCache]: Analyzing trace with hash -105112969, now seen corresponding path program 30 times [2023-12-15 22:02:12,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:02:12,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796392653] [2023-12-15 22:02:12,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:02:12,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:02:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:02:13,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 650 proven. 1302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:02:13,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:02:13,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796392653] [2023-12-15 22:02:13,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796392653] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:02:13,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852431993] [2023-12-15 22:02:13,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-15 22:02:13,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:02:13,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:02:13,433 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) [2023-12-15 22:02:13,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-15 22:02:13,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2023-12-15 22:02:13,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:02:13,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 58 conjunts are in the unsatisfiable core [2023-12-15 22:02:13,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:02:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 702 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:02:13,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:02:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 702 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:02:14,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852431993] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:02:14,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:02:14,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 32 [2023-12-15 22:02:14,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671330166] [2023-12-15 22:02:14,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:02:14,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-15 22:02:14,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:02:14,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-15 22:02:14,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=612, Unknown=0, NotChecked=0, Total=1056 [2023-12-15 22:02:14,268 INFO L87 Difference]: Start difference. First operand 164 states and 167 transitions. Second operand has 33 states, 33 states have (on average 5.636363636363637) internal successors, (186), 32 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:02:14,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:02:14,598 INFO L93 Difference]: Finished difference Result 181 states and 185 transitions. [2023-12-15 22:02:14,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-12-15 22:02:14,598 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.636363636363637) internal successors, (186), 32 states have internal predecessors, (186), 0 states have call successors, (0), 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 163 [2023-12-15 22:02:14,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:02:14,599 INFO L225 Difference]: With dead ends: 181 [2023-12-15 22:02:14,599 INFO L226 Difference]: Without dead ends: 179 [2023-12-15 22:02:14,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 296 SyntacticMatches, 51 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1339, Invalid=2321, Unknown=0, NotChecked=0, Total=3660 [2023-12-15 22:02:14,601 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 38 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:02:14,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 283 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:02:14,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-12-15 22:02:14,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 172. [2023-12-15 22:02:14,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.023391812865497) internal successors, (175), 171 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:02:14,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 175 transitions. [2023-12-15 22:02:14,608 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 175 transitions. Word has length 163 [2023-12-15 22:02:14,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:02:14,609 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 175 transitions. [2023-12-15 22:02:14,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.636363636363637) internal successors, (186), 32 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:02:14,609 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 175 transitions. [2023-12-15 22:02:14,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-12-15 22:02:14,609 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:02:14,609 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:02:14,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-12-15 22:02:14,814 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 [2023-12-15 22:02:14,815 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:02:14,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:02:14,815 INFO L85 PathProgramCache]: Analyzing trace with hash 111019357, now seen corresponding path program 31 times [2023-12-15 22:02:14,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:02:14,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506228562] [2023-12-15 22:02:14,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:02:14,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:02:14,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:02:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1380 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:02:16,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:02:16,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506228562] [2023-12-15 22:02:16,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506228562] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:02:16,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889224081] [2023-12-15 22:02:16,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-15 22:02:16,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:02:16,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:02:16,012 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) [2023-12-15 22:02:16,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-15 22:02:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:02:16,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-15 22:02:16,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:02:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1456 proven. 702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 22:02:17,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:02:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1456 proven. 702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 22:02:18,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889224081] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:02:18,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:02:18,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 86 [2023-12-15 22:02:18,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825541028] [2023-12-15 22:02:18,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:02:18,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-12-15 22:02:18,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:02:18,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-12-15 22:02:18,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1656, Invalid=5654, Unknown=0, NotChecked=0, Total=7310 [2023-12-15 22:02:18,127 INFO L87 Difference]: Start difference. First operand 172 states and 175 transitions. Second operand has 86 states, 86 states have (on average 3.3372093023255816) internal successors, (287), 86 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:02:18,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:02:18,867 INFO L93 Difference]: Finished difference Result 395 states and 453 transitions. [2023-12-15 22:02:18,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-12-15 22:02:18,867 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.3372093023255816) internal successors, (287), 86 states have internal predecessors, (287), 0 states have call successors, (0), 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 171 [2023-12-15 22:02:18,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:02:18,868 INFO L225 Difference]: With dead ends: 395 [2023-12-15 22:02:18,868 INFO L226 Difference]: Without dead ends: 282 [2023-12-15 22:02:18,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 261 SyntacticMatches, 52 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4727 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3170, Invalid=9486, Unknown=0, NotChecked=0, Total=12656 [2023-12-15 22:02:18,869 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 341 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 22:02:18,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 556 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 22:02:18,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-12-15 22:02:18,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 174. [2023-12-15 22:02:18,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.023121387283237) internal successors, (177), 173 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:02:18,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 177 transitions. [2023-12-15 22:02:18,877 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 177 transitions. Word has length 171 [2023-12-15 22:02:18,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:02:18,877 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 177 transitions. [2023-12-15 22:02:18,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.3372093023255816) internal successors, (287), 86 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:02:18,877 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 177 transitions. [2023-12-15 22:02:18,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-12-15 22:02:18,878 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:02:18,878 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:02:18,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-12-15 22:02:19,080 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 [2023-12-15 22:02:19,080 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:02:19,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:02:19,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1803394558, now seen corresponding path program 32 times [2023-12-15 22:02:19,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:02:19,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674509405] [2023-12-15 22:02:19,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:02:19,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:02:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:02:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 1380 proven. 834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:02:20,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:02:20,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674509405] [2023-12-15 22:02:20,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674509405] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:02:20,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118462713] [2023-12-15 22:02:20,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 22:02:20,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:02:20,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:02:20,332 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) [2023-12-15 22:02:20,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-15 22:02:20,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 22:02:20,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:02:20,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 58 conjunts are in the unsatisfiable core [2023-12-15 22:02:20,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:02:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 1458 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:02:21,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:02:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 1458 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:02:22,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118462713] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:02:22,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:02:22,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 88 [2023-12-15 22:02:22,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622273375] [2023-12-15 22:02:22,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:02:22,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2023-12-15 22:02:22,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:02:22,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2023-12-15 22:02:22,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1743, Invalid=5913, Unknown=0, NotChecked=0, Total=7656 [2023-12-15 22:02:22,551 INFO L87 Difference]: Start difference. First operand 174 states and 177 transitions. Second operand has 88 states, 88 states have (on average 3.284090909090909) internal successors, (289), 88 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:02:23,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:02:23,322 INFO L93 Difference]: Finished difference Result 403 states and 463 transitions. [2023-12-15 22:02:23,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-12-15 22:02:23,322 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.284090909090909) internal successors, (289), 88 states have internal predecessors, (289), 0 states have call successors, (0), 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 173 [2023-12-15 22:02:23,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:02:23,324 INFO L225 Difference]: With dead ends: 403 [2023-12-15 22:02:23,324 INFO L226 Difference]: Without dead ends: 288 [2023-12-15 22:02:23,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 262 SyntacticMatches, 54 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4960 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3369, Invalid=9971, Unknown=0, NotChecked=0, Total=13340 [2023-12-15 22:02:23,326 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 380 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 22:02:23,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 572 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 22:02:23,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-12-15 22:02:23,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 176. [2023-12-15 22:02:23,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.022857142857143) internal successors, (179), 175 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:02:23,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 179 transitions. [2023-12-15 22:02:23,347 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 179 transitions. Word has length 173 [2023-12-15 22:02:23,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:02:23,347 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 179 transitions. [2023-12-15 22:02:23,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.284090909090909) internal successors, (289), 88 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:02:23,347 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 179 transitions. [2023-12-15 22:02:23,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-12-15 22:02:23,348 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:02:23,348 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:02:23,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-12-15 22:02:23,553 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 [2023-12-15 22:02:23,554 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:02:23,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:02:23,554 INFO L85 PathProgramCache]: Analyzing trace with hash 985803111, now seen corresponding path program 33 times [2023-12-15 22:02:23,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:02:23,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765307217] [2023-12-15 22:02:23,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:02:23,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:02:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:02:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 756 proven. 1514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:02:24,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:02:24,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765307217] [2023-12-15 22:02:24,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765307217] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:02:24,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671495725] [2023-12-15 22:02:24,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 22:02:24,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:02:24,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:02:24,341 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) [2023-12-15 22:02:24,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-15 22:02:24,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2023-12-15 22:02:24,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:02:24,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-15 22:02:24,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:02:24,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 812 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:02:24,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:02:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 812 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:02:25,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671495725] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:02:25,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:02:25,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 34 [2023-12-15 22:02:25,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022503989] [2023-12-15 22:02:25,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:02:25,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-15 22:02:25,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:02:25,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-15 22:02:25,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=685, Unknown=0, NotChecked=0, Total=1190 [2023-12-15 22:02:25,245 INFO L87 Difference]: Start difference. First operand 176 states and 179 transitions. Second operand has 35 states, 35 states have (on average 5.6571428571428575) internal successors, (198), 34 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:02:25,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:02:25,643 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2023-12-15 22:02:25,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-12-15 22:02:25,643 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.6571428571428575) internal successors, (198), 34 states have internal predecessors, (198), 0 states have call successors, (0), 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 175 [2023-12-15 22:02:25,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:02:25,644 INFO L225 Difference]: With dead ends: 193 [2023-12-15 22:02:25,644 INFO L226 Difference]: Without dead ends: 191 [2023-12-15 22:02:25,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 318 SyntacticMatches, 55 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1524, Invalid=2636, Unknown=0, NotChecked=0, Total=4160 [2023-12-15 22:02:25,645 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 38 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:02:25,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 321 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:02:25,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-12-15 22:02:25,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 184. [2023-12-15 22:02:25,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.0218579234972678) internal successors, (187), 183 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:02:25,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 187 transitions. [2023-12-15 22:02:25,655 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 187 transitions. Word has length 175 [2023-12-15 22:02:25,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:02:25,655 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 187 transitions. [2023-12-15 22:02:25,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.6571428571428575) internal successors, (198), 34 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:02:25,656 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 187 transitions. [2023-12-15 22:02:25,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-12-15 22:02:25,656 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:02:25,656 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:02:25,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-12-15 22:02:25,861 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 [2023-12-15 22:02:25,861 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:02:25,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:02:25,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1612831667, now seen corresponding path program 34 times [2023-12-15 22:02:25,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:02:25,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914680387] [2023-12-15 22:02:25,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:02:25,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:02:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:02:27,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 1598 proven. 896 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:02:27,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:02:27,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914680387] [2023-12-15 22:02:27,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914680387] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:02:27,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545747181] [2023-12-15 22:02:27,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 22:02:27,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:02:27,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:02:27,227 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) [2023-12-15 22:02:27,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-15 22:02:27,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 22:02:27,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:02:27,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 61 conjunts are in the unsatisfiable core [2023-12-15 22:02:27,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:02:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 1682 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:02:28,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:02:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 1682 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:02:29,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545747181] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:02:29,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:02:29,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 95 [2023-12-15 22:02:29,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737982258] [2023-12-15 22:02:29,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:02:29,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2023-12-15 22:02:29,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:02:29,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2023-12-15 22:02:29,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2050, Invalid=6880, Unknown=0, NotChecked=0, Total=8930 [2023-12-15 22:02:29,728 INFO L87 Difference]: Start difference. First operand 184 states and 187 transitions. Second operand has 95 states, 95 states have (on average 3.3263157894736843) internal successors, (316), 95 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2023-12-15 22:02:30,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-12-15 22:02:30,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 277 SyntacticMatches, 55 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5264 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2173, Invalid=8539, Unknown=0, NotChecked=0, Total=10712 [2023-12-15 22:02:30,202 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 397 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 22:02:30,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 175 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 22:02:30,203 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 22:02:30,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-12-15 22:02:30,232 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 22:02:30,247 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 22:02:30,403 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 [2023-12-15 22:02:30,403 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (184states) and FLOYD_HOARE automaton (currently 41 states, 95 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 104 known predicates. [2023-12-15 22:02:30,407 INFO L445 BasicCegarLoop]: Path program histogram: [34, 1, 1, 1] [2023-12-15 22:02:30,408 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 22:02:30,409 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 10:02:30 BoogieIcfgContainer [2023-12-15 22:02:30,409 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 22:02:30,410 INFO L158 Benchmark]: Toolchain (without parser) took 66669.66ms. Allocated memory was 284.2MB in the beginning and 493.9MB in the end (delta: 209.7MB). Free memory was 243.9MB in the beginning and 203.9MB in the end (delta: 40.0MB). Peak memory consumption was 250.5MB. Max. memory is 8.0GB. [2023-12-15 22:02:30,410 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 208.7MB. Free memory is still 157.2MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 22:02:30,410 INFO L158 Benchmark]: CACSL2BoogieTranslator took 176.88ms. Allocated memory is still 284.2MB. Free memory was 243.9MB in the beginning and 232.6MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-15 22:02:30,410 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.08ms. Allocated memory is still 284.2MB. Free memory was 232.6MB in the beginning and 231.5MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-15 22:02:30,410 INFO L158 Benchmark]: Boogie Preprocessor took 20.52ms. Allocated memory is still 284.2MB. Free memory was 231.5MB in the beginning and 229.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 22:02:30,410 INFO L158 Benchmark]: RCFGBuilder took 201.18ms. Allocated memory is still 284.2MB. Free memory was 229.5MB in the beginning and 219.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-15 22:02:30,410 INFO L158 Benchmark]: TraceAbstraction took 66247.24ms. Allocated memory was 284.2MB in the beginning and 493.9MB in the end (delta: 209.7MB). Free memory was 218.5MB in the beginning and 203.9MB in the end (delta: 14.5MB). Peak memory consumption was 225.3MB. Max. memory is 8.0GB. [2023-12-15 22:02:30,411 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 208.7MB. Free memory is still 157.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 176.88ms. Allocated memory is still 284.2MB. Free memory was 243.9MB in the beginning and 232.6MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 20.08ms. Allocated memory is still 284.2MB. Free memory was 232.6MB in the beginning and 231.5MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.52ms. Allocated memory is still 284.2MB. Free memory was 231.5MB in the beginning and 229.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 201.18ms. Allocated memory is still 284.2MB. Free memory was 229.5MB in the beginning and 219.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 66247.24ms. Allocated memory was 284.2MB in the beginning and 493.9MB in the end (delta: 209.7MB). Free memory was 218.5MB in the beginning and 203.9MB in the end (delta: 14.5MB). Peak memory consumption was 225.3MB. 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: 19]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 19). Cancelled while NwaCegarLoop was constructing difference of abstraction (184states) and FLOYD_HOARE automaton (currently 41 states, 95 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 104 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 66.2s, OverallIterations: 37, TraceHistogramMax: 30, PathProgramHistogramMax: 34, EmptinessCheckTime: 0.0s, AutomataDifference: 12.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5299 SdHoareTripleChecker+Valid, 5.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5299 mSDsluCounter, 9348 SdHoareTripleChecker+Invalid, 4.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8292 mSDsCounter, 1373 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10588 IncrementalHoareTripleChecker+Invalid, 11961 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1373 mSolverCounterUnsat, 1056 mSDtfsCounter, 10588 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8609 GetRequests, 5618 SyntacticMatches, 996 SemanticMatches, 1994 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59184 ImplicationChecksByTransitivity, 32.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=184occurred in iteration=36, InterpolantAutomatonStates: 1297, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 36 MinimizatonAttempts, 1298 StatesRemovedByMinimization, 35 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 42.6s InterpolantComputationTime, 6891 NumberOfCodeBlocks, 6891 NumberOfCodeBlocksAsserted, 331 NumberOfCheckSat, 10214 ConstructedInterpolants, 0 QuantifiedInterpolants, 39671 SizeOfPredicates, 89 NumberOfNonLiveVariables, 12728 ConjunctsInSsa, 1188 ConjunctsInUnsatCore, 105 InterpolantComputations, 3 PerfectInterpolantSequences, 49078/90704 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