/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 06:34:03,431 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 06:34:03,467 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 06:34:03,470 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 06:34:03,470 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 06:34:03,484 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 06:34:03,484 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 06:34:03,484 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 06:34:03,485 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 06:34:03,485 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 06:34:03,485 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 06:34:03,486 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 06:34:03,486 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 06:34:03,486 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 06:34:03,486 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 06:34:03,487 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 06:34:03,488 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 06:34:03,490 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 06:34:03,490 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 06:34:03,490 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 06:34:03,491 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 06:34:03,491 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 06:34:03,492 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 06:34:03,492 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 06:34:03,492 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 06:34:03,492 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 06:34:03,492 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 06:34:03,492 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 06:34:03,493 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 06:34:03,493 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 06:34:03,493 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 06:34:03,493 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 06:34:03,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 06:34:03,493 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 06:34:03,494 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 06:34:03,494 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 06:34:03,494 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 06:34:03,494 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 06:34:03,494 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 06:34:03,494 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 06:34:03,494 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 06:34:03,494 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 06:34:03,495 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 06:34:03,495 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 06:34:03,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 06:34:03,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 06:34:03,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 06:34:03,662 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 06:34:03,662 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 06:34:03,663 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c [2023-12-21 06:34:04,653 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 06:34:04,793 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 06:34:04,794 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c [2023-12-21 06:34:04,800 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8098b4801/7b68395e41904bbf91909930b2376da4/FLAG04c9fc0cd [2023-12-21 06:34:04,811 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8098b4801/7b68395e41904bbf91909930b2376da4 [2023-12-21 06:34:04,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 06:34:04,815 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 06:34:04,817 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 06:34:04,818 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 06:34:04,821 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 06:34:04,821 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:34:04" (1/1) ... [2023-12-21 06:34:04,822 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c3be58e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:34:04, skipping insertion in model container [2023-12-21 06:34:04,822 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:34:04" (1/1) ... [2023-12-21 06:34:04,839 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 06:34:04,953 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2023-12-21 06:34:04,982 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 06:34:04,992 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 06:34:05,001 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2023-12-21 06:34:05,021 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 06:34:05,030 INFO L206 MainTranslator]: Completed translation [2023-12-21 06:34:05,030 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:34:05 WrapperNode [2023-12-21 06:34:05,030 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 06:34:05,031 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 06:34:05,031 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 06:34:05,031 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 06:34:05,041 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:34:05" (1/1) ... [2023-12-21 06:34:05,053 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:34:05" (1/1) ... [2023-12-21 06:34:05,070 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 83 [2023-12-21 06:34:05,071 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 06:34:05,071 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 06:34:05,072 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 06:34:05,072 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 06:34:05,079 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:34:05" (1/1) ... [2023-12-21 06:34:05,079 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:34:05" (1/1) ... [2023-12-21 06:34:05,086 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:34:05" (1/1) ... [2023-12-21 06:34:05,101 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-21 06:34:05,102 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:34:05" (1/1) ... [2023-12-21 06:34:05,102 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:34:05" (1/1) ... [2023-12-21 06:34:05,108 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:34:05" (1/1) ... [2023-12-21 06:34:05,110 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:34:05" (1/1) ... [2023-12-21 06:34:05,112 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:34:05" (1/1) ... [2023-12-21 06:34:05,114 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:34:05" (1/1) ... [2023-12-21 06:34:05,115 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 06:34:05,116 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 06:34:05,116 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 06:34:05,116 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 06:34:05,117 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:34:05" (1/1) ... [2023-12-21 06:34:05,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 06:34:05,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:34:05,139 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-21 06:34:05,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-21 06:34:05,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 06:34:05,166 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-21 06:34:05,167 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-21 06:34:05,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 06:34:05,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 06:34:05,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 06:34:05,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-21 06:34:05,168 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-21 06:34:05,214 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 06:34:05,215 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 06:34:05,340 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 06:34:05,355 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 06:34:05,355 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-21 06:34:05,355 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:34:05 BoogieIcfgContainer [2023-12-21 06:34:05,355 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 06:34:05,356 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 06:34:05,357 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 06:34:05,358 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 06:34:05,359 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 06:34:04" (1/3) ... [2023-12-21 06:34:05,359 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aabd9fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:34:05, skipping insertion in model container [2023-12-21 06:34:05,359 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:34:05" (2/3) ... [2023-12-21 06:34:05,359 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aabd9fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:34:05, skipping insertion in model container [2023-12-21 06:34:05,359 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:34:05" (3/3) ... [2023-12-21 06:34:05,360 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound100.c [2023-12-21 06:34:05,371 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 06:34:05,371 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 06:34:05,410 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 06:34:05,416 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;@4fdb08ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 06:34:05,416 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 06:34:05,419 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-21 06:34:05,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-21 06:34:05,425 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:34:05,425 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:34:05,426 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:34:05,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:34:05,429 INFO L85 PathProgramCache]: Analyzing trace with hash 67099435, now seen corresponding path program 1 times [2023-12-21 06:34:05,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:34:05,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163324617] [2023-12-21 06:34:05,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:05,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:34:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:34:05,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:34:05,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163324617] [2023-12-21 06:34:05,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-21 06:34:05,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826453630] [2023-12-21 06:34:05,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:05,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:34:05,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:34:05,563 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:34:05,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 06:34:05,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:34:05,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-21 06:34:05,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:34:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 06:34:05,676 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 06:34:05,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826453630] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 06:34:05,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 06:34:05,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 06:34:05,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828590711] [2023-12-21 06:34:05,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 06:34:05,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-21 06:34:05,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:34:05,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-21 06:34:05,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 06:34:05,702 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 06:34:05,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:34:05,729 INFO L93 Difference]: Finished difference Result 62 states and 104 transitions. [2023-12-21 06:34:05,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-21 06:34:05,731 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-12-21 06:34:05,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:34:05,735 INFO L225 Difference]: With dead ends: 62 [2023-12-21 06:34:05,735 INFO L226 Difference]: Without dead ends: 30 [2023-12-21 06:34:05,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 06:34:05,742 INFO L413 NwaCegarLoop]: 39 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, 39 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 06:34:05,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 06:34:05,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-21 06:34:05,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-12-21 06:34:05,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 06:34:05,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-12-21 06:34:05,777 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 28 [2023-12-21 06:34:05,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:34:05,777 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-12-21 06:34:05,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 06:34:05,777 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-12-21 06:34:05,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-21 06:34:05,779 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:34:05,780 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:34:05,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-21 06:34:05,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-21 06:34:05,986 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:34:05,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:34:05,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1772608446, now seen corresponding path program 1 times [2023-12-21 06:34:05,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:34:05,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399890244] [2023-12-21 06:34:05,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:05,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:34:06,003 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:34:06,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215997798] [2023-12-21 06:34:06,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:06,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:34:06,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:34:06,008 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:34:06,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 06:34:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:34:06,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-21 06:34:06,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:34:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 06:34:06,147 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 06:34:06,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:34:06,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399890244] [2023-12-21 06:34:06,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:34:06,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215997798] [2023-12-21 06:34:06,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215997798] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 06:34:06,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 06:34:06,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 06:34:06,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366955644] [2023-12-21 06:34:06,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 06:34:06,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 06:34:06,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:34:06,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 06:34:06,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-21 06:34:06,150 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-21 06:34:06,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:34:06,252 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2023-12-21 06:34:06,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 06:34:06,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2023-12-21 06:34:06,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:34:06,264 INFO L225 Difference]: With dead ends: 49 [2023-12-21 06:34:06,264 INFO L226 Difference]: Without dead ends: 42 [2023-12-21 06:34:06,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-21 06:34:06,265 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 06:34:06,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 115 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 06:34:06,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-12-21 06:34:06,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2023-12-21 06:34:06,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 06:34:06,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2023-12-21 06:34:06,278 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 29 [2023-12-21 06:34:06,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:34:06,279 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2023-12-21 06:34:06,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-21 06:34:06,279 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2023-12-21 06:34:06,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-21 06:34:06,280 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:34:06,280 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:34:06,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-21 06:34:06,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-21 06:34:06,485 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:34:06,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:34:06,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1072684582, now seen corresponding path program 1 times [2023-12-21 06:34:06,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:34:06,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286046181] [2023-12-21 06:34:06,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:06,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:34:06,498 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:34:06,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582608363] [2023-12-21 06:34:06,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:06,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:34:06,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:34:06,500 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:34:06,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-21 06:34:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:34:06,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-21 06:34:06,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:34:06,657 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 06:34:06,657 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 06:34:06,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:34:06,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286046181] [2023-12-21 06:34:06,658 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:34:06,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582608363] [2023-12-21 06:34:06,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582608363] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 06:34:06,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 06:34:06,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-21 06:34:06,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524561337] [2023-12-21 06:34:06,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 06:34:06,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 06:34:06,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:34:06,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 06:34:06,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-21 06:34:06,661 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-21 06:34:06,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:34:06,753 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2023-12-21 06:34:06,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 06:34:06,753 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2023-12-21 06:34:06,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:34:06,754 INFO L225 Difference]: With dead ends: 48 [2023-12-21 06:34:06,754 INFO L226 Difference]: Without dead ends: 46 [2023-12-21 06:34:06,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-12-21 06:34:06,755 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 06:34:06,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 141 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 06:34:06,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-21 06:34:06,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2023-12-21 06:34:06,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-21 06:34:06,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2023-12-21 06:34:06,762 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 32 [2023-12-21 06:34:06,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:34:06,762 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2023-12-21 06:34:06,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-21 06:34:06,763 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2023-12-21 06:34:06,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-21 06:34:06,763 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:34:06,763 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:34:06,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-21 06:34:06,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:34:06,970 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:34:06,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:34:06,970 INFO L85 PathProgramCache]: Analyzing trace with hash 581538888, now seen corresponding path program 1 times [2023-12-21 06:34:06,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:34:06,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970294640] [2023-12-21 06:34:06,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:06,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:34:06,982 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:34:06,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936188374] [2023-12-21 06:34:06,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:06,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:34:06,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:34:06,984 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:34:06,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-21 06:34:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:34:07,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-21 06:34:07,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:34:07,074 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 06:34:07,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:34:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 06:34:07,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:34:07,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970294640] [2023-12-21 06:34:07,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:34:07,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936188374] [2023-12-21 06:34:07,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936188374] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:34:07,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:34:07,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-12-21 06:34:07,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194433281] [2023-12-21 06:34:07,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:34:07,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-21 06:34:07,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:34:07,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-21 06:34:07,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-12-21 06:34:07,134 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 06:34:07,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:34:07,245 INFO L93 Difference]: Finished difference Result 98 states and 138 transitions. [2023-12-21 06:34:07,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 06:34:07,246 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2023-12-21 06:34:07,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:34:07,247 INFO L225 Difference]: With dead ends: 98 [2023-12-21 06:34:07,247 INFO L226 Difference]: Without dead ends: 91 [2023-12-21 06:34:07,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-12-21 06:34:07,248 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 62 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 06:34:07,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 222 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 06:34:07,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-21 06:34:07,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2023-12-21 06:34:07,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 46 states have internal predecessors, (57), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-12-21 06:34:07,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 90 transitions. [2023-12-21 06:34:07,258 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 90 transitions. Word has length 34 [2023-12-21 06:34:07,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:34:07,258 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 90 transitions. [2023-12-21 06:34:07,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 06:34:07,259 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 90 transitions. [2023-12-21 06:34:07,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-21 06:34:07,259 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:34:07,259 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:34:07,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-21 06:34:07,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:34:07,464 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:34:07,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:34:07,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1534715754, now seen corresponding path program 1 times [2023-12-21 06:34:07,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:34:07,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878130146] [2023-12-21 06:34:07,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:07,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:34:07,478 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:34:07,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158282581] [2023-12-21 06:34:07,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:07,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:34:07,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:34:07,489 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:34:07,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-21 06:34:07,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:34:07,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-21 06:34:07,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:34:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 06:34:07,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:34:07,774 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-21 06:34:07,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:34:07,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878130146] [2023-12-21 06:34:07,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:34:07,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158282581] [2023-12-21 06:34:07,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158282581] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 06:34:07,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 06:34:07,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-12-21 06:34:07,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388639852] [2023-12-21 06:34:07,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 06:34:07,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 06:34:07,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:34:07,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 06:34:07,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-12-21 06:34:07,777 INFO L87 Difference]: Start difference. First operand 66 states and 90 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 06:34:07,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:34:07,814 INFO L93 Difference]: Finished difference Result 74 states and 97 transitions. [2023-12-21 06:34:07,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 06:34:07,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2023-12-21 06:34:07,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:34:07,815 INFO L225 Difference]: With dead ends: 74 [2023-12-21 06:34:07,815 INFO L226 Difference]: Without dead ends: 72 [2023-12-21 06:34:07,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-12-21 06:34:07,816 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 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 [2023-12-21 06:34:07,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 06:34:07,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-21 06:34:07,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2023-12-21 06:34:07,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 48 states have (on average 1.25) internal successors, (60), 49 states have internal predecessors, (60), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-12-21 06:34:07,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 93 transitions. [2023-12-21 06:34:07,826 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 93 transitions. Word has length 37 [2023-12-21 06:34:07,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:34:07,827 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 93 transitions. [2023-12-21 06:34:07,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 06:34:07,827 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 93 transitions. [2023-12-21 06:34:07,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-21 06:34:07,827 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:34:07,827 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:34:07,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-21 06:34:08,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:34:08,032 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:34:08,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:34:08,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1190433772, now seen corresponding path program 1 times [2023-12-21 06:34:08,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:34:08,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168537799] [2023-12-21 06:34:08,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:08,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:34:08,042 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:34:08,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [34735987] [2023-12-21 06:34:08,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:08,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:34:08,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:34:08,056 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:34:08,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-21 06:34:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:34:08,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-21 06:34:08,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:34:08,237 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 06:34:08,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:34:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-21 06:34:08,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:34:08,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168537799] [2023-12-21 06:34:08,304 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:34:08,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34735987] [2023-12-21 06:34:08,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34735987] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:34:08,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:34:08,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2023-12-21 06:34:08,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684357793] [2023-12-21 06:34:08,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:34:08,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-21 06:34:08,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:34:08,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-21 06:34:08,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-12-21 06:34:08,305 INFO L87 Difference]: Start difference. First operand 70 states and 93 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 06:34:08,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:34:08,501 INFO L93 Difference]: Finished difference Result 113 states and 154 transitions. [2023-12-21 06:34:08,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 06:34:08,502 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2023-12-21 06:34:08,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:34:08,503 INFO L225 Difference]: With dead ends: 113 [2023-12-21 06:34:08,503 INFO L226 Difference]: Without dead ends: 111 [2023-12-21 06:34:08,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-12-21 06:34:08,504 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 67 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 06:34:08,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 297 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 06:34:08,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-12-21 06:34:08,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2023-12-21 06:34:08,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 70 states have internal predecessors, (87), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-12-21 06:34:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 136 transitions. [2023-12-21 06:34:08,521 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 136 transitions. Word has length 37 [2023-12-21 06:34:08,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:34:08,522 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 136 transitions. [2023-12-21 06:34:08,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 06:34:08,522 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 136 transitions. [2023-12-21 06:34:08,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-21 06:34:08,523 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:34:08,523 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:34:08,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-21 06:34:08,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:34:08,728 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:34:08,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:34:08,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1246105370, now seen corresponding path program 1 times [2023-12-21 06:34:08,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:34:08,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260134217] [2023-12-21 06:34:08,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:08,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:34:08,737 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:34:08,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643557216] [2023-12-21 06:34:08,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:08,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:34:08,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:34:08,740 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:34:08,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-21 06:34:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:34:08,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-21 06:34:08,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:34:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-21 06:34:09,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:34:10,810 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-21 06:34:10,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:34:10,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260134217] [2023-12-21 06:34:10,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:34:10,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643557216] [2023-12-21 06:34:10,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643557216] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 06:34:10,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 06:34:10,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 14 [2023-12-21 06:34:10,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692552193] [2023-12-21 06:34:10,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 06:34:10,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 06:34:10,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:34:10,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 06:34:10,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-12-21 06:34:10,812 INFO L87 Difference]: Start difference. First operand 100 states and 136 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 06:34:10,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:34:10,861 INFO L93 Difference]: Finished difference Result 146 states and 208 transitions. [2023-12-21 06:34:10,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 06:34:10,862 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2023-12-21 06:34:10,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:34:10,863 INFO L225 Difference]: With dead ends: 146 [2023-12-21 06:34:10,863 INFO L226 Difference]: Without dead ends: 144 [2023-12-21 06:34:10,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-12-21 06:34:10,863 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 06:34:10,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 114 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 06:34:10,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-12-21 06:34:10,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 138. [2023-12-21 06:34:10,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 87 states have internal predecessors, (111), 45 states have call successors, (45), 6 states have call predecessors, (45), 6 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-12-21 06:34:10,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 200 transitions. [2023-12-21 06:34:10,882 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 200 transitions. Word has length 42 [2023-12-21 06:34:10,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:34:10,882 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 200 transitions. [2023-12-21 06:34:10,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 06:34:10,882 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 200 transitions. [2023-12-21 06:34:10,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-21 06:34:10,882 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:34:10,883 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:34:10,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-21 06:34:11,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:34:11,087 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:34:11,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:34:11,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1174265188, now seen corresponding path program 1 times [2023-12-21 06:34:11,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:34:11,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841588608] [2023-12-21 06:34:11,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:11,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:34:11,096 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:34:11,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111076946] [2023-12-21 06:34:11,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:11,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:34:11,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:34:11,097 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:34:11,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-21 06:34:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:34:11,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-21 06:34:11,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:34:11,222 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-21 06:34:11,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:34:11,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:34:11,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841588608] [2023-12-21 06:34:11,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:34:11,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111076946] [2023-12-21 06:34:11,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111076946] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 06:34:11,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 06:34:11,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-12-21 06:34:11,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467624527] [2023-12-21 06:34:11,270 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 06:34:11,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-21 06:34:11,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:34:11,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-21 06:34:11,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-12-21 06:34:11,271 INFO L87 Difference]: Start difference. First operand 138 states and 200 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 06:34:11,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:34:11,436 INFO L93 Difference]: Finished difference Result 214 states and 311 transitions. [2023-12-21 06:34:11,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 06:34:11,437 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2023-12-21 06:34:11,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:34:11,439 INFO L225 Difference]: With dead ends: 214 [2023-12-21 06:34:11,439 INFO L226 Difference]: Without dead ends: 212 [2023-12-21 06:34:11,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-12-21 06:34:11,440 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 36 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 06:34:11,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 212 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 06:34:11,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-12-21 06:34:11,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 206. [2023-12-21 06:34:11,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 128 states have (on average 1.296875) internal successors, (166), 129 states have internal predecessors, (166), 69 states have call successors, (69), 8 states have call predecessors, (69), 8 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2023-12-21 06:34:11,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 303 transitions. [2023-12-21 06:34:11,473 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 303 transitions. Word has length 42 [2023-12-21 06:34:11,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:34:11,474 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 303 transitions. [2023-12-21 06:34:11,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 06:34:11,474 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 303 transitions. [2023-12-21 06:34:11,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-21 06:34:11,476 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:34:11,476 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:34:11,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-21 06:34:11,681 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,SelfDestructingSolverStorable7 [2023-12-21 06:34:11,681 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:34:11,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:34:11,682 INFO L85 PathProgramCache]: Analyzing trace with hash 225223382, now seen corresponding path program 1 times [2023-12-21 06:34:11,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:34:11,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937481769] [2023-12-21 06:34:11,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:11,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:34:11,705 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:34:11,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148561215] [2023-12-21 06:34:11,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:11,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:34:11,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:34:11,711 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:34:11,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-21 06:34:11,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:34:11,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-21 06:34:11,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:34:11,784 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-21 06:34:11,784 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 06:34:11,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:34:11,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937481769] [2023-12-21 06:34:11,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:34:11,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148561215] [2023-12-21 06:34:11,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148561215] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 06:34:11,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 06:34:11,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-21 06:34:11,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485405655] [2023-12-21 06:34:11,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 06:34:11,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-21 06:34:11,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:34:11,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-21 06:34:11,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-21 06:34:11,786 INFO L87 Difference]: Start difference. First operand 206 states and 303 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-21 06:34:11,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:34:11,878 INFO L93 Difference]: Finished difference Result 316 states and 492 transitions. [2023-12-21 06:34:11,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-21 06:34:11,879 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2023-12-21 06:34:11,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:34:11,883 INFO L225 Difference]: With dead ends: 316 [2023-12-21 06:34:11,883 INFO L226 Difference]: Without dead ends: 314 [2023-12-21 06:34:11,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-21 06:34:11,885 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 06:34:11,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 152 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 06:34:11,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-12-21 06:34:11,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 290. [2023-12-21 06:34:11,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 147 states have (on average 1.2585034013605443) internal successors, (185), 164 states have internal predecessors, (185), 133 states have call successors, (133), 9 states have call predecessors, (133), 9 states have return successors, (132), 116 states have call predecessors, (132), 132 states have call successors, (132) [2023-12-21 06:34:11,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 450 transitions. [2023-12-21 06:34:11,938 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 450 transitions. Word has length 47 [2023-12-21 06:34:11,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:34:11,939 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 450 transitions. [2023-12-21 06:34:11,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-21 06:34:11,939 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 450 transitions. [2023-12-21 06:34:11,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-21 06:34:11,942 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:34:11,942 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:34:11,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-21 06:34:12,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:34:12,147 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:34:12,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:34:12,148 INFO L85 PathProgramCache]: Analyzing trace with hash -860263338, now seen corresponding path program 2 times [2023-12-21 06:34:12,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:34:12,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090950900] [2023-12-21 06:34:12,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:12,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:34:12,167 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:34:12,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737046344] [2023-12-21 06:34:12,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 06:34:12,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:34:12,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:34:12,181 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:34:12,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-21 06:34:12,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 06:34:12,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:34:12,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-21 06:34:12,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:34:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-21 06:34:12,264 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 06:34:12,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:34:12,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090950900] [2023-12-21 06:34:12,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:34:12,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737046344] [2023-12-21 06:34:12,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737046344] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 06:34:12,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 06:34:12,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 06:34:12,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201225078] [2023-12-21 06:34:12,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 06:34:12,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 06:34:12,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:34:12,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 06:34:12,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 06:34:12,266 INFO L87 Difference]: Start difference. First operand 290 states and 450 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 06:34:12,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:34:12,336 INFO L93 Difference]: Finished difference Result 377 states and 574 transitions. [2023-12-21 06:34:12,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 06:34:12,336 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2023-12-21 06:34:12,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:34:12,338 INFO L225 Difference]: With dead ends: 377 [2023-12-21 06:34:12,338 INFO L226 Difference]: Without dead ends: 199 [2023-12-21 06:34:12,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-21 06:34:12,342 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 19 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 06:34:12,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 155 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 06:34:12,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-12-21 06:34:12,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2023-12-21 06:34:12,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 100 states have (on average 1.2) internal successors, (120), 111 states have internal predecessors, (120), 85 states have call successors, (85), 9 states have call predecessors, (85), 9 states have return successors, (84), 74 states have call predecessors, (84), 84 states have call successors, (84) [2023-12-21 06:34:12,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 289 transitions. [2023-12-21 06:34:12,377 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 289 transitions. Word has length 47 [2023-12-21 06:34:12,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:34:12,377 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 289 transitions. [2023-12-21 06:34:12,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 06:34:12,377 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 289 transitions. [2023-12-21 06:34:12,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-21 06:34:12,379 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:34:12,379 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:34:12,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-21 06:34:12,584 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,SelfDestructingSolverStorable9 [2023-12-21 06:34:12,584 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:34:12,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:34:12,584 INFO L85 PathProgramCache]: Analyzing trace with hash 371933676, now seen corresponding path program 1 times [2023-12-21 06:34:12,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:34:12,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386711457] [2023-12-21 06:34:12,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:12,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:34:12,593 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:34:12,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57007887] [2023-12-21 06:34:12,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:12,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:34:12,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:34:12,594 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:34:12,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-21 06:34:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:34:12,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-21 06:34:12,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:34:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-21 06:34:13,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:34:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-21 06:34:13,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:34:13,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386711457] [2023-12-21 06:34:13,922 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:34:13,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57007887] [2023-12-21 06:34:13,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57007887] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:34:13,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:34:13,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-12-21 06:34:13,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950629518] [2023-12-21 06:34:13,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:34:13,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-21 06:34:13,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:34:13,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-21 06:34:13,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-12-21 06:34:13,923 INFO L87 Difference]: Start difference. First operand 195 states and 289 transitions. Second operand has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-12-21 06:34:22,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:34:22,138 INFO L93 Difference]: Finished difference Result 447 states and 664 transitions. [2023-12-21 06:34:22,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-21 06:34:22,138 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 59 [2023-12-21 06:34:22,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:34:22,141 INFO L225 Difference]: With dead ends: 447 [2023-12-21 06:34:22,141 INFO L226 Difference]: Without dead ends: 344 [2023-12-21 06:34:22,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=474, Invalid=2282, Unknown=0, NotChecked=0, Total=2756 [2023-12-21 06:34:22,142 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 171 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-12-21 06:34:22,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 398 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-12-21 06:34:22,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2023-12-21 06:34:22,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 286. [2023-12-21 06:34:22,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 167 states have (on average 1.2035928143712575) internal successors, (201), 176 states have internal predecessors, (201), 105 states have call successors, (105), 13 states have call predecessors, (105), 13 states have return successors, (104), 96 states have call predecessors, (104), 104 states have call successors, (104) [2023-12-21 06:34:22,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 410 transitions. [2023-12-21 06:34:22,245 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 410 transitions. Word has length 59 [2023-12-21 06:34:22,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:34:22,245 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 410 transitions. [2023-12-21 06:34:22,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-12-21 06:34:22,245 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 410 transitions. [2023-12-21 06:34:22,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-21 06:34:22,246 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:34:22,246 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:34:22,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-21 06:34:22,451 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,SelfDestructingSolverStorable10 [2023-12-21 06:34:22,451 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:34:22,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:34:22,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1835197705, now seen corresponding path program 1 times [2023-12-21 06:34:22,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:34:22,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413818188] [2023-12-21 06:34:22,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:22,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:34:22,458 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:34:22,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923200309] [2023-12-21 06:34:22,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:22,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:34:22,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:34:22,463 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:34:22,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-21 06:34:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:34:22,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-21 06:34:22,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:34:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-21 06:34:22,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:34:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-21 06:34:22,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:34:22,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413818188] [2023-12-21 06:34:22,696 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:34:22,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923200309] [2023-12-21 06:34:22,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923200309] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:34:22,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:34:22,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 15 [2023-12-21 06:34:22,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316980473] [2023-12-21 06:34:22,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:34:22,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-21 06:34:22,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:34:22,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-21 06:34:22,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-12-21 06:34:22,698 INFO L87 Difference]: Start difference. First operand 286 states and 410 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2023-12-21 06:34:23,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:34:23,073 INFO L93 Difference]: Finished difference Result 308 states and 442 transitions. [2023-12-21 06:34:23,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-21 06:34:23,074 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) Word has length 69 [2023-12-21 06:34:23,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:34:23,075 INFO L225 Difference]: With dead ends: 308 [2023-12-21 06:34:23,075 INFO L226 Difference]: Without dead ends: 306 [2023-12-21 06:34:23,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2023-12-21 06:34:23,076 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 45 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 06:34:23,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 236 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 06:34:23,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-12-21 06:34:23,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 290. [2023-12-21 06:34:23,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 170 states have (on average 1.2) internal successors, (204), 179 states have internal predecessors, (204), 105 states have call successors, (105), 14 states have call predecessors, (105), 14 states have return successors, (104), 96 states have call predecessors, (104), 104 states have call successors, (104) [2023-12-21 06:34:23,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 413 transitions. [2023-12-21 06:34:23,152 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 413 transitions. Word has length 69 [2023-12-21 06:34:23,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:34:23,153 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 413 transitions. [2023-12-21 06:34:23,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2023-12-21 06:34:23,153 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 413 transitions. [2023-12-21 06:34:23,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-21 06:34:23,153 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:34:23,153 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:34:23,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-21 06:34:23,358 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,SelfDestructingSolverStorable11 [2023-12-21 06:34:23,359 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:34:23,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:34:23,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1365578820, now seen corresponding path program 1 times [2023-12-21 06:34:23,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:34:23,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97642355] [2023-12-21 06:34:23,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:23,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:34:23,366 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:34:23,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20023970] [2023-12-21 06:34:23,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:23,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:34:23,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:34:23,373 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:34:23,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-21 06:34:23,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:34:23,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-21 06:34:23,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:34:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-21 06:34:23,441 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 06:34:23,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:34:23,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97642355] [2023-12-21 06:34:23,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:34:23,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20023970] [2023-12-21 06:34:23,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20023970] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 06:34:23,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 06:34:23,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 06:34:23,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608500385] [2023-12-21 06:34:23,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 06:34:23,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 06:34:23,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:34:23,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 06:34:23,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-21 06:34:23,443 INFO L87 Difference]: Start difference. First operand 290 states and 413 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-21 06:34:23,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:34:23,555 INFO L93 Difference]: Finished difference Result 516 states and 741 transitions. [2023-12-21 06:34:23,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 06:34:23,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 72 [2023-12-21 06:34:23,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:34:23,556 INFO L225 Difference]: With dead ends: 516 [2023-12-21 06:34:23,556 INFO L226 Difference]: Without dead ends: 316 [2023-12-21 06:34:23,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-21 06:34:23,557 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 06:34:23,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 06:34:23,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-12-21 06:34:23,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 307. [2023-12-21 06:34:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 187 states have (on average 1.2032085561497325) internal successors, (225), 188 states have internal predecessors, (225), 105 states have call successors, (105), 14 states have call predecessors, (105), 14 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2023-12-21 06:34:23,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 434 transitions. [2023-12-21 06:34:23,633 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 434 transitions. Word has length 72 [2023-12-21 06:34:23,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:34:23,633 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 434 transitions. [2023-12-21 06:34:23,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-21 06:34:23,633 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 434 transitions. [2023-12-21 06:34:23,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-21 06:34:23,634 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:34:23,634 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:34:23,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-21 06:34:23,839 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,SelfDestructingSolverStorable12 [2023-12-21 06:34:23,839 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:34:23,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:34:23,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1054791738, now seen corresponding path program 2 times [2023-12-21 06:34:23,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:34:23,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100967148] [2023-12-21 06:34:23,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:23,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:34:23,858 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:34:23,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1329874191] [2023-12-21 06:34:23,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 06:34:23,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:34:23,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:34:23,870 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:34:23,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-21 06:34:23,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 06:34:23,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:34:23,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 64 conjunts are in the unsatisfiable core [2023-12-21 06:34:23,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:34:24,514 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 35 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-12-21 06:34:24,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:34:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-21 06:34:26,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:34:26,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100967148] [2023-12-21 06:34:26,051 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:34:26,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329874191] [2023-12-21 06:34:26,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329874191] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:34:26,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:34:26,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2023-12-21 06:34:26,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959780702] [2023-12-21 06:34:26,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:34:26,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-21 06:34:26,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:34:26,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-21 06:34:26,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2023-12-21 06:34:26,052 INFO L87 Difference]: Start difference. First operand 307 states and 434 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 27 states have internal predecessors, (63), 8 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2023-12-21 06:34:40,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:34:40,067 INFO L93 Difference]: Finished difference Result 393 states and 540 transitions. [2023-12-21 06:34:40,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-21 06:34:40,067 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 27 states have internal predecessors, (63), 8 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 72 [2023-12-21 06:34:40,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:34:40,089 INFO L225 Difference]: With dead ends: 393 [2023-12-21 06:34:40,089 INFO L226 Difference]: Without dead ends: 391 [2023-12-21 06:34:40,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=632, Invalid=2908, Unknown=0, NotChecked=0, Total=3540 [2023-12-21 06:34:40,091 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 198 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-12-21 06:34:40,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 499 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-12-21 06:34:40,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2023-12-21 06:34:40,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 347. [2023-12-21 06:34:40,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 217 states have (on average 1.1797235023041475) internal successors, (256), 220 states have internal predecessors, (256), 109 states have call successors, (109), 20 states have call predecessors, (109), 20 states have return successors, (108), 106 states have call predecessors, (108), 108 states have call successors, (108) [2023-12-21 06:34:40,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 473 transitions. [2023-12-21 06:34:40,242 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 473 transitions. Word has length 72 [2023-12-21 06:34:40,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:34:40,242 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 473 transitions. [2023-12-21 06:34:40,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 27 states have internal predecessors, (63), 8 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2023-12-21 06:34:40,243 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 473 transitions. [2023-12-21 06:34:40,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-21 06:34:40,244 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:34:40,244 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:34:40,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-21 06:34:40,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:34:40,449 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:34:40,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:34:40,457 INFO L85 PathProgramCache]: Analyzing trace with hash 807741843, now seen corresponding path program 1 times [2023-12-21 06:34:40,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:34:40,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405853696] [2023-12-21 06:34:40,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:40,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:34:40,475 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:34:40,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325544630] [2023-12-21 06:34:40,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:34:40,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:34:40,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:34:40,477 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:34:40,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-21 06:34:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:34:40,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 76 conjunts are in the unsatisfiable core [2023-12-21 06:34:40,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:34:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-12-21 06:34:41,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:34:49,084 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-12-21 06:34:49,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:34:49,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405853696] [2023-12-21 06:34:49,085 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:34:49,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325544630] [2023-12-21 06:34:49,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325544630] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:34:49,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:34:49,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-12-21 06:34:49,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40614213] [2023-12-21 06:34:49,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:34:49,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-21 06:34:49,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:34:49,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-21 06:34:49,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2023-12-21 06:34:49,087 INFO L87 Difference]: Start difference. First operand 347 states and 473 transitions. Second operand has 33 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-12-21 06:35:06,660 WARN L293 SmtUtils]: Spent 5.22s on a formula simplification. DAG size of input: 90 DAG size of output: 87 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 06:35:13,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:35:13,074 INFO L93 Difference]: Finished difference Result 530 states and 742 transitions. [2023-12-21 06:35:13,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-12-21 06:35:13,074 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 86 [2023-12-21 06:35:13,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:35:13,076 INFO L225 Difference]: With dead ends: 530 [2023-12-21 06:35:13,076 INFO L226 Difference]: Without dead ends: 522 [2023-12-21 06:35:13,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=1290, Invalid=5516, Unknown=0, NotChecked=0, Total=6806 [2023-12-21 06:35:13,078 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 288 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2023-12-21 06:35:13,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 872 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2023-12-21 06:35:13,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2023-12-21 06:35:13,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 498. [2023-12-21 06:35:13,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 310 states have (on average 1.2) internal successors, (372), 314 states have internal predecessors, (372), 163 states have call successors, (163), 24 states have call predecessors, (163), 24 states have return successors, (162), 159 states have call predecessors, (162), 162 states have call successors, (162) [2023-12-21 06:35:13,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 697 transitions. [2023-12-21 06:35:13,423 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 697 transitions. Word has length 86 [2023-12-21 06:35:13,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:35:13,423 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 697 transitions. [2023-12-21 06:35:13,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-12-21 06:35:13,424 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 697 transitions. [2023-12-21 06:35:13,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-21 06:35:13,424 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:35:13,425 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:35:13,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-21 06:35:13,636 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,SelfDestructingSolverStorable14 [2023-12-21 06:35:13,636 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:35:13,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:35:13,637 INFO L85 PathProgramCache]: Analyzing trace with hash 263580550, now seen corresponding path program 3 times [2023-12-21 06:35:13,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:35:13,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963918242] [2023-12-21 06:35:13,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:13,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:35:13,644 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:35:13,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341045554] [2023-12-21 06:35:13,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 06:35:13,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:35:13,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:35:13,647 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:35:13,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-21 06:35:13,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-21 06:35:13,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:35:13,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 61 conjunts are in the unsatisfiable core [2023-12-21 06:35:13,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:35:14,297 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 25 proven. 38 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-12-21 06:35:14,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:35:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-12-21 06:35:15,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:35:15,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963918242] [2023-12-21 06:35:15,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:35:15,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341045554] [2023-12-21 06:35:15,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341045554] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:35:15,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:35:15,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2023-12-21 06:35:15,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659542837] [2023-12-21 06:35:15,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:35:15,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-21 06:35:15,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:35:15,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-21 06:35:15,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2023-12-21 06:35:15,720 INFO L87 Difference]: Start difference. First operand 498 states and 697 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 28 states have internal predecessors, (68), 7 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) [2023-12-21 06:35:44,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:35:44,155 INFO L93 Difference]: Finished difference Result 722 states and 1036 transitions. [2023-12-21 06:35:44,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-12-21 06:35:44,155 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 28 states have internal predecessors, (68), 7 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) Word has length 92 [2023-12-21 06:35:44,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:35:44,158 INFO L225 Difference]: With dead ends: 722 [2023-12-21 06:35:44,158 INFO L226 Difference]: Without dead ends: 720 [2023-12-21 06:35:44,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=1040, Invalid=4510, Unknown=0, NotChecked=0, Total=5550 [2023-12-21 06:35:44,160 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 371 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2023-12-21 06:35:44,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 649 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 11.2s Time] [2023-12-21 06:35:44,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2023-12-21 06:35:44,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 584. [2023-12-21 06:35:44,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 364 states have (on average 1.2005494505494505) internal successors, (437), 367 states have internal predecessors, (437), 193 states have call successors, (193), 26 states have call predecessors, (193), 26 states have return successors, (192), 190 states have call predecessors, (192), 192 states have call successors, (192) [2023-12-21 06:35:44,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 822 transitions. [2023-12-21 06:35:44,562 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 822 transitions. Word has length 92 [2023-12-21 06:35:44,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:35:44,562 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 822 transitions. [2023-12-21 06:35:44,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 28 states have internal predecessors, (68), 7 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) [2023-12-21 06:35:44,562 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 822 transitions. [2023-12-21 06:35:44,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-12-21 06:35:44,566 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:35:44,567 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:35:44,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-21 06:35:44,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-21 06:35:44,772 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:35:44,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:35:44,772 INFO L85 PathProgramCache]: Analyzing trace with hash -842150628, now seen corresponding path program 2 times [2023-12-21 06:35:44,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:35:44,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644642001] [2023-12-21 06:35:44,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:44,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:35:44,783 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:35:44,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711369896] [2023-12-21 06:35:44,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 06:35:44,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:35:44,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:35:44,784 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:35:44,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-21 06:35:44,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 06:35:44,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:35:44,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-21 06:35:44,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:35:44,915 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-12-21 06:35:44,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:35:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-12-21 06:35:44,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:35:44,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644642001] [2023-12-21 06:35:44,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:35:44,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711369896] [2023-12-21 06:35:44,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711369896] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:35:44,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:35:44,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2023-12-21 06:35:44,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010536485] [2023-12-21 06:35:44,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:35:44,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-21 06:35:44,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:35:44,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-21 06:35:44,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-12-21 06:35:44,999 INFO L87 Difference]: Start difference. First operand 584 states and 822 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-21 06:35:45,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:35:45,752 INFO L93 Difference]: Finished difference Result 693 states and 996 transitions. [2023-12-21 06:35:45,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-21 06:35:45,753 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 94 [2023-12-21 06:35:45,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:35:45,755 INFO L225 Difference]: With dead ends: 693 [2023-12-21 06:35:45,755 INFO L226 Difference]: Without dead ends: 686 [2023-12-21 06:35:45,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 176 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2023-12-21 06:35:45,756 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 67 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 06:35:45,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 383 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 06:35:45,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2023-12-21 06:35:46,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 558. [2023-12-21 06:35:46,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 342 states have (on average 1.2017543859649122) internal successors, (411), 345 states have internal predecessors, (411), 189 states have call successors, (189), 26 states have call predecessors, (189), 26 states have return successors, (188), 186 states have call predecessors, (188), 188 states have call successors, (188) [2023-12-21 06:35:46,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 788 transitions. [2023-12-21 06:35:46,128 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 788 transitions. Word has length 94 [2023-12-21 06:35:46,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:35:46,128 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 788 transitions. [2023-12-21 06:35:46,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-21 06:35:46,128 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 788 transitions. [2023-12-21 06:35:46,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-12-21 06:35:46,130 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:35:46,130 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:35:46,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-21 06:35:46,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-21 06:35:46,337 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:35:46,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:35:46,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1341117113, now seen corresponding path program 2 times [2023-12-21 06:35:46,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:35:46,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986244088] [2023-12-21 06:35:46,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:46,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:35:46,352 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:35:46,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229031291] [2023-12-21 06:35:46,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 06:35:46,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:35:46,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:35:46,354 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:35:46,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-21 06:35:46,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 06:35:46,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:35:46,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 68 conjunts are in the unsatisfiable core [2023-12-21 06:35:46,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:35:47,265 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 47 proven. 46 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-12-21 06:35:47,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:35:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 38 proven. 46 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-12-21 06:35:50,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:35:50,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986244088] [2023-12-21 06:35:50,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:35:50,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229031291] [2023-12-21 06:35:50,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229031291] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:35:50,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:35:50,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2023-12-21 06:35:50,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449316297] [2023-12-21 06:35:50,856 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:35:50,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-21 06:35:50,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:35:50,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-21 06:35:50,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2023-12-21 06:35:50,857 INFO L87 Difference]: Start difference. First operand 558 states and 788 transitions. Second operand has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) [2023-12-21 06:36:20,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:36:35,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:36:35,967 INFO L93 Difference]: Finished difference Result 913 states and 1292 transitions. [2023-12-21 06:36:35,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-12-21 06:36:35,968 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) Word has length 106 [2023-12-21 06:36:35,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:36:35,971 INFO L225 Difference]: With dead ends: 913 [2023-12-21 06:36:35,971 INFO L226 Difference]: Without dead ends: 756 [2023-12-21 06:36:35,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2236 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=1504, Invalid=6686, Unknown=0, NotChecked=0, Total=8190 [2023-12-21 06:36:35,973 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 217 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2023-12-21 06:36:35,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 676 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time] [2023-12-21 06:36:35,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2023-12-21 06:36:36,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 703. [2023-12-21 06:36:36,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 429 states have (on average 1.1981351981351982) internal successors, (514), 433 states have internal predecessors, (514), 243 states have call successors, (243), 30 states have call predecessors, (243), 30 states have return successors, (242), 239 states have call predecessors, (242), 242 states have call successors, (242) [2023-12-21 06:36:36,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 999 transitions. [2023-12-21 06:36:36,573 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 999 transitions. Word has length 106 [2023-12-21 06:36:36,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:36:36,574 INFO L495 AbstractCegarLoop]: Abstraction has 703 states and 999 transitions. [2023-12-21 06:36:36,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) [2023-12-21 06:36:36,574 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 999 transitions. [2023-12-21 06:36:36,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-21 06:36:36,575 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:36:36,575 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:36:36,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-21 06:36:36,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-21 06:36:36,780 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:36:36,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:36:36,780 INFO L85 PathProgramCache]: Analyzing trace with hash 909912329, now seen corresponding path program 1 times [2023-12-21 06:36:36,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:36:36,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344168642] [2023-12-21 06:36:36,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:36:36,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:36:36,786 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:36:36,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581525160] [2023-12-21 06:36:36,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:36:36,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:36:36,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:36:36,787 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:36:36,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-21 06:36:36,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:36:36,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-21 06:36:36,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:36:37,135 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-12-21 06:36:37,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:36:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2023-12-21 06:36:37,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:36:37,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344168642] [2023-12-21 06:36:37,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:36:37,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581525160] [2023-12-21 06:36:37,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581525160] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:36:37,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:36:37,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 26 [2023-12-21 06:36:37,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178158584] [2023-12-21 06:36:37,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:36:37,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-21 06:36:37,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:36:37,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-21 06:36:37,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2023-12-21 06:36:37,690 INFO L87 Difference]: Start difference. First operand 703 states and 999 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 23 states have internal predecessors, (60), 9 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2023-12-21 06:36:42,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:36:42,257 INFO L93 Difference]: Finished difference Result 1845 states and 2835 transitions. [2023-12-21 06:36:42,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-12-21 06:36:42,257 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 23 states have internal predecessors, (60), 9 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 119 [2023-12-21 06:36:42,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:36:42,286 INFO L225 Difference]: With dead ends: 1845 [2023-12-21 06:36:42,286 INFO L226 Difference]: Without dead ends: 1612 [2023-12-21 06:36:42,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1848 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1281, Invalid=4725, Unknown=0, NotChecked=0, Total=6006 [2023-12-21 06:36:42,290 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 295 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-21 06:36:42,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 584 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-21 06:36:42,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2023-12-21 06:36:43,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1234. [2023-12-21 06:36:43,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 676 states have (on average 1.2485207100591715) internal successors, (844), 682 states have internal predecessors, (844), 521 states have call successors, (521), 36 states have call predecessors, (521), 36 states have return successors, (520), 515 states have call predecessors, (520), 520 states have call successors, (520) [2023-12-21 06:36:43,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1885 transitions. [2023-12-21 06:36:43,579 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1885 transitions. Word has length 119 [2023-12-21 06:36:43,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:36:43,581 INFO L495 AbstractCegarLoop]: Abstraction has 1234 states and 1885 transitions. [2023-12-21 06:36:43,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 23 states have internal predecessors, (60), 9 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2023-12-21 06:36:43,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1885 transitions. [2023-12-21 06:36:43,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-21 06:36:43,583 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:36:43,583 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:36:43,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-21 06:36:43,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:36:43,788 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:36:43,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:36:43,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1510458229, now seen corresponding path program 2 times [2023-12-21 06:36:43,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:36:43,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667368795] [2023-12-21 06:36:43,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:36:43,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:36:43,821 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:36:43,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204293117] [2023-12-21 06:36:43,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 06:36:43,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:36:43,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:36:43,822 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:36:43,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-21 06:36:43,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 06:36:43,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:36:43,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-21 06:36:43,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:36:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 32 proven. 58 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2023-12-21 06:36:44,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:36:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 26 proven. 55 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2023-12-21 06:36:47,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:36:47,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667368795] [2023-12-21 06:36:47,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:36:47,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204293117] [2023-12-21 06:36:47,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204293117] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:36:47,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:36:47,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2023-12-21 06:36:47,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344615593] [2023-12-21 06:36:47,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:36:47,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-21 06:36:47,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:36:47,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-21 06:36:47,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2023-12-21 06:36:47,794 INFO L87 Difference]: Start difference. First operand 1234 states and 1885 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 30 states have internal predecessors, (72), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2023-12-21 06:36:58,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:37:02,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:37:37,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:37:37,016 INFO L93 Difference]: Finished difference Result 1957 states and 3058 transitions. [2023-12-21 06:37:37,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-12-21 06:37:37,016 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 30 states have internal predecessors, (72), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) Word has length 119 [2023-12-21 06:37:37,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:37:37,024 INFO L225 Difference]: With dead ends: 1957 [2023-12-21 06:37:37,024 INFO L226 Difference]: Without dead ends: 1955 [2023-12-21 06:37:37,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=1401, Invalid=6081, Unknown=0, NotChecked=0, Total=7482 [2023-12-21 06:37:37,028 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 350 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 1330 mSolverCounterSat, 362 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 1330 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2023-12-21 06:37:37,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 946 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 1330 Invalid, 2 Unknown, 0 Unchecked, 20.2s Time] [2023-12-21 06:37:37,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2023-12-21 06:37:39,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1805. [2023-12-21 06:37:39,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1805 states, 959 states have (on average 1.275286757038582) internal successors, (1223), 968 states have internal predecessors, (1223), 802 states have call successors, (802), 43 states have call predecessors, (802), 43 states have return successors, (801), 793 states have call predecessors, (801), 801 states have call successors, (801) [2023-12-21 06:37:39,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1805 states to 1805 states and 2826 transitions. [2023-12-21 06:37:39,181 INFO L78 Accepts]: Start accepts. Automaton has 1805 states and 2826 transitions. Word has length 119 [2023-12-21 06:37:39,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:37:39,181 INFO L495 AbstractCegarLoop]: Abstraction has 1805 states and 2826 transitions. [2023-12-21 06:37:39,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 30 states have internal predecessors, (72), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2023-12-21 06:37:39,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1805 states and 2826 transitions. [2023-12-21 06:37:39,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-21 06:37:39,183 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:37:39,183 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:37:39,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-21 06:37:39,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:37:39,389 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:37:39,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:37:39,389 INFO L85 PathProgramCache]: Analyzing trace with hash -587810689, now seen corresponding path program 3 times [2023-12-21 06:37:39,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:37:39,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322896454] [2023-12-21 06:37:39,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:37:39,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:37:39,395 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:37:39,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034155367] [2023-12-21 06:37:39,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 06:37:39,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:37:39,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:37:39,396 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:37:39,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-21 06:37:39,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-21 06:37:39,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:37:39,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 77 conjunts are in the unsatisfiable core [2023-12-21 06:37:39,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:37:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 44 proven. 62 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-12-21 06:37:40,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:37:41,685 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 24 proven. 70 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-12-21 06:37:41,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:37:41,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322896454] [2023-12-21 06:37:41,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:37:41,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034155367] [2023-12-21 06:37:41,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034155367] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:37:41,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:37:41,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2023-12-21 06:37:41,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325136978] [2023-12-21 06:37:41,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:37:41,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-21 06:37:41,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:37:41,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-21 06:37:41,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2023-12-21 06:37:41,687 INFO L87 Difference]: Start difference. First operand 1805 states and 2826 transitions. Second operand has 34 states, 33 states have (on average 2.484848484848485) internal successors, (82), 30 states have internal predecessors, (82), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 9 states have call predecessors, (30), 8 states have call successors, (30) [2023-12-21 06:38:02,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:38:02,535 INFO L93 Difference]: Finished difference Result 2750 states and 4345 transitions. [2023-12-21 06:38:02,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-12-21 06:38:02,536 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.484848484848485) internal successors, (82), 30 states have internal predecessors, (82), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 9 states have call predecessors, (30), 8 states have call successors, (30) Word has length 119 [2023-12-21 06:38:02,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:38:02,545 INFO L225 Difference]: With dead ends: 2750 [2023-12-21 06:38:02,545 INFO L226 Difference]: Without dead ends: 2748 [2023-12-21 06:38:02,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1795 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=1362, Invalid=5948, Unknown=0, NotChecked=0, Total=7310 [2023-12-21 06:38:02,548 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 327 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 1478 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 1788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 1478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-12-21 06:38:02,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 1208 Invalid, 1788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 1478 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2023-12-21 06:38:02,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2023-12-21 06:38:05,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 2454. [2023-12-21 06:38:05,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2454 states, 1282 states have (on average 1.28393135725429) internal successors, (1646), 1297 states have internal predecessors, (1646), 1125 states have call successors, (1125), 46 states have call predecessors, (1125), 46 states have return successors, (1124), 1110 states have call predecessors, (1124), 1124 states have call successors, (1124) [2023-12-21 06:38:05,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2454 states to 2454 states and 3895 transitions. [2023-12-21 06:38:05,836 INFO L78 Accepts]: Start accepts. Automaton has 2454 states and 3895 transitions. Word has length 119 [2023-12-21 06:38:05,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:38:05,836 INFO L495 AbstractCegarLoop]: Abstraction has 2454 states and 3895 transitions. [2023-12-21 06:38:05,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.484848484848485) internal successors, (82), 30 states have internal predecessors, (82), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 9 states have call predecessors, (30), 8 states have call successors, (30) [2023-12-21 06:38:05,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2454 states and 3895 transitions. [2023-12-21 06:38:05,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-12-21 06:38:05,838 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:38:05,839 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:38:05,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-21 06:38:06,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:38:06,044 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:38:06,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:38:06,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1949761216, now seen corresponding path program 3 times [2023-12-21 06:38:06,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:38:06,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326607471] [2023-12-21 06:38:06,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:38:06,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:38:06,054 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:38:06,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1415895841] [2023-12-21 06:38:06,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 06:38:06,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:38:06,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:38:06,056 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:38:06,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-21 06:38:06,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-21 06:38:06,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:38:06,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 86 conjunts are in the unsatisfiable core [2023-12-21 06:38:06,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:38:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 114 proven. 61 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2023-12-21 06:38:10,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:38:14,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:38:14,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326607471] [2023-12-21 06:38:14,516 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:38:14,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415895841] [2023-12-21 06:38:14,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415895841] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 06:38:14,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 06:38:14,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-12-21 06:38:14,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850351878] [2023-12-21 06:38:14,517 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 06:38:14,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-21 06:38:14,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:38:14,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-21 06:38:14,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1173, Unknown=0, NotChecked=0, Total=1406 [2023-12-21 06:38:14,518 INFO L87 Difference]: Start difference. First operand 2454 states and 3895 transitions. Second operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-12-21 06:38:20,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:38:20,351 INFO L93 Difference]: Finished difference Result 2594 states and 4104 transitions. [2023-12-21 06:38:20,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 06:38:20,351 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 133 [2023-12-21 06:38:20,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:38:20,381 INFO L225 Difference]: With dead ends: 2594 [2023-12-21 06:38:20,381 INFO L226 Difference]: Without dead ends: 2587 [2023-12-21 06:38:20,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=328, Invalid=1742, Unknown=0, NotChecked=0, Total=2070 [2023-12-21 06:38:20,383 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 84 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-21 06:38:20,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 474 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-21 06:38:20,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2023-12-21 06:38:23,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2569. [2023-12-21 06:38:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2569 states, 1336 states have (on average 1.284431137724551) internal successors, (1716), 1351 states have internal predecessors, (1716), 1181 states have call successors, (1181), 51 states have call predecessors, (1181), 51 states have return successors, (1180), 1166 states have call predecessors, (1180), 1180 states have call successors, (1180) [2023-12-21 06:38:23,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2569 states to 2569 states and 4077 transitions. [2023-12-21 06:38:23,945 INFO L78 Accepts]: Start accepts. Automaton has 2569 states and 4077 transitions. Word has length 133 [2023-12-21 06:38:23,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:38:23,945 INFO L495 AbstractCegarLoop]: Abstraction has 2569 states and 4077 transitions. [2023-12-21 06:38:23,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-12-21 06:38:23,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2569 states and 4077 transitions. [2023-12-21 06:38:23,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-12-21 06:38:23,947 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:38:23,947 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:38:23,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-21 06:38:24,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:38:24,153 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:38:24,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:38:24,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1696464488, now seen corresponding path program 4 times [2023-12-21 06:38:24,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:38:24,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644064838] [2023-12-21 06:38:24,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:38:24,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:38:24,180 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:38:24,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453435769] [2023-12-21 06:38:24,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 06:38:24,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:38:24,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:38:24,182 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:38:24,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-21 06:38:24,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 06:38:24,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:38:24,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 88 conjunts are in the unsatisfiable core [2023-12-21 06:38:24,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:38:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 76 proven. 66 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2023-12-21 06:38:25,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:38:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 70 proven. 63 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2023-12-21 06:38:45,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:38:45,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644064838] [2023-12-21 06:38:45,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:38:45,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453435769] [2023-12-21 06:38:45,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453435769] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:38:45,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:38:45,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 38 [2023-12-21 06:38:45,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782701498] [2023-12-21 06:38:45,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:38:45,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-21 06:38:45,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:38:45,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-21 06:38:45,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1200, Unknown=0, NotChecked=0, Total=1406 [2023-12-21 06:38:45,193 INFO L87 Difference]: Start difference. First operand 2569 states and 4077 transitions. Second operand has 38 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2023-12-21 06:38:54,976 WARN L293 SmtUtils]: Spent 6.58s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 06:38:59,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:39:07,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:39:46,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:39:50,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:40:07,423 WARN L293 SmtUtils]: Spent 16.08s on a formula simplification. DAG size of input: 115 DAG size of output: 113 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 06:40:20,223 WARN L293 SmtUtils]: Spent 5.98s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 06:40:44,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:40:44,614 INFO L93 Difference]: Finished difference Result 2959 states and 4655 transitions. [2023-12-21 06:40:44,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-12-21 06:40:44,614 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) Word has length 133 [2023-12-21 06:40:44,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:40:44,624 INFO L225 Difference]: With dead ends: 2959 [2023-12-21 06:40:44,624 INFO L226 Difference]: Without dead ends: 2951 [2023-12-21 06:40:44,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2683 ImplicationChecksByTransitivity, 87.3s TimeCoverageRelationStatistics Valid=1998, Invalid=8303, Unknown=1, NotChecked=0, Total=10302 [2023-12-21 06:40:44,625 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 379 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 1874 mSolverCounterSat, 435 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 2311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 435 IncrementalHoareTripleChecker+Valid, 1874 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.0s IncrementalHoareTripleChecker+Time [2023-12-21 06:40:44,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 1263 Invalid, 2311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [435 Valid, 1874 Invalid, 2 Unknown, 0 Unchecked, 35.0s Time] [2023-12-21 06:40:44,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2023-12-21 06:40:50,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2849. [2023-12-21 06:40:50,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 1491 states have (on average 1.2890677397719652) internal successors, (1922), 1506 states have internal predecessors, (1922), 1301 states have call successors, (1301), 56 states have call predecessors, (1301), 56 states have return successors, (1300), 1286 states have call predecessors, (1300), 1300 states have call successors, (1300) [2023-12-21 06:40:50,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 4523 transitions. [2023-12-21 06:40:50,043 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 4523 transitions. Word has length 133 [2023-12-21 06:40:50,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:40:50,043 INFO L495 AbstractCegarLoop]: Abstraction has 2849 states and 4523 transitions. [2023-12-21 06:40:50,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2023-12-21 06:40:50,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 4523 transitions. [2023-12-21 06:40:50,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-12-21 06:40:50,046 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:40:50,046 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:40:50,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-21 06:40:50,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:40:50,255 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:40:50,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:40:50,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1678810135, now seen corresponding path program 5 times [2023-12-21 06:40:50,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:40:50,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746668837] [2023-12-21 06:40:50,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:40:50,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:40:50,261 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:40:50,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997289080] [2023-12-21 06:40:50,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 06:40:50,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:40:50,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:40:50,263 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:40:50,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-21 06:40:50,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-12-21 06:40:50,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:40:50,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 106 conjunts are in the unsatisfiable core [2023-12-21 06:40:50,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:40:51,487 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 66 proven. 134 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-12-21 06:40:51,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:40:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 112 proven. 75 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2023-12-21 06:40:54,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:40:54,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746668837] [2023-12-21 06:40:54,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:40:54,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997289080] [2023-12-21 06:40:54,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997289080] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:40:54,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:40:54,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15] total 34 [2023-12-21 06:40:54,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793635415] [2023-12-21 06:40:54,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:40:54,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-21 06:40:54,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:40:54,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-21 06:40:54,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2023-12-21 06:40:54,789 INFO L87 Difference]: Start difference. First operand 2849 states and 4523 transitions. Second operand has 34 states, 32 states have (on average 2.53125) internal successors, (81), 32 states have internal predecessors, (81), 13 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 9 states have call predecessors, (36), 11 states have call successors, (36) [2023-12-21 06:41:07,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:41:19,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:41:19,833 INFO L93 Difference]: Finished difference Result 3473 states and 5531 transitions. [2023-12-21 06:41:19,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-12-21 06:41:19,833 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.53125) internal successors, (81), 32 states have internal predecessors, (81), 13 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 9 states have call predecessors, (36), 11 states have call successors, (36) Word has length 141 [2023-12-21 06:41:19,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:41:19,845 INFO L225 Difference]: With dead ends: 3473 [2023-12-21 06:41:19,845 INFO L226 Difference]: Without dead ends: 3469 [2023-12-21 06:41:19,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1864 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=925, Invalid=6557, Unknown=0, NotChecked=0, Total=7482 [2023-12-21 06:41:19,846 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 302 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 1741 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 2154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 1741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2023-12-21 06:41:19,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 1130 Invalid, 2154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 1741 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2023-12-21 06:41:19,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2023-12-21 06:41:25,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 3022. [2023-12-21 06:41:25,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3022 states, 1573 states have (on average 1.291163382072473) internal successors, (2031), 1587 states have internal predecessors, (2031), 1383 states have call successors, (1383), 65 states have call predecessors, (1383), 65 states have return successors, (1382), 1369 states have call predecessors, (1382), 1382 states have call successors, (1382) [2023-12-21 06:41:25,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4796 transitions. [2023-12-21 06:41:25,986 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 4796 transitions. Word has length 141 [2023-12-21 06:41:25,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:41:25,986 INFO L495 AbstractCegarLoop]: Abstraction has 3022 states and 4796 transitions. [2023-12-21 06:41:25,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.53125) internal successors, (81), 32 states have internal predecessors, (81), 13 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 9 states have call predecessors, (36), 11 states have call successors, (36) [2023-12-21 06:41:25,987 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 4796 transitions. [2023-12-21 06:41:25,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-12-21 06:41:25,989 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:41:25,990 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:41:26,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-21 06:41:26,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:41:26,195 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:41:26,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:41:26,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1313831839, now seen corresponding path program 6 times [2023-12-21 06:41:26,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:41:26,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292939652] [2023-12-21 06:41:26,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:41:26,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:41:26,202 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:41:26,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246382038] [2023-12-21 06:41:26,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 06:41:26,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:41:26,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:41:26,203 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:41:26,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-21 06:41:26,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-21 06:41:26,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:41:26,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 117 conjunts are in the unsatisfiable core [2023-12-21 06:41:26,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:41:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 65 proven. 175 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2023-12-21 06:41:29,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:41:38,882 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 120 proven. 69 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2023-12-21 06:41:38,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:41:38,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292939652] [2023-12-21 06:41:38,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:41:38,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246382038] [2023-12-21 06:41:38,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246382038] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:41:38,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:41:38,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 17] total 41 [2023-12-21 06:41:38,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368502228] [2023-12-21 06:41:38,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:41:38,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-21 06:41:38,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:41:38,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-21 06:41:38,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1391, Unknown=0, NotChecked=0, Total=1640 [2023-12-21 06:41:38,885 INFO L87 Difference]: Start difference. First operand 3022 states and 4796 transitions. Second operand has 41 states, 38 states have (on average 2.236842105263158) internal successors, (85), 35 states have internal predecessors, (85), 15 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (39), 13 states have call predecessors, (39), 13 states have call successors, (39) [2023-12-21 06:41:58,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:42:02,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:42:06,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:42:32,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:42:36,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:42:42,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:42:46,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:42:50,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:43:01,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:43:05,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:43:09,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:43:26,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:43:26,390 INFO L93 Difference]: Finished difference Result 3955 states and 6251 transitions. [2023-12-21 06:43:26,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-12-21 06:43:26,391 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 2.236842105263158) internal successors, (85), 35 states have internal predecessors, (85), 15 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (39), 13 states have call predecessors, (39), 13 states have call successors, (39) Word has length 141 [2023-12-21 06:43:26,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:43:26,404 INFO L225 Difference]: With dead ends: 3955 [2023-12-21 06:43:26,404 INFO L226 Difference]: Without dead ends: 3951 [2023-12-21 06:43:26,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3879 ImplicationChecksByTransitivity, 53.5s TimeCoverageRelationStatistics Valid=2221, Invalid=11351, Unknown=0, NotChecked=0, Total=13572 [2023-12-21 06:43:26,406 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 389 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 2323 mSolverCounterSat, 432 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 1566 SdHoareTripleChecker+Invalid, 2763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 2323 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.8s IncrementalHoareTripleChecker+Time [2023-12-21 06:43:26,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 1566 Invalid, 2763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 2323 Invalid, 8 Unknown, 0 Unchecked, 50.8s Time] [2023-12-21 06:43:26,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3951 states. [2023-12-21 06:43:34,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3951 to 3603. [2023-12-21 06:43:34,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3603 states, 1841 states have (on average 1.298750678978816) internal successors, (2391), 1855 states have internal predecessors, (2391), 1684 states have call successors, (1684), 77 states have call predecessors, (1684), 77 states have return successors, (1683), 1670 states have call predecessors, (1683), 1683 states have call successors, (1683) [2023-12-21 06:43:34,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3603 states to 3603 states and 5758 transitions. [2023-12-21 06:43:34,664 INFO L78 Accepts]: Start accepts. Automaton has 3603 states and 5758 transitions. Word has length 141 [2023-12-21 06:43:34,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:43:34,665 INFO L495 AbstractCegarLoop]: Abstraction has 3603 states and 5758 transitions. [2023-12-21 06:43:34,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 2.236842105263158) internal successors, (85), 35 states have internal predecessors, (85), 15 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (39), 13 states have call predecessors, (39), 13 states have call successors, (39) [2023-12-21 06:43:34,666 INFO L276 IsEmpty]: Start isEmpty. Operand 3603 states and 5758 transitions. [2023-12-21 06:43:34,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-12-21 06:43:34,677 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:43:34,684 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:43:34,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-21 06:43:34,892 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,SelfDestructingSolverStorable24 [2023-12-21 06:43:34,892 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:43:34,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:43:34,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1996551579, now seen corresponding path program 4 times [2023-12-21 06:43:34,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:43:34,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484755995] [2023-12-21 06:43:34,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:43:34,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:43:34,898 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:43:34,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621332129] [2023-12-21 06:43:34,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 06:43:34,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:43:34,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:43:34,904 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:43:34,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-21 06:43:34,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 06:43:34,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:43:34,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-21 06:43:35,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:43:37,677 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 76 proven. 114 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2023-12-21 06:43:37,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:43:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 117 proven. 9 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2023-12-21 06:43:38,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:43:38,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484755995] [2023-12-21 06:43:38,771 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:43:38,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621332129] [2023-12-21 06:43:38,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621332129] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:43:38,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:43:38,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 8] total 30 [2023-12-21 06:43:38,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6397679] [2023-12-21 06:43:38,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:43:38,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-21 06:43:38,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:43:38,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-21 06:43:38,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2023-12-21 06:43:38,773 INFO L87 Difference]: Start difference. First operand 3603 states and 5758 transitions. Second operand has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 26 states have internal predecessors, (80), 10 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2023-12-21 06:44:30,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:44:32,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:44:41,758 WARN L293 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 47 DAG size of output: 35 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 06:45:18,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:45:53,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:46:33,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:46:33,050 INFO L93 Difference]: Finished difference Result 4567 states and 7298 transitions. [2023-12-21 06:46:33,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-12-21 06:46:33,050 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 26 states have internal predecessors, (80), 10 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) Word has length 144 [2023-12-21 06:46:33,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:46:33,065 INFO L225 Difference]: With dead ends: 4567 [2023-12-21 06:46:33,065 INFO L226 Difference]: Without dead ends: 4565 [2023-12-21 06:46:33,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 113.2s TimeCoverageRelationStatistics Valid=1101, Invalid=6039, Unknown=0, NotChecked=0, Total=7140 [2023-12-21 06:46:33,067 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 168 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 1763 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 1900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.0s IncrementalHoareTripleChecker+Time [2023-12-21 06:46:33,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 1180 Invalid, 1900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1763 Invalid, 0 Unknown, 0 Unchecked, 52.0s Time] [2023-12-21 06:46:33,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4565 states. [2023-12-21 06:46:41,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4565 to 3651. [2023-12-21 06:46:41,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3651 states, 1877 states have (on average 1.293020777836974) internal successors, (2427), 1891 states have internal predecessors, (2427), 1684 states have call successors, (1684), 89 states have call predecessors, (1684), 89 states have return successors, (1683), 1670 states have call predecessors, (1683), 1683 states have call successors, (1683) [2023-12-21 06:46:41,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3651 states to 3651 states and 5794 transitions. [2023-12-21 06:46:41,653 INFO L78 Accepts]: Start accepts. Automaton has 3651 states and 5794 transitions. Word has length 144 [2023-12-21 06:46:41,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:46:41,653 INFO L495 AbstractCegarLoop]: Abstraction has 3651 states and 5794 transitions. [2023-12-21 06:46:41,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 26 states have internal predecessors, (80), 10 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2023-12-21 06:46:41,653 INFO L276 IsEmpty]: Start isEmpty. Operand 3651 states and 5794 transitions. [2023-12-21 06:46:41,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-12-21 06:46:41,656 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:46:41,656 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:46:41,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-12-21 06:46:41,861 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,SelfDestructingSolverStorable25 [2023-12-21 06:46:41,861 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:46:41,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:46:41,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1575492594, now seen corresponding path program 5 times [2023-12-21 06:46:41,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:46:41,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130946510] [2023-12-21 06:46:41,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:46:41,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:46:41,870 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:46:41,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001416792] [2023-12-21 06:46:41,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 06:46:41,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:46:41,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:46:41,871 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:46:41,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-21 06:46:42,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-12-21 06:46:42,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:46:42,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 109 conjunts are in the unsatisfiable core [2023-12-21 06:46:42,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:46:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 85 proven. 169 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2023-12-21 06:46:43,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:46:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 102 proven. 114 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-12-21 06:46:54,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:46:54,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130946510] [2023-12-21 06:46:54,633 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:46:54,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001416792] [2023-12-21 06:46:54,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001416792] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:46:54,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:46:54,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19] total 40 [2023-12-21 06:46:54,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883078516] [2023-12-21 06:46:54,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:46:54,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-21 06:46:54,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:46:54,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-21 06:46:54,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1269, Unknown=0, NotChecked=0, Total=1560 [2023-12-21 06:46:54,636 INFO L87 Difference]: Start difference. First operand 3651 states and 5794 transitions. Second operand has 40 states, 38 states have (on average 2.289473684210526) internal successors, (87), 37 states have internal predecessors, (87), 15 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (38), 11 states have call predecessors, (38), 13 states have call successors, (38) [2023-12-21 06:47:01,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:47:13,788 WARN L293 SmtUtils]: Spent 11.34s on a formula simplification that was a NOOP. DAG size: 111 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 06:47:16,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:47:23,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:47:26,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:47:31,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:47:37,190 WARN L293 SmtUtils]: Spent 5.10s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 06:47:54,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:48:03,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:48:08,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:48:08,381 INFO L93 Difference]: Finished difference Result 3931 states and 6172 transitions. [2023-12-21 06:48:08,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-12-21 06:48:08,382 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.289473684210526) internal successors, (87), 37 states have internal predecessors, (87), 15 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (38), 11 states have call predecessors, (38), 13 states have call successors, (38) Word has length 146 [2023-12-21 06:48:08,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:48:08,394 INFO L225 Difference]: With dead ends: 3931 [2023-12-21 06:48:08,394 INFO L226 Difference]: Without dead ends: 3929 [2023-12-21 06:48:08,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2717 ImplicationChecksByTransitivity, 40.4s TimeCoverageRelationStatistics Valid=1968, Invalid=8334, Unknown=0, NotChecked=0, Total=10302 [2023-12-21 06:48:08,403 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 310 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 419 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.6s IncrementalHoareTripleChecker+Time [2023-12-21 06:48:08,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 816 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 1280 Invalid, 3 Unknown, 0 Unchecked, 27.6s Time] [2023-12-21 06:48:08,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3929 states. [2023-12-21 06:48:17,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3929 to 3867. [2023-12-21 06:48:17,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3867 states, 2010 states have (on average 1.2880597014925372) internal successors, (2589), 2030 states have internal predecessors, (2589), 1760 states have call successors, (1760), 96 states have call predecessors, (1760), 96 states have return successors, (1759), 1740 states have call predecessors, (1759), 1759 states have call successors, (1759) [2023-12-21 06:48:17,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3867 states to 3867 states and 6108 transitions. [2023-12-21 06:48:17,977 INFO L78 Accepts]: Start accepts. Automaton has 3867 states and 6108 transitions. Word has length 146 [2023-12-21 06:48:17,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:48:17,977 INFO L495 AbstractCegarLoop]: Abstraction has 3867 states and 6108 transitions. [2023-12-21 06:48:17,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.289473684210526) internal successors, (87), 37 states have internal predecessors, (87), 15 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (38), 11 states have call predecessors, (38), 13 states have call successors, (38) [2023-12-21 06:48:17,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3867 states and 6108 transitions. [2023-12-21 06:48:17,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-12-21 06:48:17,981 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:48:17,981 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:48:18,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-21 06:48:18,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-21 06:48:18,187 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:48:18,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:48:18,187 INFO L85 PathProgramCache]: Analyzing trace with hash -353571929, now seen corresponding path program 7 times [2023-12-21 06:48:18,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:48:18,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639734173] [2023-12-21 06:48:18,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:48:18,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:48:18,193 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:48:18,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993613774] [2023-12-21 06:48:18,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 06:48:18,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:48:18,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:48:18,209 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:48:18,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-21 06:48:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:48:18,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 76 conjunts are in the unsatisfiable core [2023-12-21 06:48:18,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:48:19,431 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 84 proven. 91 refuted. 0 times theorem prover too weak. 718 trivial. 0 not checked. [2023-12-21 06:48:19,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2023-12-21 06:48:40,362 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-21 06:48:40,363 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-21 06:48:40,825 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 06:48:40,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-12-21 06:48:41,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-21 06:48:41,026 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 151 with TraceHistMax 21,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-4-1 term,while PolyPacSimplificationTermWalker was simplifying 4 xjuncts wrt. a ATOM-1 context. [2023-12-21 06:48:41,030 INFO L445 BasicCegarLoop]: Path program histogram: [7, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:48:41,032 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 06:48:41,036 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 06:48:41 BoogieIcfgContainer [2023-12-21 06:48:41,036 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 06:48:41,036 INFO L158 Benchmark]: Toolchain (without parser) took 876221.60ms. Allocated memory was 298.8MB in the beginning and 1.1GB in the end (delta: 765.5MB). Free memory was 258.2MB in the beginning and 834.2MB in the end (delta: -576.0MB). Peak memory consumption was 190.5MB. Max. memory is 8.0GB. [2023-12-21 06:48:41,037 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 176.2MB. Free memory was 122.3MB in the beginning and 122.2MB in the end (delta: 164.3kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 06:48:41,039 INFO L158 Benchmark]: CACSL2BoogieTranslator took 213.07ms. Allocated memory is still 298.8MB. Free memory was 257.8MB in the beginning and 246.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-21 06:48:41,039 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.95ms. Allocated memory is still 298.8MB. Free memory was 246.2MB in the beginning and 244.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 06:48:41,039 INFO L158 Benchmark]: Boogie Preprocessor took 44.19ms. Allocated memory is still 298.8MB. Free memory was 244.6MB in the beginning and 243.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-21 06:48:41,039 INFO L158 Benchmark]: RCFGBuilder took 239.20ms. Allocated memory is still 298.8MB. Free memory was 243.1MB in the beginning and 230.0MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-21 06:48:41,039 INFO L158 Benchmark]: TraceAbstraction took 875679.65ms. Allocated memory was 298.8MB in the beginning and 1.1GB in the end (delta: 765.5MB). Free memory was 229.5MB in the beginning and 834.2MB in the end (delta: -604.8MB). Peak memory consumption was 162.2MB. Max. memory is 8.0GB. [2023-12-21 06:48:41,040 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 176.2MB. Free memory was 122.3MB in the beginning and 122.2MB in the end (delta: 164.3kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 213.07ms. Allocated memory is still 298.8MB. Free memory was 257.8MB in the beginning and 246.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 39.95ms. Allocated memory is still 298.8MB. Free memory was 246.2MB in the beginning and 244.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 44.19ms. Allocated memory is still 298.8MB. Free memory was 244.6MB in the beginning and 243.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 239.20ms. Allocated memory is still 298.8MB. Free memory was 243.1MB in the beginning and 230.0MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 875679.65ms. Allocated memory was 298.8MB in the beginning and 1.1GB in the end (delta: 765.5MB). Free memory was 229.5MB in the beginning and 834.2MB in the end (delta: -604.8MB). Peak memory consumption was 162.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 13). Cancelled while NwaCegarLoop was analyzing trace of length 151 with TraceHistMax 21,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-4-1 term,while PolyPacSimplificationTermWalker was simplifying 4 xjuncts wrt. a ATOM-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 875.6s, OverallIterations: 28, TraceHistogramMax: 21, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.1s, AutomataDifference: 702.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 15 mSolverCounterUnknown, 4330 SdHoareTripleChecker+Valid, 244.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4227 mSDsluCounter, 14565 SdHoareTripleChecker+Invalid, 242.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 13380 mSDsCounter, 4252 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19765 IncrementalHoareTripleChecker+Invalid, 24032 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4252 mSolverCounterUnsat, 1185 mSDtfsCounter, 19765 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4835 GetRequests, 3557 SyntacticMatches, 15 SemanticMatches, 1263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26322 ImplicationChecksByTransitivity, 442.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3867occurred in iteration=27, InterpolantAutomatonStates: 924, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 50.6s AutomataMinimizationTime, 27 MinimizatonAttempts, 3270 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 91.1s InterpolantComputationTime, 2248 NumberOfCodeBlocks, 2113 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 3964 ConstructedInterpolants, 1 QuantifiedInterpolants, 39705 SizeOfPredicates, 144 NumberOfNonLiveVariables, 5217 ConjunctsInSsa, 1262 ConjunctsInUnsatCore, 46 InterpolantComputations, 8 PerfectInterpolantSequences, 10554/12317 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