/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-64bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.factorial4even.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-25 18:08:16,447 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-25 18:08:16,515 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2023-12-25 18:08:16,518 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-25 18:08:16,519 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-25 18:08:16,540 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-25 18:08:16,541 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-25 18:08:16,541 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-25 18:08:16,542 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-25 18:08:16,544 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-25 18:08:16,545 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-25 18:08:16,545 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-25 18:08:16,545 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-25 18:08:16,546 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-25 18:08:16,547 INFO L153 SettingsManager]: * Use SBE=true [2023-12-25 18:08:16,547 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-25 18:08:16,547 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-25 18:08:16,547 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-25 18:08:16,547 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-25 18:08:16,547 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-25 18:08:16,548 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-25 18:08:16,548 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-25 18:08:16,548 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-25 18:08:16,548 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-25 18:08:16,548 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-25 18:08:16,549 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-25 18:08:16,549 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-25 18:08:16,549 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-25 18:08:16,549 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-25 18:08:16,549 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-25 18:08:16,550 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-25 18:08:16,550 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-25 18:08:16,550 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-25 18:08:16,551 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-25 18:08:16,551 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-25 18:08:16,551 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-25 18:08:16,551 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-25 18:08:16,551 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-25 18:08:16,551 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-25 18:08:16,551 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-25 18:08:16,551 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-25 18:08:16,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-25 18:08:16,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-25 18:08:16,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-25 18:08:16,758 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-25 18:08:16,758 INFO L274 PluginConnector]: CDTParser initialized [2023-12-25 18:08:16,759 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.factorial4even.c [2023-12-25 18:08:17,826 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-25 18:08:18,001 INFO L384 CDTParser]: Found 1 translation units. [2023-12-25 18:08:18,002 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.factorial4even.c [2023-12-25 18:08:18,012 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/871388383/bcddaece07ab495b8031160111ae012d/FLAG5bbf7b5b3 [2023-12-25 18:08:18,030 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/871388383/bcddaece07ab495b8031160111ae012d [2023-12-25 18:08:18,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-25 18:08:18,035 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-25 18:08:18,037 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-25 18:08:18,037 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-25 18:08:18,041 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-25 18:08:18,042 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.12 06:08:18" (1/1) ... [2023-12-25 18:08:18,043 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b42d020 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 06:08:18, skipping insertion in model container [2023-12-25 18:08:18,043 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.12 06:08:18" (1/1) ... [2023-12-25 18:08:18,068 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-25 18:08:18,197 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.factorial4even.c[1439,1452] [2023-12-25 18:08:18,224 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-25 18:08:18,234 INFO L202 MainTranslator]: Completed pre-run [2023-12-25 18:08:18,246 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.factorial4even.c[1439,1452] [2023-12-25 18:08:18,258 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-25 18:08:18,270 INFO L206 MainTranslator]: Completed translation [2023-12-25 18:08:18,271 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 06:08:18 WrapperNode [2023-12-25 18:08:18,271 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-25 18:08:18,272 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-25 18:08:18,272 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-25 18:08:18,272 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-25 18:08:18,280 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 06:08:18" (1/1) ... [2023-12-25 18:08:18,290 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 06:08:18" (1/1) ... [2023-12-25 18:08:18,322 INFO L138 Inliner]: procedures = 17, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 110 [2023-12-25 18:08:18,323 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-25 18:08:18,323 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-25 18:08:18,323 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-25 18:08:18,323 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-25 18:08:18,337 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 06:08:18" (1/1) ... [2023-12-25 18:08:18,338 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 06:08:18" (1/1) ... [2023-12-25 18:08:18,341 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 06:08:18" (1/1) ... [2023-12-25 18:08:18,357 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]. [2023-12-25 18:08:18,358 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 06:08:18" (1/1) ... [2023-12-25 18:08:18,358 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 06:08:18" (1/1) ... [2023-12-25 18:08:18,363 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 06:08:18" (1/1) ... [2023-12-25 18:08:18,366 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 06:08:18" (1/1) ... [2023-12-25 18:08:18,368 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 06:08:18" (1/1) ... [2023-12-25 18:08:18,369 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 06:08:18" (1/1) ... [2023-12-25 18:08:18,372 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-25 18:08:18,383 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-25 18:08:18,383 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-25 18:08:18,383 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-25 18:08:18,384 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 06:08:18" (1/1) ... [2023-12-25 18:08:18,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-25 18:08:18,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-25 18:08:18,430 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) [2023-12-25 18:08:18,436 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 [2023-12-25 18:08:18,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-25 18:08:18,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-25 18:08:18,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-25 18:08:18,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-25 18:08:18,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-25 18:08:18,452 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-25 18:08:18,508 INFO L241 CfgBuilder]: Building ICFG [2023-12-25 18:08:18,510 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-25 18:08:18,754 INFO L282 CfgBuilder]: Performing block encoding [2023-12-25 18:08:18,773 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-25 18:08:18,773 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-25 18:08:18,774 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.12 06:08:18 BoogieIcfgContainer [2023-12-25 18:08:18,774 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-25 18:08:18,776 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-25 18:08:18,776 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-25 18:08:18,779 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-25 18:08:18,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.12 06:08:18" (1/3) ... [2023-12-25 18:08:18,780 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b52566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.12 06:08:18, skipping insertion in model container [2023-12-25 18:08:18,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 06:08:18" (2/3) ... [2023-12-25 18:08:18,780 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b52566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.12 06:08:18, skipping insertion in model container [2023-12-25 18:08:18,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.12 06:08:18" (3/3) ... [2023-12-25 18:08:18,781 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.factorial4even.c [2023-12-25 18:08:18,809 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-25 18:08:18,809 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-25 18:08:18,866 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-25 18:08:18,872 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;@219f569e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-25 18:08:18,872 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-25 18:08:18,875 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-25 18:08:18,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-25 18:08:18,882 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 18:08:18,884 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 18:08:18,886 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 18:08:18,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 18:08:18,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1386552517, now seen corresponding path program 1 times [2023-12-25 18:08:18,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-25 18:08:18,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332026675] [2023-12-25 18:08:18,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 18:08:18,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-25 18:08:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 18:08:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-25 18:08:19,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-25 18:08:19,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332026675] [2023-12-25 18:08:19,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332026675] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-25 18:08:19,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-25 18:08:19,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-25 18:08:19,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140752386] [2023-12-25 18:08:19,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-25 18:08:19,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-25 18:08:19,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-25 18:08:19,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-25 18:08:19,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-25 18:08:19,568 INFO L87 Difference]: Start difference. First operand has 29 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-25 18:08:19,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 18:08:19,731 INFO L93 Difference]: Finished difference Result 68 states and 107 transitions. [2023-12-25 18:08:19,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-25 18:08:19,734 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-25 18:08:19,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 18:08:19,739 INFO L225 Difference]: With dead ends: 68 [2023-12-25 18:08:19,740 INFO L226 Difference]: Without dead ends: 46 [2023-12-25 18:08:19,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-12-25 18:08:19,745 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 85 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-25 18:08:19,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 94 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-25 18:08:19,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-25 18:08:19,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 33. [2023-12-25 18:08:19,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 28 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-25 18:08:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2023-12-25 18:08:19,779 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 10 [2023-12-25 18:08:19,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 18:08:19,779 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2023-12-25 18:08:19,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-25 18:08:19,780 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2023-12-25 18:08:19,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-25 18:08:19,780 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 18:08:19,780 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 18:08:19,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-25 18:08:19,781 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 18:08:19,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 18:08:19,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1220180945, now seen corresponding path program 1 times [2023-12-25 18:08:19,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-25 18:08:19,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149007505] [2023-12-25 18:08:19,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 18:08:19,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-25 18:08:19,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 18:08:19,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-25 18:08:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 18:08:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-25 18:08:19,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-25 18:08:19,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149007505] [2023-12-25 18:08:19,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149007505] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-25 18:08:19,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-25 18:08:19,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-25 18:08:19,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290836274] [2023-12-25 18:08:19,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-25 18:08:19,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-25 18:08:19,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-25 18:08:19,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-25 18:08:19,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-25 18:08:19,942 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-25 18:08:20,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 18:08:20,012 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2023-12-25 18:08:20,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-25 18:08:20,012 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-12-25 18:08:20,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 18:08:20,016 INFO L225 Difference]: With dead ends: 55 [2023-12-25 18:08:20,017 INFO L226 Difference]: Without dead ends: 53 [2023-12-25 18:08:20,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-25 18:08:20,019 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 21 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-25 18:08:20,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 218 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-25 18:08:20,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-25 18:08:20,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2023-12-25 18:08:20,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 33 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-25 18:08:20,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2023-12-25 18:08:20,039 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 20 [2023-12-25 18:08:20,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 18:08:20,040 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2023-12-25 18:08:20,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-25 18:08:20,040 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2023-12-25 18:08:20,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-25 18:08:20,042 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 18:08:20,042 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 18:08:20,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-25 18:08:20,042 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 18:08:20,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 18:08:20,043 INFO L85 PathProgramCache]: Analyzing trace with hash 798532059, now seen corresponding path program 1 times [2023-12-25 18:08:20,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-25 18:08:20,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52483225] [2023-12-25 18:08:20,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 18:08:20,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-25 18:08:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 18:08:20,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-25 18:08:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 18:08:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-25 18:08:20,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-25 18:08:20,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52483225] [2023-12-25 18:08:20,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52483225] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-25 18:08:20,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-25 18:08:20,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-25 18:08:20,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388311435] [2023-12-25 18:08:20,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-25 18:08:20,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-25 18:08:20,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-25 18:08:20,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-25 18:08:20,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-25 18:08:20,118 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-25 18:08:20,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 18:08:20,149 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2023-12-25 18:08:20,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-25 18:08:20,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-12-25 18:08:20,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 18:08:20,152 INFO L225 Difference]: With dead ends: 68 [2023-12-25 18:08:20,153 INFO L226 Difference]: Without dead ends: 42 [2023-12-25 18:08:20,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-25 18:08:20,154 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-25 18:08:20,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 98 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-25 18:08:20,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-12-25 18:08:20,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2023-12-25 18:08:20,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 35 states have internal predecessors, (44), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-25 18:08:20,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2023-12-25 18:08:20,161 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 21 [2023-12-25 18:08:20,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 18:08:20,161 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2023-12-25 18:08:20,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-25 18:08:20,161 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2023-12-25 18:08:20,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-25 18:08:20,162 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 18:08:20,162 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 18:08:20,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-25 18:08:20,162 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 18:08:20,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 18:08:20,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1407493461, now seen corresponding path program 1 times [2023-12-25 18:08:20,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-25 18:08:20,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175803836] [2023-12-25 18:08:20,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 18:08:20,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-25 18:08:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 18:08:20,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-25 18:08:20,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 18:08:20,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-25 18:08:20,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-25 18:08:20,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175803836] [2023-12-25 18:08:20,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175803836] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-25 18:08:20,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-25 18:08:20,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-25 18:08:20,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49223994] [2023-12-25 18:08:20,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-25 18:08:20,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-25 18:08:20,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-25 18:08:20,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-25 18:08:20,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-25 18:08:20,452 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-25 18:08:20,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 18:08:20,548 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2023-12-25 18:08:20,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-25 18:08:20,549 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-12-25 18:08:20,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 18:08:20,550 INFO L225 Difference]: With dead ends: 82 [2023-12-25 18:08:20,550 INFO L226 Difference]: Without dead ends: 54 [2023-12-25 18:08:20,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-12-25 18:08:20,560 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 60 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-25 18:08:20,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 132 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-25 18:08:20,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-25 18:08:20,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2023-12-25 18:08:20,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 36 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-25 18:08:20,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2023-12-25 18:08:20,574 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 22 [2023-12-25 18:08:20,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 18:08:20,574 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2023-12-25 18:08:20,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-25 18:08:20,574 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2023-12-25 18:08:20,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-25 18:08:20,575 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 18:08:20,575 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 18:08:20,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-25 18:08:20,575 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 18:08:20,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 18:08:20,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1795578398, now seen corresponding path program 1 times [2023-12-25 18:08:20,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-25 18:08:20,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723028981] [2023-12-25 18:08:20,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 18:08:20,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-25 18:08:20,591 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-25 18:08:20,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028936235] [2023-12-25 18:08:20,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 18:08:20,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-25 18:08:20,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-25 18:08:20,611 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) [2023-12-25 18:08:20,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-25 18:08:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 18:08:20,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-25 18:08:20,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 18:08:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-25 18:08:20,939 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-25 18:08:20,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-25 18:08:20,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723028981] [2023-12-25 18:08:20,939 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-25 18:08:20,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028936235] [2023-12-25 18:08:20,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028936235] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-25 18:08:20,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-25 18:08:20,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-25 18:08:20,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708900346] [2023-12-25 18:08:20,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-25 18:08:20,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-25 18:08:20,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-25 18:08:20,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-25 18:08:20,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-25 18:08:20,941 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-25 18:08:21,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 18:08:21,024 INFO L93 Difference]: Finished difference Result 79 states and 100 transitions. [2023-12-25 18:08:21,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-25 18:08:21,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-12-25 18:08:21,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 18:08:21,025 INFO L225 Difference]: With dead ends: 79 [2023-12-25 18:08:21,025 INFO L226 Difference]: Without dead ends: 51 [2023-12-25 18:08:21,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-25 18:08:21,026 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-25 18:08:21,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 54 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-25 18:08:21,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-25 18:08:21,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2023-12-25 18:08:21,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 42 states have internal predecessors, (52), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-25 18:08:21,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2023-12-25 18:08:21,033 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 29 [2023-12-25 18:08:21,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 18:08:21,033 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2023-12-25 18:08:21,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-25 18:08:21,034 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2023-12-25 18:08:21,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-25 18:08:21,034 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 18:08:21,034 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 18:08:21,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-25 18:08:21,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-25 18:08:21,242 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 18:08:21,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 18:08:21,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1322629854, now seen corresponding path program 1 times [2023-12-25 18:08:21,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-25 18:08:21,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131723157] [2023-12-25 18:08:21,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 18:08:21,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-25 18:08:21,255 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-25 18:08:21,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080051182] [2023-12-25 18:08:21,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 18:08:21,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-25 18:08:21,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-25 18:08:21,281 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) [2023-12-25 18:08:21,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-25 18:08:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 18:08:21,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 65 conjunts are in the unsatisfiable core [2023-12-25 18:08:21,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 18:08:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-25 18:08:21,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 18:08:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-25 18:08:22,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-25 18:08:22,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131723157] [2023-12-25 18:08:22,343 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-25 18:08:22,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080051182] [2023-12-25 18:08:22,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080051182] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-25 18:08:22,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-25 18:08:22,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-12-25 18:08:22,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205252516] [2023-12-25 18:08:22,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-25 18:08:22,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-25 18:08:22,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-25 18:08:22,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-25 18:08:22,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2023-12-25 18:08:22,348 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 25 states, 21 states have (on average 2.142857142857143) internal successors, (45), 24 states have internal predecessors, (45), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-25 18:08:22,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 18:08:22,993 INFO L93 Difference]: Finished difference Result 100 states and 129 transitions. [2023-12-25 18:08:22,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-25 18:08:22,995 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.142857142857143) internal successors, (45), 24 states have internal predecessors, (45), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2023-12-25 18:08:22,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 18:08:22,996 INFO L225 Difference]: With dead ends: 100 [2023-12-25 18:08:22,996 INFO L226 Difference]: Without dead ends: 98 [2023-12-25 18:08:22,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=295, Invalid=1265, Unknown=0, NotChecked=0, Total=1560 [2023-12-25 18:08:22,997 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 343 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-25 18:08:22,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 251 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-25 18:08:22,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-12-25 18:08:23,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2023-12-25 18:08:23,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 61 states have (on average 1.278688524590164) internal successors, (78), 64 states have internal predecessors, (78), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-25 18:08:23,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2023-12-25 18:08:23,012 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 30 [2023-12-25 18:08:23,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 18:08:23,012 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2023-12-25 18:08:23,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.142857142857143) internal successors, (45), 24 states have internal predecessors, (45), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-25 18:08:23,012 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2023-12-25 18:08:23,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-25 18:08:23,013 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 18:08:23,013 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-25 18:08:23,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-25 18:08:23,219 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,SelfDestructingSolverStorable5 [2023-12-25 18:08:23,219 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 18:08:23,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 18:08:23,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1984045176, now seen corresponding path program 1 times [2023-12-25 18:08:23,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-25 18:08:23,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059593614] [2023-12-25 18:08:23,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 18:08:23,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-25 18:08:23,229 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-25 18:08:23,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522812953] [2023-12-25 18:08:23,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 18:08:23,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-25 18:08:23,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-25 18:08:23,230 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) [2023-12-25 18:08:23,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-25 18:08:23,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 18:08:23,329 WARN L260 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 109 conjunts are in the unsatisfiable core [2023-12-25 18:08:23,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 18:08:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-25 18:08:23,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 18:08:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-25 18:08:25,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-25 18:08:25,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059593614] [2023-12-25 18:08:25,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-25 18:08:25,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522812953] [2023-12-25 18:08:25,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522812953] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-25 18:08:25,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-25 18:08:25,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 24] total 39 [2023-12-25 18:08:25,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49716740] [2023-12-25 18:08:25,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-25 18:08:25,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-25 18:08:25,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-25 18:08:25,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-25 18:08:25,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1270, Unknown=0, NotChecked=0, Total=1482 [2023-12-25 18:08:25,204 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand has 39 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 35 states have internal predecessors, (59), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-25 18:08:30,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 18:08:30,224 INFO L93 Difference]: Finished difference Result 204 states and 267 transitions. [2023-12-25 18:08:30,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-12-25 18:08:30,225 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 35 states have internal predecessors, (59), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 42 [2023-12-25 18:08:30,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 18:08:30,228 INFO L225 Difference]: With dead ends: 204 [2023-12-25 18:08:30,228 INFO L226 Difference]: Without dead ends: 158 [2023-12-25 18:08:30,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2838 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1968, Invalid=9374, Unknown=0, NotChecked=0, Total=11342 [2023-12-25 18:08:30,242 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 619 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-25 18:08:30,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [619 Valid, 179 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-25 18:08:30,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-12-25 18:08:30,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2023-12-25 18:08:30,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 76 states have internal predecessors, (89), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-25 18:08:30,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2023-12-25 18:08:30,275 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 42 [2023-12-25 18:08:30,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 18:08:30,275 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2023-12-25 18:08:30,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 35 states have internal predecessors, (59), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-25 18:08:30,275 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2023-12-25 18:08:30,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-25 18:08:30,279 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 18:08:30,279 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 18:08:30,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-25 18:08:30,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-25 18:08:30,487 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 18:08:30,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 18:08:30,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1420810627, now seen corresponding path program 1 times [2023-12-25 18:08:30,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-25 18:08:30,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592999252] [2023-12-25 18:08:30,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 18:08:30,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-25 18:08:30,500 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-25 18:08:30,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501844075] [2023-12-25 18:08:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 18:08:30,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-25 18:08:30,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-25 18:08:30,501 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) [2023-12-25 18:08:30,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-25 18:08:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 18:08:30,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-25 18:08:30,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 18:08:30,857 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-25 18:08:30,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 18:08:31,358 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-25 18:08:31,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-25 18:08:31,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592999252] [2023-12-25 18:08:31,358 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-25 18:08:31,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501844075] [2023-12-25 18:08:31,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501844075] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-25 18:08:31,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-25 18:08:31,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2023-12-25 18:08:31,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187099419] [2023-12-25 18:08:31,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-25 18:08:31,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-25 18:08:31,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-25 18:08:31,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-25 18:08:31,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2023-12-25 18:08:31,360 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand has 28 states, 25 states have (on average 2.56) internal successors, (64), 28 states have internal predecessors, (64), 8 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-25 18:08:32,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 18:08:32,043 INFO L93 Difference]: Finished difference Result 165 states and 208 transitions. [2023-12-25 18:08:32,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-25 18:08:32,044 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.56) internal successors, (64), 28 states have internal predecessors, (64), 8 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 50 [2023-12-25 18:08:32,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 18:08:32,044 INFO L225 Difference]: With dead ends: 165 [2023-12-25 18:08:32,044 INFO L226 Difference]: Without dead ends: 112 [2023-12-25 18:08:32,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=395, Invalid=1585, Unknown=0, NotChecked=0, Total=1980 [2023-12-25 18:08:32,046 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 197 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-25 18:08:32,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 217 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-25 18:08:32,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-12-25 18:08:32,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2023-12-25 18:08:32,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 87 states have (on average 1.1724137931034482) internal successors, (102), 90 states have internal predecessors, (102), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-25 18:08:32,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 132 transitions. [2023-12-25 18:08:32,058 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 132 transitions. Word has length 50 [2023-12-25 18:08:32,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 18:08:32,058 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 132 transitions. [2023-12-25 18:08:32,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.56) internal successors, (64), 28 states have internal predecessors, (64), 8 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-25 18:08:32,058 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 132 transitions. [2023-12-25 18:08:32,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-25 18:08:32,059 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 18:08:32,059 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 18:08:32,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-25 18:08:32,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-25 18:08:32,264 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 18:08:32,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 18:08:32,265 INFO L85 PathProgramCache]: Analyzing trace with hash -410426276, now seen corresponding path program 2 times [2023-12-25 18:08:32,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-25 18:08:32,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307561939] [2023-12-25 18:08:32,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 18:08:32,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-25 18:08:32,273 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-25 18:08:32,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [590619191] [2023-12-25 18:08:32,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-25 18:08:32,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-25 18:08:32,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-25 18:08:32,290 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) [2023-12-25 18:08:32,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-25 18:08:32,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-25 18:08:32,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-25 18:08:32,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 89 conjunts are in the unsatisfiable core [2023-12-25 18:08:32,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 18:08:33,398 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-25 18:08:33,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 18:08:34,265 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-25 18:08:34,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-25 18:08:34,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307561939] [2023-12-25 18:08:34,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-25 18:08:34,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590619191] [2023-12-25 18:08:34,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590619191] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-25 18:08:34,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-25 18:08:34,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 37 [2023-12-25 18:08:34,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825073783] [2023-12-25 18:08:34,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-25 18:08:34,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-25 18:08:34,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-25 18:08:34,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-25 18:08:34,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2023-12-25 18:08:34,268 INFO L87 Difference]: Start difference. First operand 107 states and 132 transitions. Second operand has 37 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 36 states have internal predecessors, (85), 10 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) [2023-12-25 18:08:53,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-12-25 18:08:54,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 18:08:54,279 INFO L93 Difference]: Finished difference Result 307 states and 402 transitions. [2023-12-25 18:08:54,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-25 18:08:54,279 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 36 states have internal predecessors, (85), 10 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) Word has length 70 [2023-12-25 18:08:54,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 18:08:54,281 INFO L225 Difference]: With dead ends: 307 [2023-12-25 18:08:54,282 INFO L226 Difference]: Without dead ends: 305 [2023-12-25 18:08:54,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=1055, Invalid=4198, Unknown=3, NotChecked=0, Total=5256 [2023-12-25 18:08:54,284 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 492 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 90 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-12-25 18:08:54,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 548 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 478 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2023-12-25 18:08:54,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-12-25 18:08:54,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 251. [2023-12-25 18:08:54,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 203 states have (on average 1.2216748768472907) internal successors, (248), 215 states have internal predecessors, (248), 41 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (41), 29 states have call predecessors, (41), 41 states have call successors, (41) [2023-12-25 18:08:54,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 330 transitions. [2023-12-25 18:08:54,334 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 330 transitions. Word has length 70 [2023-12-25 18:08:54,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 18:08:54,334 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 330 transitions. [2023-12-25 18:08:54,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 36 states have internal predecessors, (85), 10 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) [2023-12-25 18:08:54,334 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 330 transitions. [2023-12-25 18:08:54,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-25 18:08:54,336 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 18:08:54,336 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 18:08:54,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-25 18:08:54,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-25 18:08:54,543 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 18:08:54,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 18:08:54,544 INFO L85 PathProgramCache]: Analyzing trace with hash 286652354, now seen corresponding path program 2 times [2023-12-25 18:08:54,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-25 18:08:54,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999896477] [2023-12-25 18:08:54,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 18:08:54,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-25 18:08:54,559 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-25 18:08:54,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [951703394] [2023-12-25 18:08:54,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-25 18:08:54,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-25 18:08:54,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-25 18:08:54,561 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) [2023-12-25 18:08:54,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-25 18:08:54,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-25 18:08:54,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-25 18:08:54,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 169 conjunts are in the unsatisfiable core [2023-12-25 18:08:54,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 18:09:55,637 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 29 proven. 63 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-25 18:09:55,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 18:11:47,989 WARN L293 SmtUtils]: Spent 34.81s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-25 18:11:54,091 WARN L293 SmtUtils]: Spent 5.37s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-25 18:12:08,737 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-25 18:12:25,153 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-25 18:12:42,504 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-25 18:12:46,515 WARN L876 $PredicateComparison]: unable to prove that (or (let ((.cse0 (mod (* (mod |c_ULTIMATE.start_main_~state_3~0#1| 256) (mod |c_ULTIMATE.start_main_~state_4~0#1| 256)) 256)) (.cse7 (mod |c_ULTIMATE.start_main_~var_2~0#1| 256)) (.cse2 (mod |c_ULTIMATE.start_main_~var_16~0#1| 256)) (.cse5 (mod (+ |c_ULTIMATE.start_main_~var_2~0#1| |c_ULTIMATE.start_main_~state_4~0#1|) 256))) (and (forall ((v_y_62 Int) (v_z_64 Int) (v_y_64 Int)) (let ((.cse6 (* v_y_64 256))) (let ((.cse1 (+ v_z_64 .cse7)) (.cse3 (+ v_z_64 .cse6)) (.cse4 (+ v_z_64 (* v_y_62 256) .cse6))) (or (< v_z_64 0) (not (= (mod (* .cse0 v_z_64) 256) 1)) (< .cse1 (+ .cse2 1)) (< 255 .cse1) (< 255 .cse3) (< .cse4 0) (< .cse3 0) (< .cse5 .cse4))))) (forall ((v_y_62 Int) (v_z_64 Int) (v_y_64 Int)) (let ((.cse10 (* v_y_64 256))) (let ((.cse8 (+ v_z_64 .cse10)) (.cse9 (+ v_z_64 (* v_y_62 256) .cse10))) (or (not (= (mod (* .cse0 v_z_64) 256) 1)) (< 255 v_z_64) (< 255 .cse8) (< .cse9 0) (< .cse8 0) (< (+ v_z_64 .cse7) (+ 257 .cse2)) (< .cse5 .cse9))))))) (not (= (mod |c_ULTIMATE.start_main_~mask_SORT_12~0#1| 256) 1))) is different from true [2023-12-25 18:12:54,578 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-25 18:13:07,939 WARN L293 SmtUtils]: Spent 7.81s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-25 18:13:20,134 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-25 18:13:34,114 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-25 18:13:42,619 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-25 18:13:42,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-25 18:13:42,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999896477] [2023-12-25 18:13:42,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-25 18:13:42,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951703394] [2023-12-25 18:13:42,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951703394] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-25 18:13:42,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-25 18:13:42,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-12-25 18:13:42,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630711607] [2023-12-25 18:13:42,628 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-25 18:13:42,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-25 18:13:42,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-25 18:13:42,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-25 18:13:42,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=922, Unknown=26, NotChecked=64, Total=1190 [2023-12-25 18:13:42,629 INFO L87 Difference]: Start difference. First operand 251 states and 330 transitions. Second operand has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 22 states have internal predecessors, (52), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-25 18:13:46,669 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 [0] [2023-12-25 18:13:50,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-25 18:13:58,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-25 18:14:02,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-25 18:14:06,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-25 18:14:14,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-25 18:14:22,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-25 18:14:30,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-25 18:14:38,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-25 18:14:42,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-25 18:14:51,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-25 18:14:55,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-25 18:15:37,321 WARN L293 SmtUtils]: Spent 12.20s on a formula simplification. DAG size of input: 129 DAG size of output: 115 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-25 18:15:42,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-25 18:15:47,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-25 18:16:29,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-25 18:16:34,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-25 18:16:39,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-25 18:16:44,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-25 18:16:48,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-25 18:16:50,940 WARN L249 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-12-25 18:16:50,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 251.8s TimeCoverageRelationStatistics Valid=322, Invalid=1442, Unknown=46, NotChecked=82, Total=1892 [2023-12-25 18:16:50,941 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 6 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84.7s IncrementalHoareTripleChecker+Time [2023-12-25 18:16:50,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 215 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 277 Invalid, 19 Unknown, 0 Unchecked, 84.7s Time] [2023-12-25 18:16:50,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2023-12-25 18:16:50,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-25 18:16:51,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-25 18:16:51,143 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:665) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:269) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:449) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:159) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:365) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Broken pipe at java.base/java.io.FileOutputStream.writeBytes(Native Method) at java.base/java.io.FileOutputStream.write(FileOutputStream.java:354) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 36 more [2023-12-25 18:16:51,146 INFO L158 Benchmark]: Toolchain (without parser) took 513111.86ms. Allocated memory was 257.9MB in the beginning and 425.7MB in the end (delta: 167.8MB). Free memory was 198.2MB in the beginning and 274.0MB in the end (delta: -75.8MB). Peak memory consumption was 93.5MB. Max. memory is 8.0GB. [2023-12-25 18:16:51,146 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 179.3MB. Free memory is still 129.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-25 18:16:51,147 INFO L158 Benchmark]: CACSL2BoogieTranslator took 234.16ms. Allocated memory is still 257.9MB. Free memory was 197.9MB in the beginning and 186.3MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-25 18:16:51,147 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.53ms. Allocated memory is still 257.9MB. Free memory was 186.0MB in the beginning and 183.3MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-25 18:16:51,147 INFO L158 Benchmark]: Boogie Preprocessor took 49.19ms. Allocated memory is still 257.9MB. Free memory was 183.2MB in the beginning and 180.8MB in the end (delta: 2.4MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-12-25 18:16:51,147 INFO L158 Benchmark]: RCFGBuilder took 390.94ms. Allocated memory is still 257.9MB. Free memory was 180.8MB in the beginning and 220.1MB in the end (delta: -39.3MB). Peak memory consumption was 20.2MB. Max. memory is 8.0GB. [2023-12-25 18:16:51,147 INFO L158 Benchmark]: TraceAbstraction took 512370.15ms. Allocated memory was 257.9MB in the beginning and 425.7MB in the end (delta: 167.8MB). Free memory was 219.0MB in the beginning and 274.0MB in the end (delta: -55.0MB). Peak memory consumption was 113.1MB. Max. memory is 8.0GB. [2023-12-25 18:16:51,148 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 179.3MB. Free memory is still 129.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 234.16ms. Allocated memory is still 257.9MB. Free memory was 197.9MB in the beginning and 186.3MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 50.53ms. Allocated memory is still 257.9MB. Free memory was 186.0MB in the beginning and 183.3MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 49.19ms. Allocated memory is still 257.9MB. Free memory was 183.2MB in the beginning and 180.8MB in the end (delta: 2.4MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 390.94ms. Allocated memory is still 257.9MB. Free memory was 180.8MB in the beginning and 220.1MB in the end (delta: -39.3MB). Peak memory consumption was 20.2MB. Max. memory is 8.0GB. * TraceAbstraction took 512370.15ms. Allocated memory was 257.9MB in the beginning and 425.7MB in the end (delta: 167.8MB). Free memory was 219.0MB in the beginning and 274.0MB in the end (delta: -55.0MB). Peak memory consumption was 113.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...