/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/nla-digbench/egcd3-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 18:52:57,120 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 18:52:57,175 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 18:52:57,180 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 18:52:57,180 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 18:52:57,199 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 18:52:57,200 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 18:52:57,200 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 18:52:57,200 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 18:52:57,200 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 18:52:57,201 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 18:52:57,201 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 18:52:57,201 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 18:52:57,201 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 18:52:57,202 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 18:52:57,202 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 18:52:57,202 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 18:52:57,202 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 18:52:57,202 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 18:52:57,203 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 18:52:57,203 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 18:52:57,206 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 18:52:57,207 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 18:52:57,207 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 18:52:57,209 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 18:52:57,209 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 18:52:57,209 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 18:52:57,210 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 18:52:57,210 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 18:52:57,211 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 18:52:57,211 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 18:52:57,211 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 18:52:57,211 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 18:52:57,212 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 18:52:57,212 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 18:52:57,212 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 18:52:57,212 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 18:52:57,212 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 18:52:57,212 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 18:52:57,212 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 18:52:57,212 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 18:52:57,212 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 18:52:57,213 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 18:52:57,213 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 18:52:57,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 18:52:57,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 18:52:57,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 18:52:57,411 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 18:52:57,411 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 18:52:57,411 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd3-ll.c [2023-12-19 18:52:58,277 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 18:52:58,432 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 18:52:58,433 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd3-ll.c [2023-12-19 18:52:58,438 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f055422d2/8503be4d34e04a72a8d76b5bef028c2b/FLAGf8dd2c683 [2023-12-19 18:52:58,843 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f055422d2/8503be4d34e04a72a8d76b5bef028c2b [2023-12-19 18:52:58,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 18:52:58,847 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 18:52:58,849 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 18:52:58,850 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 18:52:58,852 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 18:52:58,853 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 06:52:58" (1/1) ... [2023-12-19 18:52:58,853 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@347c42bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:52:58, skipping insertion in model container [2023-12-19 18:52:58,854 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 06:52:58" (1/1) ... [2023-12-19 18:52:58,868 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 18:52:58,964 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd3-ll.c[490,503] [2023-12-19 18:52:58,983 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 18:52:58,989 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 18:52:58,996 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd3-ll.c[490,503] [2023-12-19 18:52:59,001 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 18:52:59,010 INFO L206 MainTranslator]: Completed translation [2023-12-19 18:52:59,010 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:52:59 WrapperNode [2023-12-19 18:52:59,010 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 18:52:59,011 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 18:52:59,011 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 18:52:59,011 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 18:52:59,015 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:52:59" (1/1) ... [2023-12-19 18:52:59,019 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:52:59" (1/1) ... [2023-12-19 18:52:59,030 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 81 [2023-12-19 18:52:59,030 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 18:52:59,031 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 18:52:59,031 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 18:52:59,031 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 18:52:59,037 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:52:59" (1/1) ... [2023-12-19 18:52:59,037 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:52:59" (1/1) ... [2023-12-19 18:52:59,038 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:52:59" (1/1) ... [2023-12-19 18:52:59,050 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]. [2023-12-19 18:52:59,050 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:52:59" (1/1) ... [2023-12-19 18:52:59,050 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:52:59" (1/1) ... [2023-12-19 18:52:59,052 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:52:59" (1/1) ... [2023-12-19 18:52:59,054 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:52:59" (1/1) ... [2023-12-19 18:52:59,055 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:52:59" (1/1) ... [2023-12-19 18:52:59,055 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:52:59" (1/1) ... [2023-12-19 18:52:59,056 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 18:52:59,057 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 18:52:59,057 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 18:52:59,057 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 18:52:59,058 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:52:59" (1/1) ... [2023-12-19 18:52:59,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 18:52:59,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:52:59,079 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) [2023-12-19 18:52:59,096 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 [2023-12-19 18:52:59,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 18:52:59,101 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-19 18:52:59,101 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-19 18:52:59,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 18:52:59,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 18:52:59,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 18:52:59,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-19 18:52:59,103 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-19 18:52:59,146 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 18:52:59,149 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 18:52:59,318 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 18:52:59,335 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 18:52:59,335 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-19 18:52:59,335 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 06:52:59 BoogieIcfgContainer [2023-12-19 18:52:59,335 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 18:52:59,342 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 18:52:59,342 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 18:52:59,344 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 18:52:59,344 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 06:52:58" (1/3) ... [2023-12-19 18:52:59,345 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1930a666 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 06:52:59, skipping insertion in model container [2023-12-19 18:52:59,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:52:59" (2/3) ... [2023-12-19 18:52:59,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1930a666 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 06:52:59, skipping insertion in model container [2023-12-19 18:52:59,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 06:52:59" (3/3) ... [2023-12-19 18:52:59,347 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2023-12-19 18:52:59,358 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 18:52:59,358 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 18:52:59,395 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 18:52:59,401 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;@5a450491, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 18:52:59,401 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 18:52:59,406 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-19 18:52:59,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-19 18:52:59,420 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:52:59,421 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:52:59,421 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:52:59,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:52:59,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1884886011, now seen corresponding path program 1 times [2023-12-19 18:52:59,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:52:59,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121127717] [2023-12-19 18:52:59,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:52:59,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:52:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:52:59,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:52:59,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121127717] [2023-12-19 18:52:59,530 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-19 18:52:59,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779355864] [2023-12-19 18:52:59,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:52:59,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:52:59,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:52:59,533 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) [2023-12-19 18:52:59,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 18:52:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:52:59,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-19 18:52:59,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:52:59,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-19 18:52:59,636 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 18:52:59,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779355864] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:52:59,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 18:52:59,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 18:52:59,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790091783] [2023-12-19 18:52:59,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:52:59,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-19 18:52:59,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:52:59,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-19 18:52:59,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 18:52:59,670 INFO L87 Difference]: Start difference. First operand has 29 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-19 18:52:59,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:52:59,697 INFO L93 Difference]: Finished difference Result 56 states and 92 transitions. [2023-12-19 18:52:59,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-19 18:52:59,699 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-12-19 18:52:59,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:52:59,703 INFO L225 Difference]: With dead ends: 56 [2023-12-19 18:52:59,703 INFO L226 Difference]: Without dead ends: 27 [2023-12-19 18:52:59,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 18:52:59,708 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:52:59,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:52:59,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-19 18:52:59,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-12-19 18:52:59,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-19 18:52:59,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2023-12-19 18:52:59,740 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 17 [2023-12-19 18:52:59,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:52:59,740 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2023-12-19 18:52:59,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-19 18:52:59,740 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2023-12-19 18:52:59,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-19 18:52:59,742 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:52:59,742 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:52:59,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-19 18:52:59,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-19 18:52:59,949 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:52:59,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:52:59,950 INFO L85 PathProgramCache]: Analyzing trace with hash 906212714, now seen corresponding path program 1 times [2023-12-19 18:52:59,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:52:59,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674365237] [2023-12-19 18:52:59,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:52:59,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:52:59,961 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:52:59,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358801407] [2023-12-19 18:52:59,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:52:59,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:52:59,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:52:59,970 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) [2023-12-19 18:52:59,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 18:53:00,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:53:00,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 18:53:00,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:53:00,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 18:53:00,062 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 18:53:00,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:53:00,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674365237] [2023-12-19 18:53:00,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:53:00,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358801407] [2023-12-19 18:53:00,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358801407] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:53:00,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 18:53:00,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-19 18:53:00,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718817365] [2023-12-19 18:53:00,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:53:00,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 18:53:00,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:53:00,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 18:53:00,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-19 18:53:00,065 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-19 18:53:00,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:53:00,141 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2023-12-19 18:53:00,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 18:53:00,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-12-19 18:53:00,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:53:00,143 INFO L225 Difference]: With dead ends: 46 [2023-12-19 18:53:00,143 INFO L226 Difference]: Without dead ends: 39 [2023-12-19 18:53:00,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-19 18:53:00,144 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 32 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:53:00,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 105 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:53:00,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-19 18:53:00,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2023-12-19 18:53:00,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-19 18:53:00,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2023-12-19 18:53:00,150 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 18 [2023-12-19 18:53:00,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:53:00,151 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2023-12-19 18:53:00,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-19 18:53:00,151 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2023-12-19 18:53:00,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-19 18:53:00,151 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:53:00,151 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:53:00,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-19 18:53:00,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-19 18:53:00,356 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:53:00,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:53:00,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1843908713, now seen corresponding path program 1 times [2023-12-19 18:53:00,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:53:00,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734187749] [2023-12-19 18:53:00,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:53:00,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:53:00,366 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:53:00,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911452057] [2023-12-19 18:53:00,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:53:00,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:53:00,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:53:00,368 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) [2023-12-19 18:53:00,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 18:53:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:53:00,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-19 18:53:00,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:53:00,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 18:53:00,554 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 18:53:00,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:53:00,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734187749] [2023-12-19 18:53:00,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:53:00,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911452057] [2023-12-19 18:53:00,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911452057] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:53:00,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 18:53:00,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-19 18:53:00,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117158043] [2023-12-19 18:53:00,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:53:00,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-19 18:53:00,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:53:00,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-19 18:53:00,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-19 18:53:00,558 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-19 18:53:00,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:53:00,644 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2023-12-19 18:53:00,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 18:53:00,644 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-12-19 18:53:00,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:53:00,645 INFO L225 Difference]: With dead ends: 45 [2023-12-19 18:53:00,645 INFO L226 Difference]: Without dead ends: 43 [2023-12-19 18:53:00,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-12-19 18:53:00,646 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 27 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:53:00,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 140 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:53:00,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-12-19 18:53:00,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2023-12-19 18:53:00,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-19 18:53:00,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2023-12-19 18:53:00,653 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 21 [2023-12-19 18:53:00,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:53:00,653 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2023-12-19 18:53:00,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-19 18:53:00,653 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2023-12-19 18:53:00,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-19 18:53:00,654 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:53:00,654 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:53:00,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-19 18:53:00,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:53:00,858 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:53:00,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:53:00,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1716078747, now seen corresponding path program 1 times [2023-12-19 18:53:00,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:53:00,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626653359] [2023-12-19 18:53:00,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:53:00,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:53:00,868 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:53:00,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274040015] [2023-12-19 18:53:00,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:53:00,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:53:00,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:53:00,878 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) [2023-12-19 18:53:00,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 18:53:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:53:00,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-19 18:53:00,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:53:00,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 18:53:00,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:53:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 18:53:01,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:53:01,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626653359] [2023-12-19 18:53:01,047 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:53:01,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274040015] [2023-12-19 18:53:01,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274040015] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:53:01,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 18:53:01,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-12-19 18:53:01,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448472630] [2023-12-19 18:53:01,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 18:53:01,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-19 18:53:01,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:53:01,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-19 18:53:01,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-12-19 18:53:01,050 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-19 18:53:01,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:53:01,177 INFO L93 Difference]: Finished difference Result 95 states and 133 transitions. [2023-12-19 18:53:01,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 18:53:01,177 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-12-19 18:53:01,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:53:01,180 INFO L225 Difference]: With dead ends: 95 [2023-12-19 18:53:01,181 INFO L226 Difference]: Without dead ends: 88 [2023-12-19 18:53:01,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-12-19 18:53:01,185 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 62 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:53:01,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 205 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:53:01,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-12-19 18:53:01,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2023-12-19 18:53:01,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 45 states have internal predecessors, (56), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-12-19 18:53:01,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2023-12-19 18:53:01,206 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 23 [2023-12-19 18:53:01,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:53:01,207 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2023-12-19 18:53:01,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-19 18:53:01,207 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2023-12-19 18:53:01,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-19 18:53:01,208 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:53:01,208 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:53:01,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-19 18:53:01,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:53:01,412 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:53:01,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:53:01,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1218198070, now seen corresponding path program 1 times [2023-12-19 18:53:01,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:53:01,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741435560] [2023-12-19 18:53:01,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:53:01,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:53:01,425 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:53:01,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410523900] [2023-12-19 18:53:01,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:53:01,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:53:01,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:53:01,429 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) [2023-12-19 18:53:01,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 18:53:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:53:01,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-19 18:53:01,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:53:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 18:53:01,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:53:01,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:53:01,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741435560] [2023-12-19 18:53:01,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:53:01,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410523900] [2023-12-19 18:53:01,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410523900] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:53:01,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 18:53:01,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-12-19 18:53:01,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597769343] [2023-12-19 18:53:01,858 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 18:53:01,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-19 18:53:01,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:53:01,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-19 18:53:01,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-12-19 18:53:01,859 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-19 18:53:02,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:53:02,071 INFO L93 Difference]: Finished difference Result 78 states and 104 transitions. [2023-12-19 18:53:02,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-19 18:53:02,071 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-12-19 18:53:02,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:53:02,072 INFO L225 Difference]: With dead ends: 78 [2023-12-19 18:53:02,072 INFO L226 Difference]: Without dead ends: 76 [2023-12-19 18:53:02,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-12-19 18:53:02,073 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 53 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 18:53:02,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 164 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 18:53:02,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-12-19 18:53:02,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2023-12-19 18:53:02,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-12-19 18:53:02,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2023-12-19 18:53:02,083 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 26 [2023-12-19 18:53:02,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:53:02,084 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2023-12-19 18:53:02,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-19 18:53:02,084 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2023-12-19 18:53:02,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-19 18:53:02,084 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:53:02,084 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:53:02,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-19 18:53:02,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:53:02,292 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:53:02,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:53:02,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1368676420, now seen corresponding path program 1 times [2023-12-19 18:53:02,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:53:02,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978421050] [2023-12-19 18:53:02,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:53:02,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:53:02,310 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:53:02,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785866864] [2023-12-19 18:53:02,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:53:02,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:53:02,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:53:02,313 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) [2023-12-19 18:53:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:53:02,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 18:53:02,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-19 18:53:02,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:53:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 18:53:02,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:53:02,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-19 18:53:02,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:53:02,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978421050] [2023-12-19 18:53:02,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:53:02,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785866864] [2023-12-19 18:53:02,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785866864] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:53:02,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 18:53:02,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2023-12-19 18:53:02,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012157416] [2023-12-19 18:53:02,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 18:53:02,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-19 18:53:02,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:53:02,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-19 18:53:02,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-12-19 18:53:02,539 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-19 18:53:02,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:53:02,711 INFO L93 Difference]: Finished difference Result 110 states and 149 transitions. [2023-12-19 18:53:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-19 18:53:02,711 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2023-12-19 18:53:02,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:53:02,712 INFO L225 Difference]: With dead ends: 110 [2023-12-19 18:53:02,712 INFO L226 Difference]: Without dead ends: 108 [2023-12-19 18:53:02,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-12-19 18:53:02,713 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 72 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:53:02,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 218 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:53:02,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-12-19 18:53:02,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 97. [2023-12-19 18:53:02,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 68 states have (on average 1.2647058823529411) internal successors, (86), 69 states have internal predecessors, (86), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-12-19 18:53:02,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 131 transitions. [2023-12-19 18:53:02,739 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 131 transitions. Word has length 26 [2023-12-19 18:53:02,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:53:02,739 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 131 transitions. [2023-12-19 18:53:02,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-19 18:53:02,739 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 131 transitions. [2023-12-19 18:53:02,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-19 18:53:02,741 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:53:02,741 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:53:02,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-19 18:53:02,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:53:02,945 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:53:02,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:53:02,946 INFO L85 PathProgramCache]: Analyzing trace with hash 612242103, now seen corresponding path program 1 times [2023-12-19 18:53:02,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:53:02,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680601755] [2023-12-19 18:53:02,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:53:02,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:53:02,958 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:53:02,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [482666511] [2023-12-19 18:53:02,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:53:02,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:53:02,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:53:02,959 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:53:02,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-19 18:53:02,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:53:02,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-19 18:53:02,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:53:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-19 18:53:03,057 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 18:53:03,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:53:03,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680601755] [2023-12-19 18:53:03,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:53:03,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482666511] [2023-12-19 18:53:03,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482666511] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:53:03,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 18:53:03,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-19 18:53:03,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79750181] [2023-12-19 18:53:03,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:53:03,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-19 18:53:03,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:53:03,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-19 18:53:03,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-12-19 18:53:03,058 INFO L87 Difference]: Start difference. First operand 97 states and 131 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-19 18:53:03,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:53:03,159 INFO L93 Difference]: Finished difference Result 110 states and 148 transitions. [2023-12-19 18:53:03,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 18:53:03,163 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2023-12-19 18:53:03,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:53:03,165 INFO L225 Difference]: With dead ends: 110 [2023-12-19 18:53:03,165 INFO L226 Difference]: Without dead ends: 108 [2023-12-19 18:53:03,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-12-19 18:53:03,166 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 40 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:53:03,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 155 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:53:03,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-12-19 18:53:03,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2023-12-19 18:53:03,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 73 states have (on average 1.2602739726027397) internal successors, (92), 74 states have internal predecessors, (92), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-12-19 18:53:03,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 145 transitions. [2023-12-19 18:53:03,185 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 145 transitions. Word has length 31 [2023-12-19 18:53:03,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:53:03,186 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 145 transitions. [2023-12-19 18:53:03,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-19 18:53:03,186 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 145 transitions. [2023-12-19 18:53:03,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-19 18:53:03,189 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:53:03,189 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:53:03,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-19 18:53:03,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:53:03,396 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:53:03,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:53:03,397 INFO L85 PathProgramCache]: Analyzing trace with hash -321449679, now seen corresponding path program 1 times [2023-12-19 18:53:03,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:53:03,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972267464] [2023-12-19 18:53:03,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:53:03,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:53:03,409 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:53:03,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284195016] [2023-12-19 18:53:03,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:53:03,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:53:03,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:53:03,410 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:53:03,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-19 18:53:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:53:03,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-19 18:53:03,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:53:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 18:53:03,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:53:03,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-19 18:53:03,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:53:03,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972267464] [2023-12-19 18:53:03,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:53:03,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284195016] [2023-12-19 18:53:03,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284195016] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:53:03,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 18:53:03,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 20 [2023-12-19 18:53:03,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513646132] [2023-12-19 18:53:03,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 18:53:03,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-19 18:53:03,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:53:03,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-19 18:53:03,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-12-19 18:53:03,911 INFO L87 Difference]: Start difference. First operand 107 states and 145 transitions. Second operand has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-19 18:53:07,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:53:07,636 INFO L93 Difference]: Finished difference Result 154 states and 208 transitions. [2023-12-19 18:53:07,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-19 18:53:07,636 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 31 [2023-12-19 18:53:07,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:53:07,638 INFO L225 Difference]: With dead ends: 154 [2023-12-19 18:53:07,638 INFO L226 Difference]: Without dead ends: 152 [2023-12-19 18:53:07,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=327, Invalid=1313, Unknown=0, NotChecked=0, Total=1640 [2023-12-19 18:53:07,639 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 177 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-19 18:53:07,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 216 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-19 18:53:07,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-12-19 18:53:07,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 137. [2023-12-19 18:53:07,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 96 states have (on average 1.25) internal successors, (120), 100 states have internal predecessors, (120), 33 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2023-12-19 18:53:07,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 185 transitions. [2023-12-19 18:53:07,666 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 185 transitions. Word has length 31 [2023-12-19 18:53:07,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:53:07,666 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 185 transitions. [2023-12-19 18:53:07,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-19 18:53:07,667 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 185 transitions. [2023-12-19 18:53:07,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-19 18:53:07,667 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:53:07,667 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:53:07,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-19 18:53:07,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-19 18:53:07,874 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:53:07,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:53:07,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1386643127, now seen corresponding path program 2 times [2023-12-19 18:53:07,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:53:07,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974134358] [2023-12-19 18:53:07,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:53:07,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:53:07,880 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:53:07,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633818360] [2023-12-19 18:53:07,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:53:07,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:53:07,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:53:07,881 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:53:07,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-19 18:53:07,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:53:07,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:53:07,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-19 18:53:07,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:53:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-19 18:53:07,927 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 18:53:07,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:53:07,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974134358] [2023-12-19 18:53:07,928 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:53:07,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633818360] [2023-12-19 18:53:07,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633818360] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:53:07,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 18:53:07,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 18:53:07,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204366515] [2023-12-19 18:53:07,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:53:07,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 18:53:07,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:53:07,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 18:53:07,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 18:53:07,929 INFO L87 Difference]: Start difference. First operand 137 states and 185 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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) [2023-12-19 18:53:07,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:53:07,993 INFO L93 Difference]: Finished difference Result 191 states and 264 transitions. [2023-12-19 18:53:07,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 18:53:07,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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 31 [2023-12-19 18:53:07,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:53:07,994 INFO L225 Difference]: With dead ends: 191 [2023-12-19 18:53:07,994 INFO L226 Difference]: Without dead ends: 128 [2023-12-19 18:53:07,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-19 18:53:07,995 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 19 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:53:07,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 135 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:53:07,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-12-19 18:53:08,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2023-12-19 18:53:08,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 65 states have internal predecessors, (73), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2023-12-19 18:53:08,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2023-12-19 18:53:08,013 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 31 [2023-12-19 18:53:08,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:53:08,014 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2023-12-19 18:53:08,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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) [2023-12-19 18:53:08,014 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2023-12-19 18:53:08,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-19 18:53:08,015 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:53:08,015 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:53:08,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-19 18:53:08,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:53:08,219 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:53:08,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:53:08,219 INFO L85 PathProgramCache]: Analyzing trace with hash 4291222, now seen corresponding path program 1 times [2023-12-19 18:53:08,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:53:08,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263207197] [2023-12-19 18:53:08,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:53:08,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:53:08,226 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:53:08,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941966825] [2023-12-19 18:53:08,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:53:08,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:53:08,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:53:08,227 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:53:08,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-19 18:53:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:53:08,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-19 18:53:08,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:53:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-19 18:53:08,294 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 18:53:08,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:53:08,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263207197] [2023-12-19 18:53:08,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:53:08,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941966825] [2023-12-19 18:53:08,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941966825] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:53:08,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 18:53:08,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 18:53:08,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884365672] [2023-12-19 18:53:08,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:53:08,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 18:53:08,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:53:08,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 18:53:08,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-19 18:53:08,295 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 18:53:08,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:53:08,360 INFO L93 Difference]: Finished difference Result 126 states and 170 transitions. [2023-12-19 18:53:08,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 18:53:08,360 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2023-12-19 18:53:08,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:53:08,361 INFO L225 Difference]: With dead ends: 126 [2023-12-19 18:53:08,361 INFO L226 Difference]: Without dead ends: 124 [2023-12-19 18:53:08,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-19 18:53:08,362 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:53:08,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 138 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:53:08,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-19 18:53:08,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 117. [2023-12-19 18:53:08,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 76 states have internal predecessors, (80), 39 states have call successors, (39), 8 states have call predecessors, (39), 8 states have return successors, (38), 32 states have call predecessors, (38), 38 states have call successors, (38) [2023-12-19 18:53:08,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 157 transitions. [2023-12-19 18:53:08,385 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 157 transitions. Word has length 36 [2023-12-19 18:53:08,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:53:08,385 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 157 transitions. [2023-12-19 18:53:08,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 18:53:08,386 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 157 transitions. [2023-12-19 18:53:08,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-19 18:53:08,386 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:53:08,386 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:53:08,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-19 18:53:08,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-19 18:53:08,591 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:53:08,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:53:08,591 INFO L85 PathProgramCache]: Analyzing trace with hash -303472484, now seen corresponding path program 1 times [2023-12-19 18:53:08,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:53:08,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949143054] [2023-12-19 18:53:08,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:53:08,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:53:08,613 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:53:08,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819024906] [2023-12-19 18:53:08,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:53:08,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:53:08,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:53:08,614 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:53:08,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-19 18:53:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:53:08,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-19 18:53:08,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:53:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-19 18:53:08,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:53:09,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:53:09,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949143054] [2023-12-19 18:53:09,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:53:09,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819024906] [2023-12-19 18:53:09,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819024906] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:53:09,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 18:53:09,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-12-19 18:53:09,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042799619] [2023-12-19 18:53:09,725 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 18:53:09,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-19 18:53:09,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:53:09,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-19 18:53:09,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=227, Unknown=1, NotChecked=0, Total=272 [2023-12-19 18:53:09,726 INFO L87 Difference]: Start difference. First operand 117 states and 157 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-19 18:53:11,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:53:11,943 INFO L93 Difference]: Finished difference Result 183 states and 261 transitions. [2023-12-19 18:53:11,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-19 18:53:11,943 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2023-12-19 18:53:11,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:53:11,944 INFO L225 Difference]: With dead ends: 183 [2023-12-19 18:53:11,944 INFO L226 Difference]: Without dead ends: 181 [2023-12-19 18:53:11,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=92, Invalid=459, Unknown=1, NotChecked=0, Total=552 [2023-12-19 18:53:11,945 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 57 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 25 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:53:11,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 230 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 326 Invalid, 2 Unknown, 0 Unchecked, 2.1s Time] [2023-12-19 18:53:11,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-12-19 18:53:11,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 132. [2023-12-19 18:53:11,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 75 states have (on average 1.16) internal successors, (87), 83 states have internal predecessors, (87), 47 states have call successors, (47), 9 states have call predecessors, (47), 9 states have return successors, (46), 39 states have call predecessors, (46), 46 states have call successors, (46) [2023-12-19 18:53:11,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 180 transitions. [2023-12-19 18:53:11,975 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 180 transitions. Word has length 36 [2023-12-19 18:53:11,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:53:11,975 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 180 transitions. [2023-12-19 18:53:11,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-19 18:53:11,975 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 180 transitions. [2023-12-19 18:53:11,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-19 18:53:11,976 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:53:11,976 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:53:11,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-19 18:53:12,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-19 18:53:12,180 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:53:12,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:53:12,181 INFO L85 PathProgramCache]: Analyzing trace with hash -303761292, now seen corresponding path program 1 times [2023-12-19 18:53:12,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:53:12,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476066873] [2023-12-19 18:53:12,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:53:12,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:53:12,186 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:53:12,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1133243685] [2023-12-19 18:53:12,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:53:12,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:53:12,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:53:12,188 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:53:12,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-19 18:53:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:53:12,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-19 18:53:12,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:53:12,732 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-19 18:53:12,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:53:13,545 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-19 18:53:13,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:53:13,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476066873] [2023-12-19 18:53:13,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:53:13,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133243685] [2023-12-19 18:53:13,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133243685] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:53:13,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 18:53:13,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-12-19 18:53:13,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573575455] [2023-12-19 18:53:13,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 18:53:13,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-19 18:53:13,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:53:13,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-19 18:53:13,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-12-19 18:53:13,547 INFO L87 Difference]: Start difference. First operand 132 states and 180 transitions. Second operand has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-19 18:53:21,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:53:21,540 INFO L93 Difference]: Finished difference Result 351 states and 499 transitions. [2023-12-19 18:53:21,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-19 18:53:21,541 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 48 [2023-12-19 18:53:21,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:53:21,542 INFO L225 Difference]: With dead ends: 351 [2023-12-19 18:53:21,542 INFO L226 Difference]: Without dead ends: 264 [2023-12-19 18:53:21,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=474, Invalid=2282, Unknown=0, NotChecked=0, Total=2756 [2023-12-19 18:53:21,544 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 169 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-12-19 18:53:21,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 352 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-12-19 18:53:21,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2023-12-19 18:53:21,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 213. [2023-12-19 18:53:21,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 134 states have (on average 1.1791044776119404) internal successors, (158), 140 states have internal predecessors, (158), 65 states have call successors, (65), 13 states have call predecessors, (65), 13 states have return successors, (64), 59 states have call predecessors, (64), 64 states have call successors, (64) [2023-12-19 18:53:21,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 287 transitions. [2023-12-19 18:53:21,618 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 287 transitions. Word has length 48 [2023-12-19 18:53:21,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:53:21,618 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 287 transitions. [2023-12-19 18:53:21,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-19 18:53:21,618 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 287 transitions. [2023-12-19 18:53:21,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-19 18:53:21,619 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:53:21,619 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:53:21,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-19 18:53:21,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-19 18:53:21,820 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:53:21,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:53:21,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1373066647, now seen corresponding path program 1 times [2023-12-19 18:53:21,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:53:21,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803584828] [2023-12-19 18:53:21,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:53:21,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:53:21,837 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:53:21,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392076858] [2023-12-19 18:53:21,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:53:21,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:53:21,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:53:21,838 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:53:21,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-19 18:53:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:53:21,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-19 18:53:21,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:53:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-12-19 18:53:21,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:53:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-19 18:53:22,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:53:22,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803584828] [2023-12-19 18:53:22,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:53:22,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392076858] [2023-12-19 18:53:22,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392076858] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:53:22,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 18:53:22,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 16 [2023-12-19 18:53:22,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129501779] [2023-12-19 18:53:22,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 18:53:22,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-19 18:53:22,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:53:22,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-19 18:53:22,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-12-19 18:53:22,065 INFO L87 Difference]: Start difference. First operand 213 states and 287 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 13 states have internal predecessors, (36), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2023-12-19 18:53:22,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:53:22,350 INFO L93 Difference]: Finished difference Result 235 states and 319 transitions. [2023-12-19 18:53:22,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-19 18:53:22,350 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 13 states have internal predecessors, (36), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 58 [2023-12-19 18:53:22,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:53:22,351 INFO L225 Difference]: With dead ends: 235 [2023-12-19 18:53:22,352 INFO L226 Difference]: Without dead ends: 233 [2023-12-19 18:53:22,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2023-12-19 18:53:22,352 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 50 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:53:22,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 196 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:53:22,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-12-19 18:53:22,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 217. [2023-12-19 18:53:22,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 137 states have (on average 1.1751824817518248) internal successors, (161), 143 states have internal predecessors, (161), 65 states have call successors, (65), 14 states have call predecessors, (65), 14 states have return successors, (64), 59 states have call predecessors, (64), 64 states have call successors, (64) [2023-12-19 18:53:22,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 290 transitions. [2023-12-19 18:53:22,439 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 290 transitions. Word has length 58 [2023-12-19 18:53:22,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:53:22,440 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 290 transitions. [2023-12-19 18:53:22,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 13 states have internal predecessors, (36), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2023-12-19 18:53:22,440 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 290 transitions. [2023-12-19 18:53:22,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-19 18:53:22,440 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:53:22,440 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:53:22,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-19 18:53:22,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-19 18:53:22,642 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:53:22,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:53:22,642 INFO L85 PathProgramCache]: Analyzing trace with hash 229048754, now seen corresponding path program 1 times [2023-12-19 18:53:22,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:53:22,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259745899] [2023-12-19 18:53:22,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:53:22,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:53:22,653 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:53:22,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651959479] [2023-12-19 18:53:22,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:53:22,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:53:22,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:53:22,656 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:53:22,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-19 18:53:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:53:22,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-19 18:53:22,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:53:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-19 18:53:23,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:53:23,634 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-19 18:53:23,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:53:23,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259745899] [2023-12-19 18:53:23,634 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:53:23,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651959479] [2023-12-19 18:53:23,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651959479] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:53:23,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 18:53:23,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2023-12-19 18:53:23,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333324209] [2023-12-19 18:53:23,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 18:53:23,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-19 18:53:23,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:53:23,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-19 18:53:23,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-12-19 18:53:23,636 INFO L87 Difference]: Start difference. First operand 217 states and 290 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 19 states have internal predecessors, (59), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-19 18:53:51,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 18:54:05,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.92s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 18:54:05,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:54:05,477 INFO L93 Difference]: Finished difference Result 362 states and 516 transitions. [2023-12-19 18:54:05,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-19 18:54:05,478 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 19 states have internal predecessors, (59), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 56 [2023-12-19 18:54:05,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:54:05,479 INFO L225 Difference]: With dead ends: 362 [2023-12-19 18:54:05,479 INFO L226 Difference]: Without dead ends: 360 [2023-12-19 18:54:05,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=685, Invalid=2975, Unknown=0, NotChecked=0, Total=3660 [2023-12-19 18:54:05,481 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 152 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2023-12-19 18:54:05,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 508 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 13.4s Time] [2023-12-19 18:54:05,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2023-12-19 18:54:05,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 225. [2023-12-19 18:54:05,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 143 states have (on average 1.167832167832168) internal successors, (167), 149 states have internal predecessors, (167), 65 states have call successors, (65), 16 states have call predecessors, (65), 16 states have return successors, (64), 59 states have call predecessors, (64), 64 states have call successors, (64) [2023-12-19 18:54:05,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 296 transitions. [2023-12-19 18:54:05,561 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 296 transitions. Word has length 56 [2023-12-19 18:54:05,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:54:05,562 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 296 transitions. [2023-12-19 18:54:05,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 19 states have internal predecessors, (59), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-19 18:54:05,562 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 296 transitions. [2023-12-19 18:54:05,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-19 18:54:05,562 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:54:05,562 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:54:05,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-19 18:54:05,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:54:05,763 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:54:05,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:54:05,763 INFO L85 PathProgramCache]: Analyzing trace with hash -525627411, now seen corresponding path program 2 times [2023-12-19 18:54:05,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:54:05,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476698012] [2023-12-19 18:54:05,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:54:05,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:54:05,771 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:54:05,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624922594] [2023-12-19 18:54:05,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:54:05,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:54:05,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:54:05,776 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:54:05,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-19 18:54:05,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:54:05,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:54:05,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-19 18:54:05,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:54:05,955 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-12-19 18:54:05,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:54:06,028 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-12-19 18:54:06,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:54:06,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476698012] [2023-12-19 18:54:06,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:54:06,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624922594] [2023-12-19 18:54:06,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624922594] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-19 18:54:06,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 18:54:06,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2023-12-19 18:54:06,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785285808] [2023-12-19 18:54:06,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:54:06,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 18:54:06,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:54:06,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 18:54:06,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-12-19 18:54:06,030 INFO L87 Difference]: Start difference. First operand 225 states and 296 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-19 18:54:06,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:54:06,151 INFO L93 Difference]: Finished difference Result 254 states and 341 transitions. [2023-12-19 18:54:06,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 18:54:06,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2023-12-19 18:54:06,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:54:06,152 INFO L225 Difference]: With dead ends: 254 [2023-12-19 18:54:06,152 INFO L226 Difference]: Without dead ends: 252 [2023-12-19 18:54:06,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2023-12-19 18:54:06,153 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:54:06,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 94 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:54:06,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-12-19 18:54:06,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 249. [2023-12-19 18:54:06,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 152 states have (on average 1.1776315789473684) internal successors, (179), 158 states have internal predecessors, (179), 79 states have call successors, (79), 17 states have call predecessors, (79), 17 states have return successors, (78), 73 states have call predecessors, (78), 78 states have call successors, (78) [2023-12-19 18:54:06,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 336 transitions. [2023-12-19 18:54:06,254 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 336 transitions. Word has length 61 [2023-12-19 18:54:06,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:54:06,254 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 336 transitions. [2023-12-19 18:54:06,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-19 18:54:06,254 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 336 transitions. [2023-12-19 18:54:06,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-19 18:54:06,255 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:54:06,255 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:54:06,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-19 18:54:06,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-19 18:54:06,459 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:54:06,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:54:06,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1791327615, now seen corresponding path program 3 times [2023-12-19 18:54:06,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:54:06,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639924367] [2023-12-19 18:54:06,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:54:06,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:54:06,472 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:54:06,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1094432435] [2023-12-19 18:54:06,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 18:54:06,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:54:06,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:54:06,473 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:54:06,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-19 18:54:06,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-19 18:54:06,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:54:06,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-19 18:54:06,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:54:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-19 18:54:06,532 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 18:54:06,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:54:06,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639924367] [2023-12-19 18:54:06,533 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:54:06,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094432435] [2023-12-19 18:54:06,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094432435] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:54:06,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 18:54:06,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 18:54:06,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493098119] [2023-12-19 18:54:06,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:54:06,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 18:54:06,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:54:06,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 18:54:06,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-19 18:54:06,534 INFO L87 Difference]: Start difference. First operand 249 states and 336 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-19 18:54:06,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:54:06,644 INFO L93 Difference]: Finished difference Result 422 states and 576 transitions. [2023-12-19 18:54:06,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 18:54:06,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 61 [2023-12-19 18:54:06,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:54:06,646 INFO L225 Difference]: With dead ends: 422 [2023-12-19 18:54:06,646 INFO L226 Difference]: Without dead ends: 266 [2023-12-19 18:54:06,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-19 18:54:06,647 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:54:06,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:54:06,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-12-19 18:54:06,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 260. [2023-12-19 18:54:06,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 163 states have (on average 1.177914110429448) internal successors, (192), 164 states have internal predecessors, (192), 79 states have call successors, (79), 17 states have call predecessors, (79), 17 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-12-19 18:54:06,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 349 transitions. [2023-12-19 18:54:06,750 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 349 transitions. Word has length 61 [2023-12-19 18:54:06,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:54:06,750 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 349 transitions. [2023-12-19 18:54:06,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-19 18:54:06,750 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 349 transitions. [2023-12-19 18:54:06,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-19 18:54:06,751 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:54:06,751 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:54:06,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-19 18:54:06,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-19 18:54:06,955 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:54:06,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:54:06,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1569947899, now seen corresponding path program 4 times [2023-12-19 18:54:06,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:54:06,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155193766] [2023-12-19 18:54:06,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:54:06,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:54:06,975 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:54:06,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022579506] [2023-12-19 18:54:06,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 18:54:06,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:54:06,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:54:06,979 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:54:06,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-19 18:54:07,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 18:54:07,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:54:07,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 59 conjunts are in the unsatisfiable core [2023-12-19 18:54:07,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:54:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-19 18:54:07,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:54:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-19 18:54:11,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:54:11,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155193766] [2023-12-19 18:54:11,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:54:11,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022579506] [2023-12-19 18:54:11,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022579506] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:54:11,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 18:54:11,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2023-12-19 18:54:11,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607278054] [2023-12-19 18:54:11,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 18:54:11,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-19 18:54:11,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:54:12,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-19 18:54:12,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=604, Unknown=1, NotChecked=0, Total=702 [2023-12-19 18:54:12,000 INFO L87 Difference]: Start difference. First operand 260 states and 349 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 24 states have internal predecessors, (57), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-12-19 18:54:25,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:54:25,190 INFO L93 Difference]: Finished difference Result 403 states and 546 transitions. [2023-12-19 18:54:25,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-19 18:54:25,191 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 24 states have internal predecessors, (57), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 61 [2023-12-19 18:54:25,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:54:25,192 INFO L225 Difference]: With dead ends: 403 [2023-12-19 18:54:25,192 INFO L226 Difference]: Without dead ends: 401 [2023-12-19 18:54:25,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=555, Invalid=2414, Unknown=1, NotChecked=0, Total=2970 [2023-12-19 18:54:25,193 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 215 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-12-19 18:54:25,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 467 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-12-19 18:54:25,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-12-19 18:54:25,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 344. [2023-12-19 18:54:25,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 214 states have (on average 1.1822429906542056) internal successors, (253), 215 states have internal predecessors, (253), 107 states have call successors, (107), 22 states have call predecessors, (107), 22 states have return successors, (106), 106 states have call predecessors, (106), 106 states have call successors, (106) [2023-12-19 18:54:25,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 466 transitions. [2023-12-19 18:54:25,364 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 466 transitions. Word has length 61 [2023-12-19 18:54:25,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:54:25,365 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 466 transitions. [2023-12-19 18:54:25,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 24 states have internal predecessors, (57), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-12-19 18:54:25,365 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 466 transitions. [2023-12-19 18:54:25,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-19 18:54:25,365 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:54:25,365 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:54:25,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-19 18:54:25,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-19 18:54:25,571 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:54:25,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:54:25,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1081992304, now seen corresponding path program 1 times [2023-12-19 18:54:25,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:54:25,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50487410] [2023-12-19 18:54:25,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:54:25,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:54:25,584 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:54:25,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442560764] [2023-12-19 18:54:25,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:54:25,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:54:25,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:54:25,585 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:54:25,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-19 18:54:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:54:25,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 76 conjunts are in the unsatisfiable core [2023-12-19 18:54:25,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:54:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-12-19 18:54:26,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:54:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-12-19 18:54:32,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:54:32,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50487410] [2023-12-19 18:54:32,886 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:54:32,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442560764] [2023-12-19 18:54:32,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442560764] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:54:32,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 18:54:32,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-12-19 18:54:32,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157650561] [2023-12-19 18:54:32,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 18:54:32,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-19 18:54:32,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:54:32,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-19 18:54:32,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2023-12-19 18:54:32,888 INFO L87 Difference]: Start difference. First operand 344 states and 466 transitions. Second operand has 33 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2023-12-19 18:54:52,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:54:52,192 INFO L93 Difference]: Finished difference Result 551 states and 766 transitions. [2023-12-19 18:54:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-12-19 18:54:52,193 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 75 [2023-12-19 18:54:52,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:54:52,195 INFO L225 Difference]: With dead ends: 551 [2023-12-19 18:54:52,195 INFO L226 Difference]: Without dead ends: 543 [2023-12-19 18:54:52,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=1290, Invalid=5516, Unknown=0, NotChecked=0, Total=6806 [2023-12-19 18:54:52,197 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 297 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-12-19 18:54:52,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 678 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-12-19 18:54:52,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2023-12-19 18:54:52,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 505. [2023-12-19 18:54:52,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 314 states have (on average 1.2006369426751593) internal successors, (377), 315 states have internal predecessors, (377), 163 states have call successors, (163), 27 states have call predecessors, (163), 27 states have return successors, (162), 162 states have call predecessors, (162), 162 states have call successors, (162) [2023-12-19 18:54:52,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 702 transitions. [2023-12-19 18:54:52,573 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 702 transitions. Word has length 75 [2023-12-19 18:54:52,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:54:52,573 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 702 transitions. [2023-12-19 18:54:52,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2023-12-19 18:54:52,573 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 702 transitions. [2023-12-19 18:54:52,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-19 18:54:52,574 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:54:52,574 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:54:52,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-19 18:54:52,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-19 18:54:52,780 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:54:52,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:54:52,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2018595463, now seen corresponding path program 2 times [2023-12-19 18:54:52,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:54:52,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83664298] [2023-12-19 18:54:52,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:54:52,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:54:52,789 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:54:52,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335387332] [2023-12-19 18:54:52,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:54:52,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:54:52,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:54:52,801 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:54:52,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-19 18:54:52,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:54:52,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:54:52,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-19 18:54:52,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:54:52,929 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-12-19 18:54:52,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:54:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-12-19 18:54:53,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:54:53,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83664298] [2023-12-19 18:54:53,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:54:53,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335387332] [2023-12-19 18:54:53,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335387332] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:54:53,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 18:54:53,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2023-12-19 18:54:53,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529703195] [2023-12-19 18:54:53,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 18:54:53,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-19 18:54:53,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:54:53,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-19 18:54:53,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-12-19 18:54:53,017 INFO L87 Difference]: Start difference. First operand 505 states and 702 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-19 18:54:53,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:54:53,839 INFO L93 Difference]: Finished difference Result 613 states and 859 transitions. [2023-12-19 18:54:53,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-19 18:54:53,840 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 83 [2023-12-19 18:54:53,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:54:53,842 INFO L225 Difference]: With dead ends: 613 [2023-12-19 18:54:53,843 INFO L226 Difference]: Without dead ends: 606 [2023-12-19 18:54:53,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 154 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2023-12-19 18:54:53,843 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 67 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 18:54:53,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 371 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 18:54:53,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2023-12-19 18:54:54,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 468. [2023-12-19 18:54:54,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 285 states have (on average 1.207017543859649) internal successors, (344), 286 states have internal predecessors, (344), 155 states have call successors, (155), 27 states have call predecessors, (155), 27 states have return successors, (154), 154 states have call predecessors, (154), 154 states have call successors, (154) [2023-12-19 18:54:54,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 653 transitions. [2023-12-19 18:54:54,201 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 653 transitions. Word has length 83 [2023-12-19 18:54:54,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:54:54,201 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 653 transitions. [2023-12-19 18:54:54,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-19 18:54:54,201 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 653 transitions. [2023-12-19 18:54:54,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-19 18:54:54,202 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:54:54,202 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:54:54,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-19 18:54:54,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:54:54,407 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:54:54,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:54:54,407 INFO L85 PathProgramCache]: Analyzing trace with hash -668510236, now seen corresponding path program 2 times [2023-12-19 18:54:54,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:54:54,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125342578] [2023-12-19 18:54:54,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:54:54,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:54:54,412 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:54:54,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1181414765] [2023-12-19 18:54:54,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:54:54,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:54:54,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:54:54,413 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:54:54,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-19 18:54:54,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:54:54,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:54:54,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 68 conjunts are in the unsatisfiable core [2023-12-19 18:54:54,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:54:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 29 proven. 58 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2023-12-19 18:54:55,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:55:00,028 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-19 18:55:00,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:55:00,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125342578] [2023-12-19 18:55:00,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:55:00,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181414765] [2023-12-19 18:55:00,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181414765] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:55:00,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 18:55:00,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2023-12-19 18:55:00,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173350255] [2023-12-19 18:55:00,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 18:55:00,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-19 18:55:00,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:55:00,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-19 18:55:00,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2023-12-19 18:55:00,030 INFO L87 Difference]: Start difference. First operand 468 states and 653 transitions. Second operand has 32 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2023-12-19 18:55:36,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:55:36,818 INFO L93 Difference]: Finished difference Result 906 states and 1284 transitions. [2023-12-19 18:55:36,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-12-19 18:55:36,819 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) Word has length 95 [2023-12-19 18:55:36,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:55:36,821 INFO L225 Difference]: With dead ends: 906 [2023-12-19 18:55:36,821 INFO L226 Difference]: Without dead ends: 710 [2023-12-19 18:55:36,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2224 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=1486, Invalid=6704, Unknown=0, NotChecked=0, Total=8190 [2023-12-19 18:55:36,823 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 249 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2023-12-19 18:55:36,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 522 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2023-12-19 18:55:36,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2023-12-19 18:55:37,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 638. [2023-12-19 18:55:37,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 382 states have (on average 1.212041884816754) internal successors, (463), 383 states have internal predecessors, (463), 223 states have call successors, (223), 32 states have call predecessors, (223), 32 states have return successors, (222), 222 states have call predecessors, (222), 222 states have call successors, (222) [2023-12-19 18:55:37,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 908 transitions. [2023-12-19 18:55:37,450 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 908 transitions. Word has length 95 [2023-12-19 18:55:37,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:55:37,450 INFO L495 AbstractCegarLoop]: Abstraction has 638 states and 908 transitions. [2023-12-19 18:55:37,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2023-12-19 18:55:37,451 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 908 transitions. [2023-12-19 18:55:37,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-12-19 18:55:37,452 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:55:37,452 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:55:37,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-19 18:55:37,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:55:37,657 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:55:37,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:55:37,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1888234833, now seen corresponding path program 1 times [2023-12-19 18:55:37,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:55:37,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719687943] [2023-12-19 18:55:37,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:55:37,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:55:37,663 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:55:37,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389140477] [2023-12-19 18:55:37,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:55:37,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:55:37,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:55:37,664 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:55:37,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-19 18:55:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:55:37,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-19 18:55:37,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:55:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2023-12-19 18:55:37,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:55:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2023-12-19 18:55:38,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:55:38,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719687943] [2023-12-19 18:55:38,624 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:55:38,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389140477] [2023-12-19 18:55:38,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389140477] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:55:38,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 18:55:38,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2023-12-19 18:55:38,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741953266] [2023-12-19 18:55:38,624 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 18:55:38,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-19 18:55:38,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:55:38,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-19 18:55:38,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2023-12-19 18:55:38,625 INFO L87 Difference]: Start difference. First operand 638 states and 908 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 19 states have internal predecessors, (52), 9 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2023-12-19 18:55:41,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:55:41,008 INFO L93 Difference]: Finished difference Result 1492 states and 2240 transitions. [2023-12-19 18:55:41,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-19 18:55:41,009 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 19 states have internal predecessors, (52), 9 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) Word has length 108 [2023-12-19 18:55:41,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:55:41,013 INFO L225 Difference]: With dead ends: 1492 [2023-12-19 18:55:41,013 INFO L226 Difference]: Without dead ends: 1175 [2023-12-19 18:55:41,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=399, Invalid=1581, Unknown=0, NotChecked=0, Total=1980 [2023-12-19 18:55:41,015 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 186 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 18:55:41,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 331 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 18:55:41,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2023-12-19 18:55:42,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1099. [2023-12-19 18:55:42,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 570 states have (on average 1.268421052631579) internal successors, (723), 575 states have internal predecessors, (723), 490 states have call successors, (490), 38 states have call predecessors, (490), 38 states have return successors, (489), 485 states have call predecessors, (489), 489 states have call successors, (489) [2023-12-19 18:55:42,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1702 transitions. [2023-12-19 18:55:42,425 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1702 transitions. Word has length 108 [2023-12-19 18:55:42,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:55:42,426 INFO L495 AbstractCegarLoop]: Abstraction has 1099 states and 1702 transitions. [2023-12-19 18:55:42,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 19 states have internal predecessors, (52), 9 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2023-12-19 18:55:42,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1702 transitions. [2023-12-19 18:55:42,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-12-19 18:55:42,428 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:55:42,428 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:55:42,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-19 18:55:42,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:55:42,633 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:55:42,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:55:42,633 INFO L85 PathProgramCache]: Analyzing trace with hash 954543051, now seen corresponding path program 2 times [2023-12-19 18:55:42,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:55:42,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726975471] [2023-12-19 18:55:42,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:55:42,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:55:42,642 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:55:42,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165803510] [2023-12-19 18:55:42,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:55:42,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:55:42,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:55:42,643 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:55:42,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-19 18:55:42,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:55:42,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:55:42,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 77 conjunts are in the unsatisfiable core [2023-12-19 18:55:42,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:55:43,735 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2023-12-19 18:55:43,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:55:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 26 proven. 55 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2023-12-19 18:55:45,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:55:45,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726975471] [2023-12-19 18:55:45,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:55:45,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165803510] [2023-12-19 18:55:45,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165803510] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:55:45,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 18:55:45,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2023-12-19 18:55:45,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277853131] [2023-12-19 18:55:45,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 18:55:45,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-19 18:55:45,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:55:45,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-19 18:55:45,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2023-12-19 18:55:45,803 INFO L87 Difference]: Start difference. First operand 1099 states and 1702 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 31 states have internal predecessors, (71), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2023-12-19 18:55:53,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 18:55:57,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 18:56:58,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 18:57:06,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:57:06,348 INFO L93 Difference]: Finished difference Result 1626 states and 2515 transitions. [2023-12-19 18:57:06,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-12-19 18:57:06,348 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 31 states have internal predecessors, (71), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) Word has length 108 [2023-12-19 18:57:06,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:57:06,355 INFO L225 Difference]: With dead ends: 1626 [2023-12-19 18:57:06,355 INFO L226 Difference]: Without dead ends: 1624 [2023-12-19 18:57:06,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 182 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 57.3s TimeCoverageRelationStatistics Valid=1161, Invalid=5001, Unknown=0, NotChecked=0, Total=6162 [2023-12-19 18:57:06,357 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 315 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 321 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.8s IncrementalHoareTripleChecker+Time [2023-12-19 18:57:06,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 786 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 1078 Invalid, 3 Unknown, 0 Unchecked, 22.8s Time] [2023-12-19 18:57:06,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2023-12-19 18:57:08,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1451. [2023-12-19 18:57:08,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 758 states have (on average 1.2678100263852243) internal successors, (961), 765 states have internal predecessors, (961), 642 states have call successors, (642), 50 states have call predecessors, (642), 50 states have return successors, (641), 635 states have call predecessors, (641), 641 states have call successors, (641) [2023-12-19 18:57:08,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 2244 transitions. [2023-12-19 18:57:08,277 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 2244 transitions. Word has length 108 [2023-12-19 18:57:08,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:57:08,280 INFO L495 AbstractCegarLoop]: Abstraction has 1451 states and 2244 transitions. [2023-12-19 18:57:08,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 31 states have internal predecessors, (71), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2023-12-19 18:57:08,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 2244 transitions. [2023-12-19 18:57:08,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-19 18:57:08,282 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:57:08,282 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:57:08,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-19 18:57:08,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:57:08,487 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:57:08,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:57:08,487 INFO L85 PathProgramCache]: Analyzing trace with hash 820273984, now seen corresponding path program 3 times [2023-12-19 18:57:08,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:57:08,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678155231] [2023-12-19 18:57:08,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:57:08,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:57:08,493 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:57:08,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724897019] [2023-12-19 18:57:08,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 18:57:08,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:57:08,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:57:08,498 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:57:08,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-19 18:57:08,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-19 18:57:08,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:57:08,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 77 conjunts are in the unsatisfiable core [2023-12-19 18:57:08,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:57:09,664 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2023-12-19 18:57:09,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:57:11,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:57:11,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678155231] [2023-12-19 18:57:11,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:57:11,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724897019] [2023-12-19 18:57:11,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724897019] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:57:11,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 18:57:11,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-12-19 18:57:11,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062599208] [2023-12-19 18:57:11,010 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 18:57:11,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-19 18:57:11,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:57:11,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-19 18:57:11,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2023-12-19 18:57:11,011 INFO L87 Difference]: Start difference. First operand 1451 states and 2244 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-12-19 18:57:14,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:57:14,197 INFO L93 Difference]: Finished difference Result 1707 states and 2635 transitions. [2023-12-19 18:57:14,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-19 18:57:14,198 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 122 [2023-12-19 18:57:14,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:57:14,203 INFO L225 Difference]: With dead ends: 1707 [2023-12-19 18:57:14,203 INFO L226 Difference]: Without dead ends: 1704 [2023-12-19 18:57:14,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=228, Invalid=1332, Unknown=0, NotChecked=0, Total=1560 [2023-12-19 18:57:14,204 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 84 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-19 18:57:14,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 307 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-19 18:57:14,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2023-12-19 18:57:16,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 1588. [2023-12-19 18:57:16,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 830 states have (on average 1.2650602409638554) internal successors, (1050), 838 states have internal predecessors, (1050), 700 states have call successors, (700), 57 states have call predecessors, (700), 57 states have return successors, (699), 692 states have call predecessors, (699), 699 states have call successors, (699) [2023-12-19 18:57:16,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 2449 transitions. [2023-12-19 18:57:16,368 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 2449 transitions. Word has length 122 [2023-12-19 18:57:16,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:57:16,368 INFO L495 AbstractCegarLoop]: Abstraction has 1588 states and 2449 transitions. [2023-12-19 18:57:16,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-12-19 18:57:16,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 2449 transitions. [2023-12-19 18:57:16,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-19 18:57:16,370 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:57:16,370 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:57:16,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-19 18:57:16,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:57:16,572 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:57:16,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:57:16,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1218339944, now seen corresponding path program 4 times [2023-12-19 18:57:16,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:57:16,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730825782] [2023-12-19 18:57:16,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:57:16,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:57:16,580 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:57:16,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1789992443] [2023-12-19 18:57:16,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 18:57:16,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:57:16,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:57:16,581 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:57:16,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-19 18:57:16,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 18:57:16,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:57:16,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 83 conjunts are in the unsatisfiable core [2023-12-19 18:57:16,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:57:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 32 proven. 59 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2023-12-19 18:57:17,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:57:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 32 proven. 56 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-12-19 18:57:24,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:57:24,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730825782] [2023-12-19 18:57:24,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:57:24,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789992443] [2023-12-19 18:57:24,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789992443] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:57:24,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 18:57:24,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2023-12-19 18:57:24,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885391422] [2023-12-19 18:57:24,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 18:57:24,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-19 18:57:24,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:57:24,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-19 18:57:24,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2023-12-19 18:57:24,378 INFO L87 Difference]: Start difference. First operand 1588 states and 2449 transitions. Second operand has 35 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 12 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 10 states have call predecessors, (36), 10 states have call successors, (36) [2023-12-19 18:58:57,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:58:57,029 INFO L93 Difference]: Finished difference Result 2256 states and 3527 transitions. [2023-12-19 18:58:57,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-12-19 18:58:57,030 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 12 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 10 states have call predecessors, (36), 10 states have call successors, (36) Word has length 122 [2023-12-19 18:58:57,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:58:57,044 INFO L225 Difference]: With dead ends: 2256 [2023-12-19 18:58:57,044 INFO L226 Difference]: Without dead ends: 2248 [2023-12-19 18:58:57,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4562 ImplicationChecksByTransitivity, 75.4s TimeCoverageRelationStatistics Valid=2519, Invalid=12980, Unknown=1, NotChecked=0, Total=15500 [2023-12-19 18:58:57,048 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 349 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 1996 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 2378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 1996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2023-12-19 18:58:57,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 1266 Invalid, 2378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 1996 Invalid, 0 Unknown, 0 Unchecked, 19.2s Time] [2023-12-19 18:58:57,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2023-12-19 18:58:59,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1862. [2023-12-19 18:58:59,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 971 states have (on average 1.2687950566426365) internal successors, (1232), 980 states have internal predecessors, (1232), 826 states have call successors, (826), 64 states have call predecessors, (826), 64 states have return successors, (825), 817 states have call predecessors, (825), 825 states have call successors, (825) [2023-12-19 18:58:59,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 2883 transitions. [2023-12-19 18:58:59,881 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 2883 transitions. Word has length 122 [2023-12-19 18:58:59,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:58:59,881 INFO L495 AbstractCegarLoop]: Abstraction has 1862 states and 2883 transitions. [2023-12-19 18:58:59,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 12 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 10 states have call predecessors, (36), 10 states have call successors, (36) [2023-12-19 18:58:59,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 2883 transitions. [2023-12-19 18:58:59,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-12-19 18:58:59,883 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:58:59,883 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:58:59,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-19 18:59:00,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:59:00,088 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:59:00,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:59:00,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1959315909, now seen corresponding path program 5 times [2023-12-19 18:59:00,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:59:00,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108174427] [2023-12-19 18:59:00,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:59:00,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:59:00,094 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 18:59:00,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435068488] [2023-12-19 18:59:00,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 18:59:00,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:59:00,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:59:00,095 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:59:00,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-19 18:59:00,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-12-19 18:59:00,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:59:00,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 104 conjunts are in the unsatisfiable core [2023-12-19 18:59:00,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:59:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 87 proven. 101 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2023-12-19 18:59:01,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:59:04,551 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 87 proven. 101 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2023-12-19 18:59:04,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:59:04,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108174427] [2023-12-19 18:59:04,551 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:59:04,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435068488] [2023-12-19 18:59:04,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435068488] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:59:04,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 18:59:04,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2023-12-19 18:59:04,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106312820] [2023-12-19 18:59:04,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 18:59:04,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-19 18:59:04,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:59:04,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-19 18:59:04,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2023-12-19 18:59:04,553 INFO L87 Difference]: Start difference. First operand 1862 states and 2883 transitions. Second operand has 40 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 12 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 10 states have call successors, (34) [2023-12-19 18:59:21,434 WARN L293 SmtUtils]: Spent 12.26s on a formula simplification. DAG size of input: 119 DAG size of output: 119 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:59:24,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.74s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 18:59:26,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 18:59:29,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 18:59:59,622 WARN L293 SmtUtils]: Spent 28.25s on a formula simplification. DAG size of input: 128 DAG size of output: 128 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 19:00:03,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:00:05,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:00:10,063 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse26 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse27 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse25 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse24 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|))) (let ((.cse32 (* |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (.cse31 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse30 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse6 (* .cse24 4)) (.cse7 (* .cse25 4)) (.cse20 (+ .cse26 .cse27)) (.cse22 (* 5 .cse24)) (.cse23 (* 5 .cse25)) (.cse17 (* .cse26 5)) (.cse18 (* .cse27 5)) (.cse34 (+ .cse26 .cse27 |c_ULTIMATE.start_main_~a~0#1|)) (.cse19 (+ .cse24 .cse25)) (.cse1 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (.cse14 (+ .cse24 .cse25 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse5 (not (= (+ |c_ULTIMATE.start_main_~c~0#1| .cse26 .cse27 .cse1 .cse0) .cse14))) (.cse10 (= .cse19 (+ .cse26 .cse27 .cse1 .cse0))) (.cse21 (not (= .cse34 .cse14))) (.cse13 (+ .cse17 .cse18)) (.cse2 (* .cse26 4)) (.cse3 (* .cse27 4)) (.cse4 (+ .cse22 .cse23)) (.cse12 (not (= .cse20 |c_ULTIMATE.start_main_~b~0#1|))) (.cse11 (* |c_ULTIMATE.start_main_~b~0#1| 4)) (.cse16 (+ .cse6 .cse7)) (.cse8 (* 4 .cse0)) (.cse9 (* .cse1 4)) (.cse15 (= |c_ULTIMATE.start_main_~b~0#1| 0)) (.cse28 (* .cse30 4)) (.cse29 (* .cse31 4)) (.cse33 (not (= |c_ULTIMATE.start_main_~v~0#1| .cse32)))) (and (or (= (+ (* 5 .cse0) (* 5 .cse1) .cse2 .cse3) .cse4) .cse5 (not (= (+ .cse6 |c_ULTIMATE.start_main_~c~0#1| .cse7) (+ .cse8 .cse9 .cse2 .cse3))) .cse10) (or (not (= |c_ULTIMATE.start_main_~a~0#1| .cse11)) .cse12 (= .cse13 .cse14) .cse15) (or (not (= .cse16 (+ .cse8 .cse9 .cse2 |c_ULTIMATE.start_main_~b~0#1| .cse3))) .cse5 (= .cse16 (+ .cse17 .cse8 .cse9 .cse18)) .cse10) (or (= .cse16 .cse13) (not (= .cse16 (+ .cse2 |c_ULTIMATE.start_main_~b~0#1| .cse3))) (= .cse19 .cse20) .cse21) (or .cse21 (not (= (+ .cse22 .cse23 |c_ULTIMATE.start_main_~b~0#1|) .cse13)) (= (+ .cse2 .cse3) .cse4) (< .cse20 (+ .cse24 .cse25 1))) (or .cse12 (not (= |c_ULTIMATE.start_main_~c~0#1| .cse11)) (= (+ .cse17 .cse1 .cse18 .cse0) .cse14)) (or (= (+ .cse26 .cse27 .cse8 .cse9 .cse28 .cse29) .cse16) (not (= (+ .cse30 |c_ULTIMATE.start_main_~c~0#1| .cse31 .cse1 .cse0) (+ .cse24 .cse25 |c_ULTIMATE.start_main_~v~0#1|))) (not (= (+ .cse8 .cse9 .cse28 .cse29 |c_ULTIMATE.start_main_~b~0#1|) .cse16)) (= (+ .cse30 .cse31 .cse1 .cse0) .cse19)) (or (= .cse14 (+ .cse26 (* .cse30 2) .cse27 (* 2 .cse31) .cse1 .cse0)) (not (= |c_ULTIMATE.start_main_~c~0#1| (* 2 .cse32))) .cse33) (or (not (= .cse16 (+ .cse8 .cse9 |c_ULTIMATE.start_main_~b~0#1|))) (= .cse16 (+ .cse26 .cse27 .cse8 .cse9)) (= .cse19 (+ .cse1 .cse0)) (not (= .cse19 (+ |c_ULTIMATE.start_main_~c~0#1| .cse1 .cse0)))) (or (not .cse15) (= .cse19 .cse34)) (or (= .cse14 (+ .cse26 .cse27 .cse28 .cse1 .cse29 .cse0)) (not (= |c_ULTIMATE.start_main_~c~0#1| (* 4 .cse32))) .cse33))))) is different from false [2023-12-19 19:00:11,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:00:24,931 WARN L293 SmtUtils]: Spent 8.49s on a formula simplification. DAG size of input: 117 DAG size of output: 117 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 19:00:28,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:01:12,230 WARN L293 SmtUtils]: Spent 24.55s on a formula simplification. DAG size of input: 131 DAG size of output: 131 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 19:01:16,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:01:21,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:01:26,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:01:40,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:01:50,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:01:52,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:02:20,462 WARN L293 SmtUtils]: Spent 10.11s on a formula simplification that was a NOOP. DAG size: 111 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 19:02:36,412 WARN L293 SmtUtils]: Spent 5.64s on a formula simplification. DAG size of input: 114 DAG size of output: 114 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 19:02:58,753 WARN L293 SmtUtils]: Spent 17.87s on a formula simplification. DAG size of input: 127 DAG size of output: 127 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 19:03:00,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:03:35,090 WARN L293 SmtUtils]: Spent 16.49s on a formula simplification. DAG size of input: 126 DAG size of output: 126 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 19:03:39,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.94s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:03:43,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:03:45,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:04:22,718 WARN L293 SmtUtils]: Spent 24.64s on a formula simplification. DAG size of input: 136 DAG size of output: 134 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 19:04:29,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:04:41,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:04:43,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:04:56,182 WARN L293 SmtUtils]: Spent 11.05s on a formula simplification. DAG size of input: 95 DAG size of output: 93 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 19:05:19,464 WARN L293 SmtUtils]: Spent 8.98s on a formula simplification. DAG size of input: 119 DAG size of output: 119 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 19:05:25,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:05:29,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:05:34,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:05:37,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:05:54,960 WARN L293 SmtUtils]: Spent 13.47s on a formula simplification. DAG size of input: 130 DAG size of output: 128 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 19:06:00,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:06:15,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.23s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:06:27,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:06:27,588 INFO L93 Difference]: Finished difference Result 2527 states and 3946 transitions. [2023-12-19 19:06:27,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-12-19 19:06:27,589 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 12 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 10 states have call successors, (34) Word has length 127 [2023-12-19 19:06:27,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:06:27,597 INFO L225 Difference]: With dead ends: 2527 [2023-12-19 19:06:27,597 INFO L226 Difference]: Without dead ends: 2523 [2023-12-19 19:06:27,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2764 ImplicationChecksByTransitivity, 340.9s TimeCoverageRelationStatistics Valid=2274, Invalid=8427, Unknown=15, NotChecked=204, Total=10920 [2023-12-19 19:06:27,598 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 439 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 1613 mSolverCounterSat, 494 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 2157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 1613 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 98.4s IncrementalHoareTripleChecker+Time [2023-12-19 19:06:27,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 1100 Invalid, 2157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 1613 Invalid, 12 Unknown, 38 Unchecked, 98.4s Time] [2023-12-19 19:06:27,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2523 states. [2023-12-19 19:06:32,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2523 to 2054. [2023-12-19 19:06:32,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 1061 states have (on average 1.2714420358152687) internal successors, (1349), 1072 states have internal predecessors, (1349), 918 states have call successors, (918), 74 states have call predecessors, (918), 74 states have return successors, (917), 907 states have call predecessors, (917), 917 states have call successors, (917) [2023-12-19 19:06:32,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 3184 transitions. [2023-12-19 19:06:32,240 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 3184 transitions. Word has length 127 [2023-12-19 19:06:32,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:06:32,240 INFO L495 AbstractCegarLoop]: Abstraction has 2054 states and 3184 transitions. [2023-12-19 19:06:32,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 12 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 10 states have call successors, (34) [2023-12-19 19:06:32,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 3184 transitions. [2023-12-19 19:06:32,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-19 19:06:32,243 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:06:32,243 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:06:32,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-19 19:06:32,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-19 19:06:32,459 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:06:32,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:06:32,459 INFO L85 PathProgramCache]: Analyzing trace with hash -173862775, now seen corresponding path program 6 times [2023-12-19 19:06:32,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:06:32,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025809573] [2023-12-19 19:06:32,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:06:32,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:06:32,465 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:06:32,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524217988] [2023-12-19 19:06:32,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 19:06:32,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:06:32,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:06:32,466 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 19:06:32,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-19 19:06:32,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-19 19:06:32,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:06:32,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 99 conjunts are in the unsatisfiable core [2023-12-19 19:06:32,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:06:37,241 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 69 proven. 132 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2023-12-19 19:06:37,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:06:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 120 proven. 69 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2023-12-19 19:06:48,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:06:48,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025809573] [2023-12-19 19:06:48,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:06:48,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524217988] [2023-12-19 19:06:48,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524217988] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:06:48,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:06:48,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16] total 39 [2023-12-19 19:06:48,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272050568] [2023-12-19 19:06:48,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:06:48,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-19 19:06:48,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:06:48,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-19 19:06:48,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2023-12-19 19:06:48,402 INFO L87 Difference]: Start difference. First operand 2054 states and 3184 transitions. Second operand has 39 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 36 states have internal predecessors, (84), 14 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (35), 11 states have call predecessors, (35), 12 states have call successors, (35) [2023-12-19 19:07:16,808 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 [] Received shutdown request... [2023-12-19 19:07:34,095 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-19 19:07:34,104 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-19 19:07:35,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-19 19:07:35,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-12-19 19:07:35,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 36.0s TimeCoverageRelationStatistics Valid=1022, Invalid=5298, Unknown=0, NotChecked=0, Total=6320 [2023-12-19 19:07:35,241 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 266 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 172 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2023-12-19 19:07:35,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 865 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1253 Invalid, 1 Unknown, 0 Unchecked, 12.8s Time] [2023-12-19 19:07:35,242 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-19 19:07:35,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-12-19 19:07:35,242 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (2054states) and FLOYD_HOARE automaton (currently 51 states, 39 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. [2023-12-19 19:07:35,245 INFO L445 BasicCegarLoop]: Path program histogram: [6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:07:35,247 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-19 19:07:35,248 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.12 07:07:35 BoogieIcfgContainer [2023-12-19 19:07:35,248 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-19 19:07:35,248 INFO L158 Benchmark]: Toolchain (without parser) took 876401.99ms. Allocated memory was 223.3MB in the beginning and 822.1MB in the end (delta: 598.7MB). Free memory was 162.2MB in the beginning and 458.2MB in the end (delta: -295.9MB). Peak memory consumption was 304.4MB. Max. memory is 8.0GB. [2023-12-19 19:07:35,249 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 223.3MB. Free memory was 173.9MB in the beginning and 173.7MB in the end (delta: 159.6kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-19 19:07:35,249 INFO L158 Benchmark]: CACSL2BoogieTranslator took 161.08ms. Allocated memory is still 223.3MB. Free memory was 161.9MB in the beginning and 150.7MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-19 19:07:35,249 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.42ms. Allocated memory is still 223.3MB. Free memory was 150.7MB in the beginning and 149.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-19 19:07:35,249 INFO L158 Benchmark]: Boogie Preprocessor took 25.83ms. Allocated memory is still 223.3MB. Free memory was 149.1MB in the beginning and 147.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-19 19:07:35,249 INFO L158 Benchmark]: RCFGBuilder took 278.65ms. Allocated memory was 223.3MB in the beginning and 273.7MB in the end (delta: 50.3MB). Free memory was 147.3MB in the beginning and 235.9MB in the end (delta: -88.6MB). Peak memory consumption was 12.8MB. Max. memory is 8.0GB. [2023-12-19 19:07:35,249 INFO L158 Benchmark]: TraceAbstraction took 875906.12ms. Allocated memory was 273.7MB in the beginning and 822.1MB in the end (delta: 548.4MB). Free memory was 234.9MB in the beginning and 458.2MB in the end (delta: -223.3MB). Peak memory consumption was 325.1MB. Max. memory is 8.0GB. [2023-12-19 19:07:35,250 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 223.3MB. Free memory was 173.9MB in the beginning and 173.7MB in the end (delta: 159.6kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 161.08ms. Allocated memory is still 223.3MB. Free memory was 161.9MB in the beginning and 150.7MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.42ms. Allocated memory is still 223.3MB. Free memory was 150.7MB in the beginning and 149.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.83ms. Allocated memory is still 223.3MB. Free memory was 149.1MB in the beginning and 147.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 278.65ms. Allocated memory was 223.3MB in the beginning and 273.7MB in the end (delta: 50.3MB). Free memory was 147.3MB in the beginning and 235.9MB in the end (delta: -88.6MB). Peak memory consumption was 12.8MB. Max. memory is 8.0GB. * TraceAbstraction took 875906.12ms. Allocated memory was 273.7MB in the beginning and 822.1MB in the end (delta: 548.4MB). Free memory was 234.9MB in the beginning and 458.2MB in the end (delta: -223.3MB). Peak memory consumption was 325.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 13). Cancelled while NwaCegarLoop was constructing difference of abstraction (2054states) and FLOYD_HOARE automaton (currently 51 states, 39 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 875.9s, OverallIterations: 26, TraceHistogramMax: 17, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 796.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 mSolverCounterUnknown, 3472 SdHoareTripleChecker+Valid, 195.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3392 mSDsluCounter, 9659 SdHoareTripleChecker+Invalid, 194.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 38 IncrementalHoareTripleChecker+Unchecked, 8741 mSDsCounter, 3028 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13205 IncrementalHoareTripleChecker+Invalid, 16289 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3028 mSolverCounterUnsat, 918 mSDtfsCounter, 13205 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3410 GetRequests, 2391 SyntacticMatches, 15 SemanticMatches, 1003 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 18199 ImplicationChecksByTransitivity, 609.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2054occurred in iteration=25, InterpolantAutomatonStates: 678, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 15.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 1899 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 57.1s InterpolantComputationTime, 1628 NumberOfCodeBlocks, 1519 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 2781 ConstructedInterpolants, 3 QuantifiedInterpolants, 29668 SizeOfPredicates, 120 NumberOfNonLiveVariables, 4074 ConjunctsInSsa, 1016 ConjunctsInUnsatCore, 42 InterpolantComputations, 8 PerfectInterpolantSequences, 6912/8013 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown