/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-scaling/egcd2-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 19:54:37,668 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 19:54:37,724 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 19:54:37,727 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 19:54:37,728 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 19:54:37,750 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 19:54:37,751 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 19:54:37,751 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 19:54:37,752 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 19:54:37,754 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 19:54:37,755 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 19:54:37,755 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 19:54:37,755 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 19:54:37,756 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 19:54:37,756 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 19:54:37,756 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 19:54:37,756 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 19:54:37,757 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 19:54:37,757 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 19:54:37,758 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 19:54:37,758 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 19:54:37,758 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 19:54:37,758 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 19:54:37,758 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 19:54:37,759 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 19:54:37,759 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 19:54:37,759 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 19:54:37,759 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 19:54:37,759 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 19:54:37,760 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 19:54:37,760 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 19:54:37,760 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 19:54:37,761 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 19:54:37,761 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 19:54:37,761 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 19:54:37,761 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 19:54:37,761 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 19:54:37,761 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 19:54:37,762 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 19:54:37,762 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 19:54:37,762 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 19:54:37,762 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 19:54:37,762 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 19:54:37,762 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 19:54:37,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 19:54:37,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 19:54:37,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 19:54:37,926 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 19:54:37,926 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 19:54:37,927 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c [2023-12-19 19:54:38,963 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 19:54:39,067 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 19:54:39,068 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c [2023-12-19 19:54:39,073 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1c8a27ca/166ecec4423a48279a3217cf89d3b1bb/FLAGc6c58e072 [2023-12-19 19:54:39,084 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1c8a27ca/166ecec4423a48279a3217cf89d3b1bb [2023-12-19 19:54:39,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 19:54:39,087 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 19:54:39,089 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 19:54:39,093 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 19:54:39,096 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 19:54:39,097 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 07:54:39" (1/1) ... [2023-12-19 19:54:39,097 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d6effd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:39, skipping insertion in model container [2023-12-19 19:54:39,098 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 07:54:39" (1/1) ... [2023-12-19 19:54:39,116 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 19:54:39,232 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2023-12-19 19:54:39,251 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 19:54:39,259 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 19:54:39,268 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2023-12-19 19:54:39,278 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 19:54:39,287 INFO L206 MainTranslator]: Completed translation [2023-12-19 19:54:39,288 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:39 WrapperNode [2023-12-19 19:54:39,288 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 19:54:39,289 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 19:54:39,289 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 19:54:39,289 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 19:54:39,293 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:39" (1/1) ... [2023-12-19 19:54:39,298 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:39" (1/1) ... [2023-12-19 19:54:39,310 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 79 [2023-12-19 19:54:39,310 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 19:54:39,310 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 19:54:39,310 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 19:54:39,310 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 19:54:39,316 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:39" (1/1) ... [2023-12-19 19:54:39,316 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:39" (1/1) ... [2023-12-19 19:54:39,317 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:39" (1/1) ... [2023-12-19 19:54:39,325 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 19:54:39,325 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:39" (1/1) ... [2023-12-19 19:54:39,325 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:39" (1/1) ... [2023-12-19 19:54:39,327 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:39" (1/1) ... [2023-12-19 19:54:39,329 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:39" (1/1) ... [2023-12-19 19:54:39,330 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:39" (1/1) ... [2023-12-19 19:54:39,330 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:39" (1/1) ... [2023-12-19 19:54:39,331 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 19:54:39,332 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 19:54:39,332 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 19:54:39,332 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 19:54:39,333 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:39" (1/1) ... [2023-12-19 19:54:39,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 19:54:39,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:39,353 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 19:54:39,355 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 19:54:39,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 19:54:39,374 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-19 19:54:39,374 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-19 19:54:39,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 19:54:39,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 19:54:39,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 19:54:39,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-19 19:54:39,375 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-19 19:54:39,414 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 19:54:39,415 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 19:54:39,516 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 19:54:39,532 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 19:54:39,532 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-19 19:54:39,533 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 07:54:39 BoogieIcfgContainer [2023-12-19 19:54:39,533 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 19:54:39,534 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 19:54:39,534 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 19:54:39,536 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 19:54:39,536 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 07:54:39" (1/3) ... [2023-12-19 19:54:39,537 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4882d273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 07:54:39, skipping insertion in model container [2023-12-19 19:54:39,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:39" (2/3) ... [2023-12-19 19:54:39,537 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4882d273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 07:54:39, skipping insertion in model container [2023-12-19 19:54:39,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 07:54:39" (3/3) ... [2023-12-19 19:54:39,538 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound20.c [2023-12-19 19:54:39,549 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 19:54:39,549 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 19:54:39,578 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 19:54:39,582 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;@30657162, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 19:54:39,582 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 19:54:39,585 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 16 states have (on average 1.5625) internal successors, (25), 18 states have internal predecessors, (25), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-19 19:54:39,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-19 19:54:39,590 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:39,590 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:54:39,591 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:39,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:39,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1865535902, now seen corresponding path program 1 times [2023-12-19 19:54:39,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:39,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074129568] [2023-12-19 19:54:39,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:39,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:39,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:54:39,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:54:39,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074129568] [2023-12-19 19:54:39,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-19 19:54:39,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923477814] [2023-12-19 19:54:39,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:39,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:39,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:39,717 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 19:54:39,717 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 19:54:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:54:39,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-19 19:54:39,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-19 19:54:39,789 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 19:54:39,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923477814] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 19:54:39,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 19:54:39,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 19:54:39,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846808340] [2023-12-19 19:54:39,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 19:54:39,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-19 19:54:39,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:54:39,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-19 19:54:39,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 19:54:39,821 INFO L87 Difference]: Start difference. First operand has 32 states, 16 states have (on average 1.5625) internal successors, (25), 18 states have internal predecessors, (25), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-19 19:54:39,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:54:39,858 INFO L93 Difference]: Finished difference Result 62 states and 107 transitions. [2023-12-19 19:54:39,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-19 19:54:39,859 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2023-12-19 19:54:39,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:54:39,864 INFO L225 Difference]: With dead ends: 62 [2023-12-19 19:54:39,864 INFO L226 Difference]: Without dead ends: 30 [2023-12-19 19:54:39,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 37 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 19:54:39,869 INFO L413 NwaCegarLoop]: 41 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, 41 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 19:54:39,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 19:54:39,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-19 19:54:39,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-12-19 19:54:39,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-19 19:54:39,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2023-12-19 19:54:39,892 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 38 [2023-12-19 19:54:39,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:54:39,893 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2023-12-19 19:54:39,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-19 19:54:39,893 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2023-12-19 19:54:39,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-19 19:54:39,894 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:39,894 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:54:39,906 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 19:54:40,099 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 19:54:40,100 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:40,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:40,101 INFO L85 PathProgramCache]: Analyzing trace with hash -279596905, now seen corresponding path program 1 times [2023-12-19 19:54:40,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:40,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298250568] [2023-12-19 19:54:40,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:40,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:40,131 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:54:40,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260967878] [2023-12-19 19:54:40,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:40,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:40,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:40,147 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 19:54:40,160 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 19:54:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:54:40,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 19:54:40,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-19 19:54:40,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:54:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-19 19:54:40,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:54:40,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298250568] [2023-12-19 19:54:40,386 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:54:40,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260967878] [2023-12-19 19:54:40,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260967878] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:54:40,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:54:40,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-12-19 19:54:40,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730561247] [2023-12-19 19:54:40,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:54:40,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 19:54:40,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:54:40,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 19:54:40,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-19 19:54:40,389 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-19 19:54:40,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:54:40,463 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2023-12-19 19:54:40,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 19:54:40,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2023-12-19 19:54:40,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:54:40,465 INFO L225 Difference]: With dead ends: 47 [2023-12-19 19:54:40,465 INFO L226 Difference]: Without dead ends: 39 [2023-12-19 19:54:40,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-19 19:54:40,466 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 19:54:40,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 134 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 19:54:40,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-19 19:54:40,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2023-12-19 19:54:40,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-19 19:54:40,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2023-12-19 19:54:40,473 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 39 [2023-12-19 19:54:40,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:54:40,473 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2023-12-19 19:54:40,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-19 19:54:40,473 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2023-12-19 19:54:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-19 19:54:40,474 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:40,474 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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 19:54:40,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-19 19:54:40,681 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 19:54:40,681 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:40,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:40,682 INFO L85 PathProgramCache]: Analyzing trace with hash -76887146, now seen corresponding path program 1 times [2023-12-19 19:54:40,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:40,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345199660] [2023-12-19 19:54:40,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:40,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:40,695 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:54:40,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370457943] [2023-12-19 19:54:40,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:40,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:40,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:40,696 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 19:54:40,705 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 19:54:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:54:40,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-19 19:54:40,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-19 19:54:40,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:54:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-19 19:54:40,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:54:40,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345199660] [2023-12-19 19:54:40,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:54:40,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370457943] [2023-12-19 19:54:40,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370457943] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-19 19:54:40,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:54:40,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-12-19 19:54:40,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780416158] [2023-12-19 19:54:40,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 19:54:40,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 19:54:40,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:54:40,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 19:54:40,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-12-19 19:54:40,868 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-19 19:54:40,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:54:40,902 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2023-12-19 19:54:40,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 19:54:40,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2023-12-19 19:54:40,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:54:40,903 INFO L225 Difference]: With dead ends: 38 [2023-12-19 19:54:40,903 INFO L226 Difference]: Without dead ends: 36 [2023-12-19 19:54:40,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-12-19 19:54:40,905 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 19:54:40,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 19:54:40,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-19 19:54:40,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-12-19 19:54:40,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-19 19:54:40,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2023-12-19 19:54:40,912 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 40 [2023-12-19 19:54:40,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:54:40,912 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2023-12-19 19:54:40,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-19 19:54:40,913 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2023-12-19 19:54:40,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-19 19:54:40,914 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:40,914 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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 19:54:40,921 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 19:54:41,118 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 19:54:41,121 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:41,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:41,122 INFO L85 PathProgramCache]: Analyzing trace with hash 345761675, now seen corresponding path program 1 times [2023-12-19 19:54:41,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:41,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930460660] [2023-12-19 19:54:41,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:41,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:41,157 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:54:41,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638194576] [2023-12-19 19:54:41,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:41,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:41,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:41,158 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 19:54:41,165 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 19:54:41,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:54:41,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-19 19:54:41,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-19 19:54:41,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:54:41,501 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-19 19:54:41,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:54:41,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930460660] [2023-12-19 19:54:41,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:54:41,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638194576] [2023-12-19 19:54:41,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638194576] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-19 19:54:41,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:54:41,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 15 [2023-12-19 19:54:41,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275739225] [2023-12-19 19:54:41,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 19:54:41,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 19:54:41,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:54:41,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 19:54:41,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-12-19 19:54:41,503 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-19 19:54:41,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:54:41,542 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2023-12-19 19:54:41,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 19:54:41,543 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2023-12-19 19:54:41,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:54:41,543 INFO L225 Difference]: With dead ends: 49 [2023-12-19 19:54:41,543 INFO L226 Difference]: Without dead ends: 47 [2023-12-19 19:54:41,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-12-19 19:54:41,544 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 19:54:41,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 166 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 19:54:41,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-19 19:54:41,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2023-12-19 19:54:41,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-19 19:54:41,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-12-19 19:54:41,552 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 45 [2023-12-19 19:54:41,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:54:41,553 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-12-19 19:54:41,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-19 19:54:41,553 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-12-19 19:54:41,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-19 19:54:41,554 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:41,554 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:54:41,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 19:54:41,758 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 19:54:41,758 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:41,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:41,759 INFO L85 PathProgramCache]: Analyzing trace with hash -954985354, now seen corresponding path program 1 times [2023-12-19 19:54:41,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:41,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220771957] [2023-12-19 19:54:41,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:41,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:41,767 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:54:41,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408769547] [2023-12-19 19:54:41,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:41,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:41,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:41,777 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 19:54:41,778 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 19:54:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:54:41,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-19 19:54:41,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:41,988 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-12-19 19:54:41,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:54:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-12-19 19:54:42,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:54:42,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220771957] [2023-12-19 19:54:42,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:54:42,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408769547] [2023-12-19 19:54:42,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408769547] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-19 19:54:42,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:54:42,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-12-19 19:54:42,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595080211] [2023-12-19 19:54:42,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 19:54:42,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 19:54:42,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:54:42,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 19:54:42,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-19 19:54:42,063 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 19:54:42,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:54:42,107 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2023-12-19 19:54:42,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 19:54:42,107 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 50 [2023-12-19 19:54:42,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:54:42,108 INFO L225 Difference]: With dead ends: 53 [2023-12-19 19:54:42,108 INFO L226 Difference]: Without dead ends: 51 [2023-12-19 19:54:42,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-12-19 19:54:42,109 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 19:54:42,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 127 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 19:54:42,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-19 19:54:42,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2023-12-19 19:54:42,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-19 19:54:42,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2023-12-19 19:54:42,117 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 50 [2023-12-19 19:54:42,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:54:42,118 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2023-12-19 19:54:42,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 19:54:42,118 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2023-12-19 19:54:42,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-19 19:54:42,118 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:42,119 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:54:42,130 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 19:54:42,323 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 19:54:42,324 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:42,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:42,324 INFO L85 PathProgramCache]: Analyzing trace with hash -2047387093, now seen corresponding path program 1 times [2023-12-19 19:54:42,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:42,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189191211] [2023-12-19 19:54:42,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:42,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:42,346 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:54:42,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [404284039] [2023-12-19 19:54:42,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:42,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:42,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:42,363 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 19:54:42,380 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 19:54:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:54:42,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-19 19:54:42,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-19 19:54:42,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:54:42,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:54:42,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189191211] [2023-12-19 19:54:42,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:54:42,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404284039] [2023-12-19 19:54:42,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404284039] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 19:54:42,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:54:42,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-12-19 19:54:42,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971632880] [2023-12-19 19:54:42,597 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 19:54:42,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 19:54:42,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:54:42,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 19:54:42,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-12-19 19:54:42,598 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-19 19:54:42,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:54:42,680 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2023-12-19 19:54:42,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 19:54:42,680 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2023-12-19 19:54:42,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:54:42,681 INFO L225 Difference]: With dead ends: 57 [2023-12-19 19:54:42,681 INFO L226 Difference]: Without dead ends: 55 [2023-12-19 19:54:42,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-12-19 19:54:42,682 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 19:54:42,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 146 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 19:54:42,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-19 19:54:42,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2023-12-19 19:54:42,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-19 19:54:42,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2023-12-19 19:54:42,691 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 55 [2023-12-19 19:54:42,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:54:42,691 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2023-12-19 19:54:42,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-19 19:54:42,691 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2023-12-19 19:54:42,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-19 19:54:42,692 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:42,692 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:54:42,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-19 19:54:42,897 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 19:54:42,897 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:42,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:42,897 INFO L85 PathProgramCache]: Analyzing trace with hash 392643903, now seen corresponding path program 1 times [2023-12-19 19:54:42,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:42,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265533953] [2023-12-19 19:54:42,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:42,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:42,919 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:54:42,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278661626] [2023-12-19 19:54:42,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:42,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:42,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:42,937 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 19:54:42,960 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 19:54:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:54:43,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-19 19:54:43,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-12-19 19:54:43,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:54:43,106 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-12-19 19:54:43,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:54:43,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265533953] [2023-12-19 19:54:43,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:54:43,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278661626] [2023-12-19 19:54:43,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278661626] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:54:43,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:54:43,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-12-19 19:54:43,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873270607] [2023-12-19 19:54:43,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:54:43,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-19 19:54:43,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:54:43,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-19 19:54:43,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-12-19 19:54:43,114 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-19 19:54:43,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:54:43,260 INFO L93 Difference]: Finished difference Result 101 states and 141 transitions. [2023-12-19 19:54:43,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 19:54:43,260 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2023-12-19 19:54:43,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:54:43,261 INFO L225 Difference]: With dead ends: 101 [2023-12-19 19:54:43,261 INFO L226 Difference]: Without dead ends: 93 [2023-12-19 19:54:43,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 115 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 19:54:43,262 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 36 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 19:54:43,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 281 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 19:54:43,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-12-19 19:54:43,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2023-12-19 19:54:43,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-12-19 19:54:43,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2023-12-19 19:54:43,279 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 64 [2023-12-19 19:54:43,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:54:43,279 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2023-12-19 19:54:43,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-19 19:54:43,279 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2023-12-19 19:54:43,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-19 19:54:43,280 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:43,280 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:54:43,289 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 19:54:43,484 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 19:54:43,485 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:43,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:43,485 INFO L85 PathProgramCache]: Analyzing trace with hash -45785549, now seen corresponding path program 1 times [2023-12-19 19:54:43,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:43,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805693375] [2023-12-19 19:54:43,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:43,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:43,493 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:54:43,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353378825] [2023-12-19 19:54:43,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:43,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:43,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:43,494 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 19:54:43,497 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 19:54:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:54:43,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-19 19:54:43,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-12-19 19:54:43,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:54:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-12-19 19:54:43,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:54:43,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805693375] [2023-12-19 19:54:43,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:54:43,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353378825] [2023-12-19 19:54:43,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353378825] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:54:43,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:54:43,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2023-12-19 19:54:43,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325993862] [2023-12-19 19:54:43,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:54:43,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-19 19:54:43,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:54:43,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-19 19:54:43,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-12-19 19:54:43,670 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-19 19:54:43,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:54:43,752 INFO L93 Difference]: Finished difference Result 94 states and 129 transitions. [2023-12-19 19:54:43,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 19:54:43,753 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 70 [2023-12-19 19:54:43,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:54:43,756 INFO L225 Difference]: With dead ends: 94 [2023-12-19 19:54:43,756 INFO L226 Difference]: Without dead ends: 91 [2023-12-19 19:54:43,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-12-19 19:54:43,757 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 20 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 19:54:43,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 148 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 19:54:43,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-19 19:54:43,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-12-19 19:54:43,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 49 states have (on average 1.183673469387755) internal successors, (58), 51 states have internal predecessors, (58), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2023-12-19 19:54:43,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 125 transitions. [2023-12-19 19:54:43,787 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 125 transitions. Word has length 70 [2023-12-19 19:54:43,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:54:43,787 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 125 transitions. [2023-12-19 19:54:43,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-19 19:54:43,788 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 125 transitions. [2023-12-19 19:54:43,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-19 19:54:43,790 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:43,790 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:54:43,810 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 19:54:43,995 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 19:54:43,996 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:43,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:43,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1519552206, now seen corresponding path program 2 times [2023-12-19 19:54:43,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:43,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250427295] [2023-12-19 19:54:43,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:43,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:44,017 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:54:44,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405227020] [2023-12-19 19:54:44,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 19:54:44,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:44,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:44,029 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 19:54:44,030 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 19:54:44,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 19:54:44,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:54:44,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-19 19:54:44,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 19 proven. 47 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-19 19:54:44,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:54:44,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:54:44,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250427295] [2023-12-19 19:54:44,663 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:54:44,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405227020] [2023-12-19 19:54:44,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405227020] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 19:54:44,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:54:44,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-12-19 19:54:44,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423835794] [2023-12-19 19:54:44,663 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 19:54:44,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-19 19:54:44,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:54:44,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-19 19:54:44,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-12-19 19:54:44,664 INFO L87 Difference]: Start difference. First operand 91 states and 125 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-19 19:54:44,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:54:44,936 INFO L93 Difference]: Finished difference Result 123 states and 164 transitions. [2023-12-19 19:54:44,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-19 19:54:44,937 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 75 [2023-12-19 19:54:44,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:54:44,937 INFO L225 Difference]: With dead ends: 123 [2023-12-19 19:54:44,938 INFO L226 Difference]: Without dead ends: 121 [2023-12-19 19:54:44,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2023-12-19 19:54:44,938 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 42 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 19:54:44,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 218 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 19:54:44,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-12-19 19:54:44,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2023-12-19 19:54:44,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 67 states have internal predecessors, (76), 42 states have call successors, (42), 10 states have call predecessors, (42), 10 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2023-12-19 19:54:44,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 159 transitions. [2023-12-19 19:54:44,961 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 159 transitions. Word has length 75 [2023-12-19 19:54:44,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:54:44,961 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 159 transitions. [2023-12-19 19:54:44,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-19 19:54:44,962 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 159 transitions. [2023-12-19 19:54:44,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-19 19:54:44,962 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:44,962 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:54:44,981 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 19:54:45,166 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 19:54:45,167 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:45,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:45,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1881497901, now seen corresponding path program 3 times [2023-12-19 19:54:45,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:45,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720242635] [2023-12-19 19:54:45,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:45,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:45,175 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:54:45,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205307406] [2023-12-19 19:54:45,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 19:54:45,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:45,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:45,176 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 19:54:45,203 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 19:54:45,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-19 19:54:45,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:54:45,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-19 19:54:45,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 43 proven. 20 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-12-19 19:54:45,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:54:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 46 proven. 8 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2023-12-19 19:54:46,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:54:46,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720242635] [2023-12-19 19:54:46,423 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:54:46,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205307406] [2023-12-19 19:54:46,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205307406] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:54:46,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:54:46,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2023-12-19 19:54:46,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495498007] [2023-12-19 19:54:46,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:54:46,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-19 19:54:46,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:54:46,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-19 19:54:46,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2023-12-19 19:54:46,424 INFO L87 Difference]: Start difference. First operand 118 states and 159 transitions. Second operand has 23 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 9 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 11 states have call predecessors, (26), 8 states have call successors, (26) [2023-12-19 19:54:48,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:54:48,708 INFO L93 Difference]: Finished difference Result 141 states and 189 transitions. [2023-12-19 19:54:48,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-19 19:54:48,711 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 9 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 11 states have call predecessors, (26), 8 states have call successors, (26) Word has length 80 [2023-12-19 19:54:48,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:54:48,712 INFO L225 Difference]: With dead ends: 141 [2023-12-19 19:54:48,712 INFO L226 Difference]: Without dead ends: 139 [2023-12-19 19:54:48,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=269, Invalid=1213, Unknown=0, NotChecked=0, Total=1482 [2023-12-19 19:54:48,713 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 115 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-19 19:54:48,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 271 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-19 19:54:48,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-12-19 19:54:48,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 132. [2023-12-19 19:54:48,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 73 states have (on average 1.178082191780822) internal successors, (86), 75 states have internal predecessors, (86), 47 states have call successors, (47), 11 states have call predecessors, (47), 11 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2023-12-19 19:54:48,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 179 transitions. [2023-12-19 19:54:48,785 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 179 transitions. Word has length 80 [2023-12-19 19:54:48,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:54:48,786 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 179 transitions. [2023-12-19 19:54:48,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 9 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 11 states have call predecessors, (26), 8 states have call successors, (26) [2023-12-19 19:54:48,787 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 179 transitions. [2023-12-19 19:54:48,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-19 19:54:48,787 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:48,787 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:54:48,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-19 19:54:48,991 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 19:54:48,992 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:48,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:48,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1305329662, now seen corresponding path program 1 times [2023-12-19 19:54:48,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:48,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850164031] [2023-12-19 19:54:48,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:48,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:48,998 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:54:48,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669843934] [2023-12-19 19:54:48,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:48,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:48,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:48,999 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 19:54:49,012 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 19:54:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:54:49,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-19 19:54:49,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-12-19 19:54:49,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:54:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-12-19 19:54:50,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:54:50,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850164031] [2023-12-19 19:54:50,016 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:54:50,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669843934] [2023-12-19 19:54:50,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669843934] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:54:50,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:54:50,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2023-12-19 19:54:50,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134433906] [2023-12-19 19:54:50,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:54:50,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-19 19:54:50,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:54:50,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-19 19:54:50,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-12-19 19:54:50,017 INFO L87 Difference]: Start difference. First operand 132 states and 179 transitions. Second operand has 22 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2023-12-19 19:54:57,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:54:57,811 INFO L93 Difference]: Finished difference Result 218 states and 311 transitions. [2023-12-19 19:54:57,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-19 19:54:57,812 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 86 [2023-12-19 19:54:57,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:54:57,829 INFO L225 Difference]: With dead ends: 218 [2023-12-19 19:54:57,829 INFO L226 Difference]: Without dead ends: 214 [2023-12-19 19:54:57,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=339, Invalid=1467, Unknown=0, NotChecked=0, Total=1806 [2023-12-19 19:54:57,830 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 113 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-12-19 19:54:57,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 478 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-12-19 19:54:57,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-12-19 19:54:57,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2023-12-19 19:54:57,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 112 states have (on average 1.1964285714285714) internal successors, (134), 114 states have internal predecessors, (134), 83 states have call successors, (83), 14 states have call predecessors, (83), 14 states have return successors, (82), 81 states have call predecessors, (82), 82 states have call successors, (82) [2023-12-19 19:54:57,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 299 transitions. [2023-12-19 19:54:57,899 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 299 transitions. Word has length 86 [2023-12-19 19:54:57,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:54:57,899 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 299 transitions. [2023-12-19 19:54:57,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2023-12-19 19:54:57,899 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 299 transitions. [2023-12-19 19:54:57,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-12-19 19:54:57,900 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:57,900 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 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 19:54:57,905 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 19:54:58,103 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 19:54:58,104 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:58,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:58,104 INFO L85 PathProgramCache]: Analyzing trace with hash 2056054646, now seen corresponding path program 4 times [2023-12-19 19:54:58,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:58,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391568539] [2023-12-19 19:54:58,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:58,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:58,111 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:54:58,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601409932] [2023-12-19 19:54:58,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 19:54:58,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:58,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:58,117 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 19:54:58,119 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 19:54:58,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 19:54:58,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:54:58,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-19 19:54:58,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-12-19 19:54:58,188 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 19:54:58,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:54:58,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391568539] [2023-12-19 19:54:58,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:54:58,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601409932] [2023-12-19 19:54:58,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601409932] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 19:54:58,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 19:54:58,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 19:54:58,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767791989] [2023-12-19 19:54:58,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 19:54:58,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 19:54:58,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:54:58,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 19:54:58,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 19:54:58,190 INFO L87 Difference]: Start difference. First operand 210 states and 299 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-19 19:54:58,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:54:58,283 INFO L93 Difference]: Finished difference Result 273 states and 385 transitions. [2023-12-19 19:54:58,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 19:54:58,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 100 [2023-12-19 19:54:58,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:54:58,284 INFO L225 Difference]: With dead ends: 273 [2023-12-19 19:54:58,284 INFO L226 Difference]: Without dead ends: 189 [2023-12-19 19:54:58,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 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 19:54:58,285 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 19:54:58,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 158 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 19:54:58,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-12-19 19:54:58,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 148. [2023-12-19 19:54:58,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 80 states have (on average 1.15) internal successors, (92), 82 states have internal predecessors, (92), 55 states have call successors, (55), 12 states have call predecessors, (55), 12 states have return successors, (54), 53 states have call predecessors, (54), 54 states have call successors, (54) [2023-12-19 19:54:58,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 201 transitions. [2023-12-19 19:54:58,334 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 201 transitions. Word has length 100 [2023-12-19 19:54:58,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:54:58,334 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 201 transitions. [2023-12-19 19:54:58,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-19 19:54:58,335 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 201 transitions. [2023-12-19 19:54:58,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-19 19:54:58,335 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:58,335 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:54:58,349 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 19:54:58,540 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 19:54:58,540 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:58,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:58,541 INFO L85 PathProgramCache]: Analyzing trace with hash 457852880, now seen corresponding path program 1 times [2023-12-19 19:54:58,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:58,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406297799] [2023-12-19 19:54:58,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:58,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:58,555 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:54:58,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313655756] [2023-12-19 19:54:58,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:58,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:58,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:58,573 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 19:54:58,597 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 19:54:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:54:58,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-19 19:54:58,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:59,153 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2023-12-19 19:54:59,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:54:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2023-12-19 19:54:59,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:54:59,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406297799] [2023-12-19 19:54:59,741 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:54:59,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313655756] [2023-12-19 19:54:59,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313655756] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:54:59,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:54:59,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-12-19 19:54:59,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063255091] [2023-12-19 19:54:59,741 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:54:59,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-19 19:54:59,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:54:59,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-19 19:54:59,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-12-19 19:54:59,742 INFO L87 Difference]: Start difference. First operand 148 states and 201 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 12 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (38), 12 states have call predecessors, (38), 12 states have call successors, (38) [2023-12-19 19:55:08,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:55:08,473 INFO L93 Difference]: Finished difference Result 229 states and 323 transitions. [2023-12-19 19:55:08,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-19 19:55:08,474 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 12 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (38), 12 states have call predecessors, (38), 12 states have call successors, (38) Word has length 119 [2023-12-19 19:55:08,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:55:08,475 INFO L225 Difference]: With dead ends: 229 [2023-12-19 19:55:08,475 INFO L226 Difference]: Without dead ends: 227 [2023-12-19 19:55:08,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=417, Invalid=1745, Unknown=0, NotChecked=0, Total=2162 [2023-12-19 19:55:08,476 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 90 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-19 19:55:08,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 724 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-19 19:55:08,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-12-19 19:55:08,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 169. [2023-12-19 19:55:08,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 92 states have (on average 1.1521739130434783) internal successors, (106), 95 states have internal predecessors, (106), 62 states have call successors, (62), 14 states have call predecessors, (62), 14 states have return successors, (61), 59 states have call predecessors, (61), 61 states have call successors, (61) [2023-12-19 19:55:08,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 229 transitions. [2023-12-19 19:55:08,589 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 229 transitions. Word has length 119 [2023-12-19 19:55:08,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:55:08,589 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 229 transitions. [2023-12-19 19:55:08,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 12 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (38), 12 states have call predecessors, (38), 12 states have call successors, (38) [2023-12-19 19:55:08,590 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 229 transitions. [2023-12-19 19:55:08,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-19 19:55:08,592 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:55:08,592 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:55:08,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-19 19:55:08,798 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 19:55:08,798 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:55:08,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:55:08,799 INFO L85 PathProgramCache]: Analyzing trace with hash -2126175913, now seen corresponding path program 2 times [2023-12-19 19:55:08,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:55:08,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398492075] [2023-12-19 19:55:08,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:55:08,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:55:08,811 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:55:08,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677459073] [2023-12-19 19:55:08,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 19:55:08,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:55:08,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:55:08,812 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 19:55:08,820 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 19:55:08,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 19:55:08,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:55:08,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 60 conjunts are in the unsatisfiable core [2023-12-19 19:55:08,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:55:09,529 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 36 proven. 83 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-12-19 19:55:09,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:55:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 40 proven. 64 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-12-19 19:55:11,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:55:11,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398492075] [2023-12-19 19:55:11,049 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:55:11,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677459073] [2023-12-19 19:55:11,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677459073] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:55:11,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:55:11,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 29 [2023-12-19 19:55:11,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027431213] [2023-12-19 19:55:11,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:55:11,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-19 19:55:11,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:55:11,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-19 19:55:11,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2023-12-19 19:55:11,056 INFO L87 Difference]: Start difference. First operand 169 states and 229 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 25 states have internal predecessors, (53), 14 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 14 states have call predecessors, (38), 14 states have call successors, (38) [2023-12-19 19:55:21,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:55:21,900 INFO L93 Difference]: Finished difference Result 252 states and 349 transitions. [2023-12-19 19:55:21,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-19 19:55:21,900 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 25 states have internal predecessors, (53), 14 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 14 states have call predecessors, (38), 14 states have call successors, (38) Word has length 122 [2023-12-19 19:55:21,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:55:21,901 INFO L225 Difference]: With dead ends: 252 [2023-12-19 19:55:21,901 INFO L226 Difference]: Without dead ends: 250 [2023-12-19 19:55:21,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=583, Invalid=2609, Unknown=0, NotChecked=0, Total=3192 [2023-12-19 19:55:21,903 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 105 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-12-19 19:55:21,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 506 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-12-19 19:55:21,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-12-19 19:55:22,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 226. [2023-12-19 19:55:22,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 123 states have (on average 1.1544715447154472) internal successors, (142), 128 states have internal predecessors, (142), 84 states have call successors, (84), 18 states have call predecessors, (84), 18 states have return successors, (83), 79 states have call predecessors, (83), 83 states have call successors, (83) [2023-12-19 19:55:22,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 309 transitions. [2023-12-19 19:55:22,052 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 309 transitions. Word has length 122 [2023-12-19 19:55:22,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:55:22,052 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 309 transitions. [2023-12-19 19:55:22,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 25 states have internal predecessors, (53), 14 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 14 states have call predecessors, (38), 14 states have call successors, (38) [2023-12-19 19:55:22,053 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 309 transitions. [2023-12-19 19:55:22,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-12-19 19:55:22,053 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:55:22,054 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:55:22,061 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 19:55:22,258 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 19:55:22,259 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:55:22,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:55:22,259 INFO L85 PathProgramCache]: Analyzing trace with hash 2088776170, now seen corresponding path program 3 times [2023-12-19 19:55:22,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:55:22,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022340532] [2023-12-19 19:55:22,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:55:22,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:55:22,266 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:55:22,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097238375] [2023-12-19 19:55:22,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 19:55:22,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:55:22,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:55:22,267 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 19:55:22,269 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 19:55:22,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-19 19:55:22,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:55:22,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-19 19:55:22,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:55:39,914 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 86 proven. 41 refuted. 0 times theorem prover too weak. 423 trivial. 0 not checked. [2023-12-19 19:55:39,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:55:43,374 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 86 proven. 33 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2023-12-19 19:55:43,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:55:43,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022340532] [2023-12-19 19:55:43,375 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:55:43,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097238375] [2023-12-19 19:55:43,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097238375] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:55:43,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:55:43,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2023-12-19 19:55:43,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842422695] [2023-12-19 19:55:43,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:55:43,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-19 19:55:43,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:55:43,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-19 19:55:43,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-12-19 19:55:43,376 INFO L87 Difference]: Start difference. First operand 226 states and 309 transitions. Second operand has 24 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 22 states have internal predecessors, (52), 11 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (34), 13 states have call predecessors, (34), 10 states have call successors, (34) [2023-12-19 19:55:47,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:55:49,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:56:01,974 WARN L293 SmtUtils]: Spent 5.44s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 19:56:16,100 WARN L539 Checker$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 19:56:17,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:56:17,188 INFO L93 Difference]: Finished difference Result 281 states and 373 transitions. [2023-12-19 19:56:17,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-19 19:56:17,188 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 22 states have internal predecessors, (52), 11 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (34), 13 states have call predecessors, (34), 10 states have call successors, (34) Word has length 127 [2023-12-19 19:56:17,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:56:17,190 INFO L225 Difference]: With dead ends: 281 [2023-12-19 19:56:17,190 INFO L226 Difference]: Without dead ends: 279 [2023-12-19 19:56:17,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=256, Invalid=1002, Unknown=2, NotChecked=0, Total=1260 [2023-12-19 19:56:17,190 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 91 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 82 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2023-12-19 19:56:17,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 399 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 562 Invalid, 1 Unknown, 0 Unchecked, 11.8s Time] [2023-12-19 19:56:17,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-12-19 19:56:17,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 271. [2023-12-19 19:56:17,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 150 states have (on average 1.14) internal successors, (171), 155 states have internal predecessors, (171), 96 states have call successors, (96), 24 states have call predecessors, (96), 24 states have return successors, (95), 91 states have call predecessors, (95), 95 states have call successors, (95) [2023-12-19 19:56:17,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 362 transitions. [2023-12-19 19:56:17,359 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 362 transitions. Word has length 127 [2023-12-19 19:56:17,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:56:17,359 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 362 transitions. [2023-12-19 19:56:17,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 22 states have internal predecessors, (52), 11 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (34), 13 states have call predecessors, (34), 10 states have call successors, (34) [2023-12-19 19:56:17,359 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 362 transitions. [2023-12-19 19:56:17,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-12-19 19:56:17,360 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:56:17,360 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:56:17,365 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 19:56:17,565 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 19:56:17,565 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:56:17,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:56:17,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1600677333, now seen corresponding path program 2 times [2023-12-19 19:56:17,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:56:17,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135522773] [2023-12-19 19:56:17,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:56:17,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:56:17,572 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:56:17,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520633271] [2023-12-19 19:56:17,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 19:56:17,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:56:17,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:56:17,573 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 19:56:17,574 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 19:56:17,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 19:56:17,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:56:17,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 61 conjunts are in the unsatisfiable core [2023-12-19 19:56:17,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:56:18,352 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 38 proven. 52 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2023-12-19 19:56:18,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:56:19,977 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-12-19 19:56:19,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:56:19,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135522773] [2023-12-19 19:56:19,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:56:19,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520633271] [2023-12-19 19:56:19,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520633271] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:56:19,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:56:19,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2023-12-19 19:56:19,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672942236] [2023-12-19 19:56:19,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:56:19,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-19 19:56:19,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:56:19,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-19 19:56:19,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-12-19 19:56:19,979 INFO L87 Difference]: Start difference. First operand 271 states and 362 transitions. Second operand has 28 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 14 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (42), 12 states have call predecessors, (42), 12 states have call successors, (42) [2023-12-19 19:56:49,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:56:49,401 INFO L93 Difference]: Finished difference Result 400 states and 561 transitions. [2023-12-19 19:56:49,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-12-19 19:56:49,402 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 14 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (42), 12 states have call predecessors, (42), 12 states have call successors, (42) Word has length 133 [2023-12-19 19:56:49,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:56:49,405 INFO L225 Difference]: With dead ends: 400 [2023-12-19 19:56:49,405 INFO L226 Difference]: Without dead ends: 392 [2023-12-19 19:56:49,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=855, Invalid=4114, Unknown=1, NotChecked=0, Total=4970 [2023-12-19 19:56:49,407 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 228 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2023-12-19 19:56:49,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 764 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2023-12-19 19:56:49,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2023-12-19 19:56:49,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 372. [2023-12-19 19:56:49,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 197 states have (on average 1.1573604060913705) internal successors, (228), 200 states have internal predecessors, (228), 146 states have call successors, (146), 28 states have call predecessors, (146), 28 states have return successors, (145), 143 states have call predecessors, (145), 145 states have call successors, (145) [2023-12-19 19:56:49,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 519 transitions. [2023-12-19 19:56:49,752 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 519 transitions. Word has length 133 [2023-12-19 19:56:49,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:56:49,752 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 519 transitions. [2023-12-19 19:56:49,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 14 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (42), 12 states have call predecessors, (42), 12 states have call successors, (42) [2023-12-19 19:56:49,752 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 519 transitions. [2023-12-19 19:56:49,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-12-19 19:56:49,753 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:56:49,753 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:56:49,758 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 19:56:49,958 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 19:56:49,958 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:56:49,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:56:49,959 INFO L85 PathProgramCache]: Analyzing trace with hash -251529029, now seen corresponding path program 3 times [2023-12-19 19:56:49,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:56:49,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921147363] [2023-12-19 19:56:49,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:56:49,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:56:49,965 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:56:49,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125060919] [2023-12-19 19:56:49,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 19:56:49,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:56:49,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:56:49,966 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 19:56:49,968 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 19:56:50,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-19 19:56:50,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:56:50,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-19 19:56:50,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:56:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 99 proven. 31 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2023-12-19 19:56:50,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:56:50,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:56:50,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921147363] [2023-12-19 19:56:50,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:56:50,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125060919] [2023-12-19 19:56:50,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125060919] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 19:56:50,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:56:50,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-19 19:56:50,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629363561] [2023-12-19 19:56:50,554 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 19:56:50,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-19 19:56:50,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:56:50,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-19 19:56:50,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2023-12-19 19:56:50,555 INFO L87 Difference]: Start difference. First operand 372 states and 519 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-12-19 19:56:51,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:56:51,108 INFO L93 Difference]: Finished difference Result 406 states and 566 transitions. [2023-12-19 19:56:51,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-19 19:56:51,108 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 152 [2023-12-19 19:56:51,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:56:51,110 INFO L225 Difference]: With dead ends: 406 [2023-12-19 19:56:51,110 INFO L226 Difference]: Without dead ends: 399 [2023-12-19 19:56:51,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-12-19 19:56:51,111 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 20 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 19:56:51,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 217 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 19:56:51,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2023-12-19 19:56:51,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 380. [2023-12-19 19:56:51,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 200 states have (on average 1.155) internal successors, (231), 202 states have internal predecessors, (231), 150 states have call successors, (150), 29 states have call predecessors, (150), 29 states have return successors, (149), 148 states have call predecessors, (149), 149 states have call successors, (149) [2023-12-19 19:56:51,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 530 transitions. [2023-12-19 19:56:51,498 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 530 transitions. Word has length 152 [2023-12-19 19:56:51,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:56:51,498 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 530 transitions. [2023-12-19 19:56:51,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-12-19 19:56:51,498 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 530 transitions. [2023-12-19 19:56:51,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-12-19 19:56:51,500 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:56:51,500 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:56:51,505 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 19:56:51,702 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 19:56:51,702 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:56:51,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:56:51,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1019680267, now seen corresponding path program 4 times [2023-12-19 19:56:51,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:56:51,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992927980] [2023-12-19 19:56:51,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:56:51,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:56:51,717 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:56:51,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636973260] [2023-12-19 19:56:51,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 19:56:51,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:56:51,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:56:51,718 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 19:56:51,768 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 19:56:51,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 19:56:51,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:56:51,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 74 conjunts are in the unsatisfiable core [2023-12-19 19:56:51,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:56:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 109 proven. 168 refuted. 0 times theorem prover too weak. 1032 trivial. 0 not checked. [2023-12-19 19:56:52,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:56:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 109 proven. 168 refuted. 0 times theorem prover too weak. 1032 trivial. 0 not checked. [2023-12-19 19:56:56,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:56:56,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992927980] [2023-12-19 19:56:56,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:56:56,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636973260] [2023-12-19 19:56:56,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636973260] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:56:56,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:56:56,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2023-12-19 19:56:56,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055957840] [2023-12-19 19:56:56,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:56:56,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-19 19:56:56,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:56:56,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-19 19:56:56,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2023-12-19 19:56:56,215 INFO L87 Difference]: Start difference. First operand 380 states and 530 transitions. Second operand has 33 states, 31 states have (on average 1.935483870967742) internal successors, (60), 29 states have internal predecessors, (60), 20 states have call successors, (58), 3 states have call predecessors, (58), 2 states have return successors, (56), 16 states have call predecessors, (56), 18 states have call successors, (56) [2023-12-19 19:57:03,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:57:15,290 WARN L539 Checker$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 19:57:22,187 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 19:57:46,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:57:46,340 INFO L93 Difference]: Finished difference Result 520 states and 744 transitions. [2023-12-19 19:57:46,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-19 19:57:46,342 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.935483870967742) internal successors, (60), 29 states have internal predecessors, (60), 20 states have call successors, (58), 3 states have call predecessors, (58), 2 states have return successors, (56), 16 states have call predecessors, (56), 18 states have call successors, (56) Word has length 177 [2023-12-19 19:57:46,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:57:46,347 INFO L225 Difference]: With dead ends: 520 [2023-12-19 19:57:46,347 INFO L226 Difference]: Without dead ends: 516 [2023-12-19 19:57:46,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=1113, Invalid=4587, Unknown=0, NotChecked=0, Total=5700 [2023-12-19 19:57:46,357 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 151 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 232 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.9s IncrementalHoareTripleChecker+Time [2023-12-19 19:57:46,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 1182 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1497 Invalid, 3 Unknown, 0 Unchecked, 28.9s Time] [2023-12-19 19:57:46,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2023-12-19 19:57:46,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 452. [2023-12-19 19:57:46,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 232 states have (on average 1.168103448275862) internal successors, (271), 235 states have internal predecessors, (271), 186 states have call successors, (186), 33 states have call predecessors, (186), 33 states have return successors, (185), 183 states have call predecessors, (185), 185 states have call successors, (185) [2023-12-19 19:57:46,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 642 transitions. [2023-12-19 19:57:46,923 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 642 transitions. Word has length 177 [2023-12-19 19:57:46,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:57:46,924 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 642 transitions. [2023-12-19 19:57:46,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.935483870967742) internal successors, (60), 29 states have internal predecessors, (60), 20 states have call successors, (58), 3 states have call predecessors, (58), 2 states have return successors, (56), 16 states have call predecessors, (56), 18 states have call successors, (56) [2023-12-19 19:57:46,924 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 642 transitions. [2023-12-19 19:57:46,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-12-19 19:57:46,925 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:57:46,925 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:57:46,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-19 19:57:47,132 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 19:57:47,132 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:57:47,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:57:47,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1373077417, now seen corresponding path program 5 times [2023-12-19 19:57:47,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:57:47,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266263856] [2023-12-19 19:57:47,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:57:47,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:57:47,142 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:57:47,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827458059] [2023-12-19 19:57:47,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 19:57:47,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:57:47,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:57:47,143 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 19:57:47,148 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 19:57:47,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-12-19 19:57:47,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:57:47,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 64 conjunts are in the unsatisfiable core [2023-12-19 19:57:47,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:57:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 48 proven. 97 refuted. 0 times theorem prover too weak. 1164 trivial. 0 not checked. [2023-12-19 19:57:48,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:58:00,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 48 proven. 97 refuted. 0 times theorem prover too weak. 1164 trivial. 0 not checked. [2023-12-19 19:58:00,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:58:00,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266263856] [2023-12-19 19:58:00,823 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:58:00,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827458059] [2023-12-19 19:58:00,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827458059] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:58:00,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:58:00,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2023-12-19 19:58:00,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77741003] [2023-12-19 19:58:00,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:58:00,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-19 19:58:00,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:58:00,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-19 19:58:00,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2023-12-19 19:58:00,825 INFO L87 Difference]: Start difference. First operand 452 states and 642 transitions. Second operand has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 17 states have call successors, (58), 3 states have call predecessors, (58), 1 states have return successors, (56), 15 states have call predecessors, (56), 15 states have call successors, (56) [2023-12-19 19:58:42,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:58:42,759 INFO L93 Difference]: Finished difference Result 718 states and 1060 transitions. [2023-12-19 19:58:42,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-12-19 19:58:42,760 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 17 states have call successors, (58), 3 states have call predecessors, (58), 1 states have return successors, (56), 15 states have call predecessors, (56), 15 states have call successors, (56) Word has length 177 [2023-12-19 19:58:42,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:58:42,763 INFO L225 Difference]: With dead ends: 718 [2023-12-19 19:58:42,763 INFO L226 Difference]: Without dead ends: 709 [2023-12-19 19:58:42,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 36.4s TimeCoverageRelationStatistics Valid=1009, Invalid=4691, Unknown=0, NotChecked=0, Total=5700 [2023-12-19 19:58:42,764 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 154 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2023-12-19 19:58:42,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 969 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 11.9s Time] [2023-12-19 19:58:42,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2023-12-19 19:58:43,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 635. [2023-12-19 19:58:43,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 314 states have (on average 1.1815286624203822) internal successors, (371), 319 states have internal predecessors, (371), 281 states have call successors, (281), 39 states have call predecessors, (281), 39 states have return successors, (280), 276 states have call predecessors, (280), 280 states have call successors, (280) [2023-12-19 19:58:43,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 932 transitions. [2023-12-19 19:58:43,706 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 932 transitions. Word has length 177 [2023-12-19 19:58:43,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:58:43,706 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 932 transitions. [2023-12-19 19:58:43,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 17 states have call successors, (58), 3 states have call predecessors, (58), 1 states have return successors, (56), 15 states have call predecessors, (56), 15 states have call successors, (56) [2023-12-19 19:58:43,707 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 932 transitions. [2023-12-19 19:58:43,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2023-12-19 19:58:43,708 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:58:43,708 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:58:43,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-19 19:58:43,914 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 19:58:43,914 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:58:43,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:58:43,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1586124913, now seen corresponding path program 4 times [2023-12-19 19:58:43,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:58:43,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867584040] [2023-12-19 19:58:43,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:58:43,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:58:43,930 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:58:43,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333076195] [2023-12-19 19:58:43,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 19:58:43,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:58:43,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:58:43,946 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 19:58:43,946 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 19:58:44,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 19:58:44,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:58:44,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 91 conjunts are in the unsatisfiable core [2023-12-19 19:58:44,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:58:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 182 proven. 158 refuted. 0 times theorem prover too weak. 1201 trivial. 0 not checked. [2023-12-19 19:58:45,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:58:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 256 proven. 32 refuted. 0 times theorem prover too weak. 1253 trivial. 0 not checked. [2023-12-19 19:58:45,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:58:45,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867584040] [2023-12-19 19:58:45,895 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:58:45,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333076195] [2023-12-19 19:58:45,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333076195] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:58:45,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:58:45,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 9] total 29 [2023-12-19 19:58:45,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254830023] [2023-12-19 19:58:45,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:58:45,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-19 19:58:45,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:58:45,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-19 19:58:45,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2023-12-19 19:58:45,896 INFO L87 Difference]: Start difference. First operand 635 states and 932 transitions. Second operand has 29 states, 27 states have (on average 2.259259259259259) internal successors, (61), 25 states have internal predecessors, (61), 16 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (49), 16 states have call predecessors, (49), 16 states have call successors, (49) [2023-12-19 19:58:48,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:58:48,757 INFO L93 Difference]: Finished difference Result 689 states and 1007 transitions. [2023-12-19 19:58:48,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-19 19:58:48,758 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.259259259259259) internal successors, (61), 25 states have internal predecessors, (61), 16 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (49), 16 states have call predecessors, (49), 16 states have call successors, (49) Word has length 191 [2023-12-19 19:58:48,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:58:48,760 INFO L225 Difference]: With dead ends: 689 [2023-12-19 19:58:48,760 INFO L226 Difference]: Without dead ends: 685 [2023-12-19 19:58:48,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 352 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=322, Invalid=1658, Unknown=0, NotChecked=0, Total=1980 [2023-12-19 19:58:48,761 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 72 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-19 19:58:48,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 624 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-19 19:58:48,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2023-12-19 19:58:49,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 645. [2023-12-19 19:58:49,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 322 states have (on average 1.173913043478261) internal successors, (378), 326 states have internal predecessors, (378), 281 states have call successors, (281), 42 states have call predecessors, (281), 41 states have return successors, (280), 276 states have call predecessors, (280), 280 states have call successors, (280) [2023-12-19 19:58:49,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 939 transitions. [2023-12-19 19:58:49,724 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 939 transitions. Word has length 191 [2023-12-19 19:58:49,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:58:49,725 INFO L495 AbstractCegarLoop]: Abstraction has 645 states and 939 transitions. [2023-12-19 19:58:49,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.259259259259259) internal successors, (61), 25 states have internal predecessors, (61), 16 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (49), 16 states have call predecessors, (49), 16 states have call successors, (49) [2023-12-19 19:58:49,725 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 939 transitions. [2023-12-19 19:58:49,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-12-19 19:58:49,729 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:58:49,729 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:58:49,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-19 19:58:49,932 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 19:58:49,932 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:58:49,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:58:49,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1490058147, now seen corresponding path program 6 times [2023-12-19 19:58:49,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:58:49,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416886540] [2023-12-19 19:58:49,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:58:49,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:58:49,941 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:58:49,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201733863] [2023-12-19 19:58:49,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 19:58:49,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:58:49,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:58:49,942 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 19:58:49,972 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 19:58:50,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-12-19 19:58:50,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:58:50,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 92 conjunts are in the unsatisfiable core [2023-12-19 19:58:50,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:58:51,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1769 backedges. 142 proven. 151 refuted. 0 times theorem prover too weak. 1476 trivial. 0 not checked. [2023-12-19 19:58:51,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:58:55,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1769 backedges. 133 proven. 145 refuted. 0 times theorem prover too weak. 1491 trivial. 0 not checked. [2023-12-19 19:58:55,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:58:55,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416886540] [2023-12-19 19:58:55,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:58:55,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201733863] [2023-12-19 19:58:55,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201733863] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:58:55,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:58:55,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 39 [2023-12-19 19:58:55,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571758213] [2023-12-19 19:58:55,454 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:58:55,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-19 19:58:55,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:58:55,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-19 19:58:55,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2023-12-19 19:58:55,456 INFO L87 Difference]: Start difference. First operand 645 states and 939 transitions. Second operand has 39 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 20 states have call successors, (66), 3 states have call predecessors, (66), 3 states have return successors, (65), 19 states have call predecessors, (65), 18 states have call successors, (65) [2023-12-19 19:59:04,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:59:06,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:59:33,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:59:33,186 INFO L93 Difference]: Finished difference Result 785 states and 1133 transitions. [2023-12-19 19:59:33,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-12-19 19:59:33,187 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 20 states have call successors, (66), 3 states have call predecessors, (66), 3 states have return successors, (65), 19 states have call predecessors, (65), 18 states have call successors, (65) Word has length 202 [2023-12-19 19:59:33,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:59:33,190 INFO L225 Difference]: With dead ends: 785 [2023-12-19 19:59:33,190 INFO L226 Difference]: Without dead ends: 779 [2023-12-19 19:59:33,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 364 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1618 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=1364, Invalid=5946, Unknown=0, NotChecked=0, Total=7310 [2023-12-19 19:59:33,192 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 208 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 1487 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 1854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 1487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2023-12-19 19:59:33,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 1089 Invalid, 1854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 1487 Invalid, 0 Unknown, 0 Unchecked, 15.6s Time] [2023-12-19 19:59:33,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2023-12-19 19:59:34,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 489. [2023-12-19 19:59:34,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 252 states have (on average 1.1547619047619047) internal successors, (291), 254 states have internal predecessors, (291), 196 states have call successors, (196), 41 states have call predecessors, (196), 40 states have return successors, (195), 193 states have call predecessors, (195), 195 states have call successors, (195) [2023-12-19 19:59:34,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 682 transitions. [2023-12-19 19:59:34,099 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 682 transitions. Word has length 202 [2023-12-19 19:59:34,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:59:34,099 INFO L495 AbstractCegarLoop]: Abstraction has 489 states and 682 transitions. [2023-12-19 19:59:34,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 20 states have call successors, (66), 3 states have call predecessors, (66), 3 states have return successors, (65), 19 states have call predecessors, (65), 18 states have call successors, (65) [2023-12-19 19:59:34,100 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 682 transitions. [2023-12-19 19:59:34,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2023-12-19 19:59:34,101 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:59:34,101 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:59:34,107 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 19:59:34,307 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 19:59:34,307 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:59:34,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:59:34,308 INFO L85 PathProgramCache]: Analyzing trace with hash -2127526063, now seen corresponding path program 7 times [2023-12-19 19:59:34,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:59:34,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130398763] [2023-12-19 19:59:34,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:59:34,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:59:34,315 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:59:34,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189188056] [2023-12-19 19:59:34,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 19:59:34,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:59:34,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:59:34,317 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 19:59:34,318 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 19:59:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:59:34,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 77 conjunts are in the unsatisfiable core [2023-12-19 19:59:34,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:59:35,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 70 proven. 184 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2023-12-19 19:59:35,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:59:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 64 proven. 175 refuted. 0 times theorem prover too weak. 2044 trivial. 0 not checked. [2023-12-19 19:59:39,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:59:39,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130398763] [2023-12-19 19:59:39,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:59:39,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189188056] [2023-12-19 19:59:39,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189188056] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:59:39,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:59:39,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2023-12-19 19:59:39,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101852109] [2023-12-19 19:59:39,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:59:39,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-19 19:59:39,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:59:39,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-19 19:59:39,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2023-12-19 19:59:39,270 INFO L87 Difference]: Start difference. First operand 489 states and 682 transitions. Second operand has 35 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 22 states have call successors, (75), 3 states have call predecessors, (75), 2 states have return successors, (74), 20 states have call predecessors, (74), 20 states have call successors, (74) [2023-12-19 20:00:15,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:00:51,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:00:51,530 INFO L93 Difference]: Finished difference Result 749 states and 1118 transitions. [2023-12-19 20:00:51,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-12-19 20:00:51,532 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 22 states have call successors, (75), 3 states have call predecessors, (75), 2 states have return successors, (74), 20 states have call predecessors, (74), 20 states have call successors, (74) Word has length 221 [2023-12-19 20:00:51,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:00:51,535 INFO L225 Difference]: With dead ends: 749 [2023-12-19 20:00:51,535 INFO L226 Difference]: Without dead ends: 743 [2023-12-19 20:00:51,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2190 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=1532, Invalid=7588, Unknown=0, NotChecked=0, Total=9120 [2023-12-19 20:00:51,538 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 276 mSDsluCounter, 2159 mSDsCounter, 0 mSdLazyCounter, 2329 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 2280 SdHoareTripleChecker+Invalid, 2758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 2329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.4s IncrementalHoareTripleChecker+Time [2023-12-19 20:00:51,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 2280 Invalid, 2758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 2329 Invalid, 0 Unknown, 0 Unchecked, 28.4s Time] [2023-12-19 20:00:51,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2023-12-19 20:00:53,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 657. [2023-12-19 20:00:53,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 317 states have (on average 1.195583596214511) internal successors, (379), 319 states have internal predecessors, (379), 296 states have call successors, (296), 44 states have call predecessors, (296), 43 states have return successors, (295), 293 states have call predecessors, (295), 295 states have call successors, (295) [2023-12-19 20:00:53,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 970 transitions. [2023-12-19 20:00:53,188 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 970 transitions. Word has length 221 [2023-12-19 20:00:53,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:00:53,188 INFO L495 AbstractCegarLoop]: Abstraction has 657 states and 970 transitions. [2023-12-19 20:00:53,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 22 states have call successors, (75), 3 states have call predecessors, (75), 2 states have return successors, (74), 20 states have call predecessors, (74), 20 states have call successors, (74) [2023-12-19 20:00:53,188 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 970 transitions. [2023-12-19 20:00:53,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-12-19 20:00:53,206 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:00:53,206 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:00:53,212 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 20:00:53,411 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 20:00:53,411 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:00:53,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:00:53,412 INFO L85 PathProgramCache]: Analyzing trace with hash -2135831332, now seen corresponding path program 8 times [2023-12-19 20:00:53,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:00:53,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119780358] [2023-12-19 20:00:53,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:00:53,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:00:53,424 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:00:53,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21918420] [2023-12-19 20:00:53,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 20:00:53,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:00:53,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:00:53,442 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 20:00:53,443 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 20:00:53,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 20:00:53,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unknown [2023-12-19 20:00:53,558 WARN L124 FreeRefinementEngine]: Strategy CAMEL was unsuccessful and could not determine trace feasibility [2023-12-19 20:00:53,558 INFO L360 BasicCegarLoop]: Counterexample might be feasible [2023-12-19 20:00:53,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-19 20:00:53,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-19 20:00:53,765 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 20:00:53,767 INFO L445 BasicCegarLoop]: Path program histogram: [8, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:00:53,769 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-19 20:00:53,800 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.12 08:00:53 BoogieIcfgContainer [2023-12-19 20:00:53,800 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-19 20:00:53,800 INFO L158 Benchmark]: Toolchain (without parser) took 374713.83ms. Allocated memory was 347.1MB in the beginning and 501.2MB in the end (delta: 154.1MB). Free memory was 296.9MB in the beginning and 356.1MB in the end (delta: -59.3MB). Peak memory consumption was 96.4MB. Max. memory is 8.0GB. [2023-12-19 20:00:53,800 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 240.1MB. Free memory is still 191.6MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-19 20:00:53,801 INFO L158 Benchmark]: CACSL2BoogieTranslator took 199.18ms. Allocated memory is still 347.1MB. Free memory was 296.6MB in the beginning and 285.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-19 20:00:53,801 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.16ms. Allocated memory is still 347.1MB. Free memory was 285.1MB in the beginning and 283.4MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-19 20:00:53,801 INFO L158 Benchmark]: Boogie Preprocessor took 21.24ms. Allocated memory is still 347.1MB. Free memory was 283.4MB in the beginning and 281.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-19 20:00:53,803 INFO L158 Benchmark]: RCFGBuilder took 200.81ms. Allocated memory is still 347.1MB. Free memory was 281.7MB in the beginning and 269.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-19 20:00:53,803 INFO L158 Benchmark]: TraceAbstraction took 374265.86ms. Allocated memory was 347.1MB in the beginning and 501.2MB in the end (delta: 154.1MB). Free memory was 268.3MB in the beginning and 356.1MB in the end (delta: -87.8MB). Peak memory consumption was 67.1MB. Max. memory is 8.0GB. [2023-12-19 20:00:53,812 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 240.1MB. Free memory is still 191.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 199.18ms. Allocated memory is still 347.1MB. Free memory was 296.6MB in the beginning and 285.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.16ms. Allocated memory is still 347.1MB. Free memory was 285.1MB in the beginning and 283.4MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.24ms. Allocated memory is still 347.1MB. Free memory was 283.4MB in the beginning and 281.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 200.81ms. Allocated memory is still 347.1MB. Free memory was 281.7MB in the beginning and 269.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 374265.86ms. Allocated memory was 347.1MB in the beginning and 501.2MB in the end (delta: 154.1MB). Free memory was 268.3MB in the beginning and 356.1MB in the end (delta: -87.8MB). Peak memory consumption was 67.1MB. 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 - UnprovableResult [Line: 13]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int x, y; [L20] long long a, b, p, q, r, s, c, k, xy, yy; [L21] x = __VERIFIER_nondet_int() [L22] CALL assume_abort_if_not(x>=0 && x<=20) [L8] COND FALSE !(!cond) [L22] RET assume_abort_if_not(x>=0 && x<=20) [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(y>=0 && y<=20) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(y>=0 && y<=20) [L25] CALL assume_abort_if_not(x >= 1) [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(x >= 1) [L26] CALL assume_abort_if_not(y >= 1) [L8] COND FALSE !(!cond) [L26] RET assume_abort_if_not(y >= 1) [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 [L32] r = 0 [L33] s = 1 [L34] c = 0 [L35] k = 0 [L36] xy = (long long) x * y [L37] yy = (long long) y * y [L38] CALL assume_abort_if_not(xy < 2147483647) [L8] COND FALSE !(!cond) [L38] RET assume_abort_if_not(xy < 2147483647) [L39] CALL assume_abort_if_not(yy < 2147483647) [L8] COND FALSE !(!cond) [L39] RET assume_abort_if_not(yy < 2147483647) [L41] COND TRUE 1 [L42] COND FALSE, EXPR !(!(b != 0)) [L44] EXPR c = a [L45] EXPR k = 0 [L47] COND TRUE, EXPR 1 [L48] CALL, EXPR __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET, EXPR __VERIFIER_assert(a == k * b + c) [L49] CALL, EXPR __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET, EXPR __VERIFIER_assert(a == y*r + x*p) [L50] CALL, EXPR __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET, EXPR __VERIFIER_assert(b == x * q + y * s) [L51] CALL, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L51] RET, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L52] COND TRUE, EXPR !(c >= b) [L58] EXPR a = b [L59] EXPR b = c [L61] long long temp; [L62] EXPR temp = p [L63] EXPR p = q [L64] EXPR q = temp - q * k [L65] EXPR temp = r [L66] EXPR r = s [L67] EXPR s = temp - s * k [L41-L68] { if (!(b != 0)) break; c = a; k = 0; while (1) { __VERIFIER_assert(a == k * b + c); __VERIFIER_assert(a == y*r + x*p); __VERIFIER_assert(b == x * q + y * s); __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0); if (!(c >= b)) break; c = c - b; k = k + 1; } a = b; b = c; long long temp; temp = p; p = q; q = temp - q * k; temp = r; r = s; s = temp - s * k; } [L41] COND TRUE 1 [L42] COND FALSE, EXPR !(!(b != 0)) [L44] EXPR c = a [L45] EXPR k = 0 [L47] COND TRUE, EXPR 1 [L48] CALL, EXPR __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET, EXPR __VERIFIER_assert(a == k * b + c) [L49] CALL, EXPR __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET, EXPR __VERIFIER_assert(a == y*r + x*p) [L50] CALL, EXPR __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET, EXPR __VERIFIER_assert(b == x * q + y * s) [L51] CALL, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L51] RET, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L52] COND FALSE, EXPR !(!(c >= b)) [L54] EXPR c = c - b [L55] EXPR k = k + 1 [L47] COND TRUE, EXPR 1 [L48] CALL, EXPR __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET, EXPR __VERIFIER_assert(a == k * b + c) [L49] CALL, EXPR __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET, EXPR __VERIFIER_assert(a == y*r + x*p) [L50] CALL, EXPR __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET, EXPR __VERIFIER_assert(b == x * q + y * s) [L51] CALL, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L51] RET, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L52] COND TRUE, EXPR !(c >= b) [L58] EXPR a = b [L59] EXPR b = c [L61] long long temp; [L62] EXPR temp = p [L63] EXPR p = q [L64] EXPR q = temp - q * k [L65] EXPR temp = r [L66] EXPR r = s [L67] EXPR s = temp - s * k [L41-L68] { if (!(b != 0)) break; c = a; k = 0; while (1) { __VERIFIER_assert(a == k * b + c); __VERIFIER_assert(a == y*r + x*p); __VERIFIER_assert(b == x * q + y * s); __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0); if (!(c >= b)) break; c = c - b; k = k + 1; } a = b; b = c; long long temp; temp = p; p = q; q = temp - q * k; temp = r; r = s; s = temp - s * k; } [L41] COND TRUE 1 [L42] COND FALSE, EXPR !(!(b != 0)) [L44] EXPR c = a [L45] EXPR k = 0 [L47] COND TRUE, EXPR 1 [L48] CALL, EXPR __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET, EXPR __VERIFIER_assert(a == k * b + c) [L49] CALL, EXPR __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET, EXPR __VERIFIER_assert(a == y*r + x*p) [L50] CALL, EXPR __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET, EXPR __VERIFIER_assert(b == x * q + y * s) [L51] CALL, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L51] RET, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L52] COND FALSE, EXPR !(!(c >= b)) [L54] EXPR c = c - b [L55] EXPR k = k + 1 [L47] COND TRUE, EXPR 1 [L48] CALL, EXPR __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET, EXPR __VERIFIER_assert(a == k * b + c) [L49] CALL, EXPR __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET, EXPR __VERIFIER_assert(a == y*r + x*p) [L50] CALL, EXPR __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET, EXPR __VERIFIER_assert(b == x * q + y * s) [L51] CALL, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L51] RET, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L52] COND FALSE, EXPR !(!(c >= b)) [L54] EXPR c = c - b [L55] EXPR k = k + 1 [L47] COND TRUE, EXPR 1 [L48] CALL, EXPR __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET, EXPR __VERIFIER_assert(a == k * b + c) [L49] CALL, EXPR __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET, EXPR __VERIFIER_assert(a == y*r + x*p) [L50] CALL, EXPR __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET, EXPR __VERIFIER_assert(b == x * q + y * s) [L51] CALL, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L51] RET, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L52] COND FALSE, EXPR !(!(c >= b)) [L54] EXPR c = c - b [L55] EXPR k = k + 1 [L47] COND TRUE, EXPR 1 [L48] CALL, EXPR __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET, EXPR __VERIFIER_assert(a == k * b + c) [L49] CALL, EXPR __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET, EXPR __VERIFIER_assert(a == y*r + x*p) [L50] CALL, EXPR __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET, EXPR __VERIFIER_assert(b == x * q + y * s) [L51] CALL, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L51] RET, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L52] COND FALSE, EXPR !(!(c >= b)) [L54] EXPR c = c - b [L55] EXPR k = k + 1 [L47] COND TRUE, EXPR 1 [L48] CALL, EXPR __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET, EXPR __VERIFIER_assert(a == k * b + c) [L49] CALL, EXPR __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET, EXPR __VERIFIER_assert(a == y*r + x*p) [L50] CALL, EXPR __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET, EXPR __VERIFIER_assert(b == x * q + y * s) [L51] CALL, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L51] RET, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L52] COND TRUE, EXPR !(c >= b) [L58] EXPR a = b [L59] EXPR b = c [L61] long long temp; [L62] EXPR temp = p [L63] EXPR p = q [L64] EXPR q = temp - q * k [L65] EXPR temp = r [L66] EXPR r = s [L67] EXPR s = temp - s * k [L41-L68] { if (!(b != 0)) break; c = a; k = 0; while (1) { __VERIFIER_assert(a == k * b + c); __VERIFIER_assert(a == y*r + x*p); __VERIFIER_assert(b == x * q + y * s); __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0); if (!(c >= b)) break; c = c - b; k = k + 1; } a = b; b = c; long long temp; temp = p; p = q; q = temp - q * k; temp = r; r = s; s = temp - s * k; } [L41] COND TRUE 1 [L42] COND TRUE !(b != 0) [L71] CALL __VERIFIER_assert(q*x + s*y == 0) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 374.2s, OverallIterations: 23, TraceHistogramMax: 33, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.1s, AutomataDifference: 299.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 1881 SdHoareTripleChecker+Valid, 116.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1779 mSDsluCounter, 11044 SdHoareTripleChecker+Invalid, 115.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10004 mSDsCounter, 2386 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12360 IncrementalHoareTripleChecker+Invalid, 14750 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2386 mSolverCounterUnsat, 1040 mSDtfsCounter, 12360 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4705 GetRequests, 3922 SyntacticMatches, 11 SemanticMatches, 772 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10047 ImplicationChecksByTransitivity, 204.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=657occurred in iteration=22, InterpolantAutomatonStates: 527, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 6.5s AutomataMinimizationTime, 22 MinimizatonAttempts, 757 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 61.0s InterpolantComputationTime, 2625 NumberOfCodeBlocks, 2386 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 4267 ConstructedInterpolants, 0 QuantifiedInterpolants, 36754 SizeOfPredicates, 162 NumberOfNonLiveVariables, 5059 ConjunctsInSsa, 927 ConjunctsInUnsatCore, 39 InterpolantComputations, 5 PerfectInterpolantSequences, 21832/23817 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: unable to determine feasibility of some traces [2023-12-19 20:00:53,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...