/usr/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 -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/nla-digbench/divbin.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 00:26:19,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 00:26:19,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 00:26:19,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-31 00:26:19,843 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-31 00:26:19,860 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 00:26:19,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 00:26:19,860 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 00:26:19,861 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 00:26:19,861 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 00:26:19,861 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 00:26:19,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 00:26:19,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 00:26:19,862 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 00:26:19,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 00:26:19,862 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 00:26:19,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 00:26:19,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 00:26:19,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 00:26:19,862 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 00:26:19,862 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 00:26:19,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 00:26:19,863 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 00:26:19,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 00:26:19,863 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 00:26:19,863 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 00:26:19,863 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 00:26:19,863 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 00:26:19,863 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 00:26:19,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:26:19,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 00:26:19,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 00:26:19,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 00:26:19,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 00:26:19,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 00:26:19,864 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 00:26:19,864 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 00:26:19,864 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 00:26:19,864 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 00:26:19,864 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 00:26:19,864 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 00:26:20,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 00:26:20,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 00:26:20,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 00:26:20,048 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 00:26:20,050 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 00:26:20,052 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/divbin.i [2023-03-31 00:26:21,083 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 00:26:21,226 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 00:26:21,227 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/divbin.i [2023-03-31 00:26:21,231 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91960a8f8/ec26f9cc2d7f4b7393efef58a9c5ad5b/FLAGaedd2e3ce [2023-03-31 00:26:21,241 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91960a8f8/ec26f9cc2d7f4b7393efef58a9c5ad5b [2023-03-31 00:26:21,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 00:26:21,243 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 00:26:21,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 00:26:21,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 00:26:21,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 00:26:21,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:26:21" (1/1) ... [2023-03-31 00:26:21,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cd01863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:26:21, skipping insertion in model container [2023-03-31 00:26:21,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:26:21" (1/1) ... [2023-03-31 00:26:21,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 00:26:21,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 00:26:21,358 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/divbin.i[950,963] [2023-03-31 00:26:21,372 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:26:21,378 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 00:26:21,387 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/divbin.i[950,963] [2023-03-31 00:26:21,390 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:26:21,399 INFO L208 MainTranslator]: Completed translation [2023-03-31 00:26:21,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:26:21 WrapperNode [2023-03-31 00:26:21,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 00:26:21,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 00:26:21,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 00:26:21,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 00:26:21,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:26:21" (1/1) ... [2023-03-31 00:26:21,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:26:21" (1/1) ... [2023-03-31 00:26:21,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:26:21" (1/1) ... [2023-03-31 00:26:21,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:26:21" (1/1) ... [2023-03-31 00:26:21,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:26:21" (1/1) ... [2023-03-31 00:26:21,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:26:21" (1/1) ... [2023-03-31 00:26:21,431 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:26:21" (1/1) ... [2023-03-31 00:26:21,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:26:21" (1/1) ... [2023-03-31 00:26:21,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 00:26:21,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 00:26:21,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 00:26:21,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 00:26:21,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:26:21" (1/1) ... [2023-03-31 00:26:21,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:26:21,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:26:21,456 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 00:26:21,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 00:26:21,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 00:26:21,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 00:26:21,482 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 00:26:21,482 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 00:26:21,482 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 00:26:21,482 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 00:26:21,482 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 00:26:21,482 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 00:26:21,482 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 00:26:21,482 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 00:26:21,482 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 00:26:21,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 00:26:21,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-03-31 00:26:21,483 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 00:26:21,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 00:26:21,483 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 00:26:21,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 00:26:21,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 00:26:21,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 00:26:21,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 00:26:21,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 00:26:21,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 00:26:21,569 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 00:26:21,572 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 00:26:21,739 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 00:26:21,743 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 00:26:21,743 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 00:26:21,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:26:21 BoogieIcfgContainer [2023-03-31 00:26:21,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 00:26:21,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 00:26:21,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 00:26:21,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 00:26:21,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 12:26:21" (1/3) ... [2023-03-31 00:26:21,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d9d37b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:26:21, skipping insertion in model container [2023-03-31 00:26:21,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:26:21" (2/3) ... [2023-03-31 00:26:21,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d9d37b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:26:21, skipping insertion in model container [2023-03-31 00:26:21,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:26:21" (3/3) ... [2023-03-31 00:26:21,758 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin.i [2023-03-31 00:26:21,771 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 00:26:21,771 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 00:26:21,818 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 00:26:21,824 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=LoopsAndPotentialCycles, 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;@46ac1f5c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 00:26:21,825 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 00:26:21,828 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 00:26:21,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 00:26:21,834 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:26:21,834 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:26:21,835 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:26:21,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:26:21,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1360041874, now seen corresponding path program 1 times [2023-03-31 00:26:21,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:26:21,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945760359] [2023-03-31 00:26:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:26:21,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:26:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:26:21,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:26:21,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945760359] [2023-03-31 00:26:21,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-03-31 00:26:21,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81978882] [2023-03-31 00:26:21,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:26:21,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:26:21,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:26:21,963 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) [2023-03-31 00:26:21,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 00:26:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:26:22,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjunts are in the unsatisfiable core [2023-03-31 00:26:22,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:26:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 00:26:22,053 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:26:22,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81978882] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:26:22,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:26:22,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 00:26:22,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362680668] [2023-03-31 00:26:22,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:26:22,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 00:26:22,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:26:22,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 00:26:22,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 00:26:22,097 INFO L87 Difference]: Start difference. First operand has 31 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:26:22,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:26:22,116 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2023-03-31 00:26:22,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 00:26:22,117 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2023-03-31 00:26:22,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:26:22,122 INFO L225 Difference]: With dead ends: 55 [2023-03-31 00:26:22,122 INFO L226 Difference]: Without dead ends: 26 [2023-03-31 00:26:22,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 00:26:22,129 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:26:22,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:26:22,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-03-31 00:26:22,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-03-31 00:26:22,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 00:26:22,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-03-31 00:26:22,161 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 23 [2023-03-31 00:26:22,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:26:22,162 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-03-31 00:26:22,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:26:22,162 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-03-31 00:26:22,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-31 00:26:22,164 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:26:22,164 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:26:22,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 00:26:22,368 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 [2023-03-31 00:26:22,369 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:26:22,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:26:22,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1801528411, now seen corresponding path program 1 times [2023-03-31 00:26:22,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:26:22,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366813691] [2023-03-31 00:26:22,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:26:22,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:26:22,383 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:26:22,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240092269] [2023-03-31 00:26:22,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:26:22,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:26:22,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:26:22,397 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) [2023-03-31 00:26:22,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 00:26:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:26:22,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 23 conjunts are in the unsatisfiable core [2023-03-31 00:26:22,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:26:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 00:26:22,636 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:26:22,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:26:22,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366813691] [2023-03-31 00:26:22,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:26:22,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240092269] [2023-03-31 00:26:22,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240092269] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:26:22,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:26:22,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-03-31 00:26:22,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630394610] [2023-03-31 00:26:22,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:26:22,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 00:26:22,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:26:22,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 00:26:22,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-03-31 00:26:22,639 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:26:22,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:26:22,797 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2023-03-31 00:26:22,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 00:26:22,797 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-03-31 00:26:22,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:26:22,798 INFO L225 Difference]: With dead ends: 38 [2023-03-31 00:26:22,799 INFO L226 Difference]: Without dead ends: 35 [2023-03-31 00:26:22,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-03-31 00:26:22,801 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:26:22,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 115 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:26:22,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-03-31 00:26:22,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-03-31 00:26:22,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 00:26:22,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-03-31 00:26:22,817 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 24 [2023-03-31 00:26:22,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:26:22,819 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-03-31 00:26:22,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:26:22,819 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-03-31 00:26:22,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 00:26:22,821 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:26:22,821 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:26:22,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 00:26:23,026 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 [2023-03-31 00:26:23,026 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:26:23,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:26:23,027 INFO L85 PathProgramCache]: Analyzing trace with hash 262955552, now seen corresponding path program 1 times [2023-03-31 00:26:23,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:26:23,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018949673] [2023-03-31 00:26:23,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:26:23,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:26:23,038 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:26:23,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1416737518] [2023-03-31 00:26:23,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:26:23,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:26:23,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:26:23,040 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) [2023-03-31 00:26:23,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 00:26:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:26:23,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2023-03-31 00:26:23,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:26:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 00:26:23,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:26:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 00:26:23,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:26:23,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018949673] [2023-03-31 00:26:23,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:26:23,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416737518] [2023-03-31 00:26:23,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416737518] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 00:26:23,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 00:26:23,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2023-03-31 00:26:23,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255394570] [2023-03-31 00:26:23,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:26:23,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 00:26:23,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:26:23,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 00:26:23,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-03-31 00:26:23,387 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 00:26:25,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-03-31 00:26:27,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-03-31 00:26:27,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:26:27,512 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2023-03-31 00:26:27,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 00:26:27,513 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2023-03-31 00:26:27,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:26:27,514 INFO L225 Difference]: With dead ends: 49 [2023-03-31 00:26:27,514 INFO L226 Difference]: Without dead ends: 46 [2023-03-31 00:26:27,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-03-31 00:26:27,515 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:26:27,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 103 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 2 Unknown, 0 Unchecked, 4.1s Time] [2023-03-31 00:26:27,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-03-31 00:26:27,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 33. [2023-03-31 00:26:27,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 00:26:27,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-03-31 00:26:27,523 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 26 [2023-03-31 00:26:27,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:26:27,523 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-03-31 00:26:27,523 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 00:26:27,523 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-03-31 00:26:27,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-03-31 00:26:27,524 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:26:27,524 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:26:27,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-03-31 00:26:27,728 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 [2023-03-31 00:26:27,728 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:26:27,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:26:27,729 INFO L85 PathProgramCache]: Analyzing trace with hash 96987309, now seen corresponding path program 1 times [2023-03-31 00:26:27,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:26:27,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076728644] [2023-03-31 00:26:27,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:26:27,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:26:27,738 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:26:27,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434282084] [2023-03-31 00:26:27,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:26:27,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:26:27,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:26:27,742 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) [2023-03-31 00:26:27,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 00:26:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:26:27,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 00:26:27,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:26:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 00:26:27,797 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:26:27,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:26:27,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076728644] [2023-03-31 00:26:27,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:26:27,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434282084] [2023-03-31 00:26:27,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434282084] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:26:27,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:26:27,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 00:26:27,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988361850] [2023-03-31 00:26:27,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:26:27,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 00:26:27,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:26:27,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 00:26:27,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 00:26:27,800 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 00:26:27,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:26:27,827 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2023-03-31 00:26:27,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 00:26:27,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-03-31 00:26:27,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:26:27,829 INFO L225 Difference]: With dead ends: 49 [2023-03-31 00:26:27,829 INFO L226 Difference]: Without dead ends: 35 [2023-03-31 00:26:27,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 00:26:27,830 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:26:27,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:26:27,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-03-31 00:26:27,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-03-31 00:26:27,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 00:26:27,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-03-31 00:26:27,837 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 32 [2023-03-31 00:26:27,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:26:27,837 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-03-31 00:26:27,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 00:26:27,838 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-03-31 00:26:27,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-03-31 00:26:27,838 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:26:27,838 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:26:27,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 00:26:28,039 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 [2023-03-31 00:26:28,039 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:26:28,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:26:28,039 INFO L85 PathProgramCache]: Analyzing trace with hash 852542504, now seen corresponding path program 1 times [2023-03-31 00:26:28,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:26:28,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112308353] [2023-03-31 00:26:28,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:26:28,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:26:28,049 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:26:28,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906315740] [2023-03-31 00:26:28,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:26:28,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:26:28,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:26:28,051 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) [2023-03-31 00:26:28,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 00:26:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:26:28,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 33 conjunts are in the unsatisfiable core [2023-03-31 00:26:28,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:26:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 00:26:28,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:26:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 00:26:59,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:26:59,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112308353] [2023-03-31 00:26:59,165 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:26:59,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906315740] [2023-03-31 00:26:59,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906315740] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:26:59,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:26:59,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2023-03-31 00:26:59,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190959800] [2023-03-31 00:26:59,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:26:59,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-03-31 00:26:59,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:26:59,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-03-31 00:26:59,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=379, Unknown=3, NotChecked=0, Total=462 [2023-03-31 00:26:59,169 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 19 states have internal predecessors, (37), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-31 00:27:03,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 00:27:06,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 00:27:13,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 00:27:15,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 00:27:17,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-03-31 00:27:20,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 00:27:22,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 00:27:28,718 WARN L223 SmtUtils]: Spent 6.00s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-31 00:27:32,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-03-31 00:27:34,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-03-31 00:27:36,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-03-31 00:27:36,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:27:36,954 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2023-03-31 00:27:36,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-03-31 00:27:36,954 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 19 states have internal predecessors, (37), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 34 [2023-03-31 00:27:36,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:27:36,956 INFO L225 Difference]: With dead ends: 52 [2023-03-31 00:27:36,956 INFO L226 Difference]: Without dead ends: 47 [2023-03-31 00:27:36,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=193, Invalid=860, Unknown=3, NotChecked=0, Total=1056 [2023-03-31 00:27:36,957 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 15 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:27:36,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 216 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 309 Invalid, 7 Unknown, 0 Unchecked, 29.1s Time] [2023-03-31 00:27:36,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-03-31 00:27:36,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2023-03-31 00:27:36,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 00:27:36,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2023-03-31 00:27:36,968 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 34 [2023-03-31 00:27:36,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:27:36,969 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2023-03-31 00:27:36,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 19 states have internal predecessors, (37), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-31 00:27:36,969 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2023-03-31 00:27:36,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-03-31 00:27:36,970 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:27:36,970 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:27:36,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 00:27:37,170 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 [2023-03-31 00:27:37,173 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:27:37,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:27:37,173 INFO L85 PathProgramCache]: Analyzing trace with hash -963207632, now seen corresponding path program 2 times [2023-03-31 00:27:37,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:27:37,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819279763] [2023-03-31 00:27:37,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:27:37,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:27:37,193 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:27:37,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175474105] [2023-03-31 00:27:37,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:27:37,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:27:37,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:27:37,195 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) [2023-03-31 00:27:37,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 00:27:37,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 00:27:37,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:27:37,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 20 conjunts are in the unsatisfiable core [2023-03-31 00:27:37,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:27:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 00:27:37,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:27:37,950 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 00:27:37,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:27:37,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819279763] [2023-03-31 00:27:37,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:27:37,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175474105] [2023-03-31 00:27:37,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175474105] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:27:37,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:27:37,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2023-03-31 00:27:37,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949962956] [2023-03-31 00:27:37,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:27:37,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-31 00:27:37,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:27:37,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-31 00:27:37,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-03-31 00:27:37,952 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-03-31 00:27:38,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:27:38,597 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2023-03-31 00:27:38,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 00:27:38,597 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 42 [2023-03-31 00:27:38,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:27:38,598 INFO L225 Difference]: With dead ends: 75 [2023-03-31 00:27:38,598 INFO L226 Difference]: Without dead ends: 48 [2023-03-31 00:27:38,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-03-31 00:27:38,599 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 23 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 00:27:38,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 164 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 00:27:38,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-03-31 00:27:38,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2023-03-31 00:27:38,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 00:27:38,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2023-03-31 00:27:38,608 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 42 [2023-03-31 00:27:38,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:27:38,608 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2023-03-31 00:27:38,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-03-31 00:27:38,608 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2023-03-31 00:27:38,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-03-31 00:27:38,609 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:27:38,609 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:27:38,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-03-31 00:27:38,814 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 [2023-03-31 00:27:38,815 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:27:38,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:27:38,815 INFO L85 PathProgramCache]: Analyzing trace with hash 2020318187, now seen corresponding path program 3 times [2023-03-31 00:27:38,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:27:38,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075738956] [2023-03-31 00:27:38,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:27:38,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:27:38,823 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:27:38,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824710932] [2023-03-31 00:27:38,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 00:27:38,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:27:38,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:27:38,829 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) [2023-03-31 00:27:38,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process